Battery Charging and Management Solutions - Linear

VOL 7

Battery Charging and Management Solutions High Performance Analog ICs

B AT T E RY C H A R G I N G A N D M A N A G E M E N T S O L U T I O N S

Linear Technology’s high performance battery charging and management ICs enable long battery life and run time, while providing precision charging control, constant status monitoring and stringent battery protection. Our proprietary design techniques seamlessly manage multiple input sources while providing small solution footprints, faster charging and 100% standalone operation. Battery and circuit protection features enable improved thermal performance and high reliability operation. Each battery chemistry has unique charging requirements. Selecting the correct battery charger increases the operational run time of the end product, ensuring that the battery is optimally charged. This guide contains the essential technical criteria to identify the optimum battery charging IC for 1-cell to multiple-cell configurations, regardless of chemistry. Data sheets for our complete battery management product portfolio, including our latest product releases, are available at www.linear.com.

Battery Charging and Management Solutions Battery Charging Products T Y PE

PAGE

TOP OLOGY

BATTE RY CHE M ISTRY

Unique Charging Topologies Wireless Power Transfer + LTC®4120......................................... 2, 3

Lithium-Ion/Polymer

Solar Battery Chargers............................................................... 6-9

LiFePO4

LTC4000 + Companion Switching Regulator ICs........................ 10, 11

NiMH/NiCd

CC/CV Switching Regulators as Battery Chargers...................... 12, 13

Lead-Acid

Supercapacitor/Capacitor Chargers and Backup Power ICs....... 18, 19

Multichemistry Supercapacitor

Switch Mode – Monolithic Lithium-Ion/Polymer

Switch Mode Buck Battery Chargers.......................................... 4 Switch Mode Buck-Boost Battery Chargers............................... 5

SWITCHING VIN

+

MONOLITHIC CHARGER

LiFePO4 BAT

NiMH/NiCd

T

Lead-Acid Multichemistry

Switch Mode – Controller Switch Mode Buck Battery Charger Controllers.......................... 4 Switch Mode Buck-Boost Battery Charger Controllers............... 5 Nickel Battery Chargers.............................................................. 21

Lithium-Ion/Polymer

VIN

LiFePO4

SWITCHING CHARGER

+

BAT

NiMH/NiCd Lead-Acid

T

Multichemistry

Tutorial: PowerPath™ Control.............................................14-16

Visit www.linear.com for our complete product offering.

B AT T E RY C H A R G I N G A N D M A N A G E M E N T S O L U T I O N S

Battery Charging Products (continued) T YPE

PAGE

TOP OLOGY

BATTE RY CHE M ISTRY

Power Managers (BAT Decoupled from VOUT) Linear Power Managers................................................................. 17 Switch Mode Power Managers...................................................... 17

Lithium-Ion/Polymer

WALL WALL SYSTEM SYSTEM LOAD LOAD

USBUSB

4.1V Float Voltage Power Managers.............................................. 24

POWER MANAGER POWER MANAGER

++

BATBAT

T

T

LiFePO4

Switch Mode – Smart Battery Smart Battery Chargers.............................................................. 20

Lithium-Ion/Polymer

VIN

LiFePO4 NiMH/NiCd

+

SMART BATTERY CHARGER

+

Lead-Acid • SPI • SMBus • I/O

BAT

Multichemistry Supercapacitor

Linear Chargers Lithium-Ion/Polymer

Nickel Battery Chargers................................................................. 21 USB Compatible Battery Chargers................................................ 22, 23

NiMH/NiCd

4.2V Charge Voltage (1- and 2-Cell) Battery Chargers................... 22, 23

VIN

“X” Series–Fast Charge Depleted Batteries (No Trickle Charge)...... 23

LINEAR CHARGER

+ T

BAT

4.1V Charge Voltage (1-Cell) Battery Chargers............................... 24 Coin Cell/Low Current Battery Chargers........................................ 25 Linear Charger + Regulators Battery Chargers with Onboard Regulators or Comparators.......... 22

Lithium-Ion/Polymer

VIN

LINEAR CHARGER AND REGULATOR

VOUT1 VOUT2

+

BAT

T

Power Management Integrated Circuits (PMICs) with Integrated Chargers 4.1V Float Voltage PMICs........................................................... 26 Switch Mode Power Manager-Based PMICs.............................. 26

Lithium-Ion/Polymer

USB/WALL 4.35V TO 5.5V

BAT

T

Linear Power Manager-Based PMICs......................................... 27 Battery-Fed PMICs..................................................................... 28

TO OTHER LOADS

+

PMIC ENABLE CONTROLS

5

3.3V/25mA 0.8V TO 3.6V/400mA 0.8V TO 3.6V/400mA 0.8V TO 3.6V/1A RST 2

RTC/LOW POWER LOGIC MEMORY I/O CORE µPROCESSOR I2C

Master Selector Guides for Battery Chargers...................... 38-42 μModule® Battery Chargers.................................................. 43

Battery Management Products Ideal Diodes/PowerPath Controllers............................................ 29

Battery Monitoring – Comparators & Voltage References............. 33

Active Balancing ICs................................................................... 30, 31

Special Functions....................................................................... 34, 35

Battery Stack Monitors for Hybrid/Electric Vehicles and

Pushbutton Controllers............................................................... 36

Battery Backup Systems............................................................ 32

High Side and Low Side Current Sensing................................... 37

2

B AT T E RY C H A R G I N G S O L U T I O N S

Lithium-Ion/Polymer

LiFePO4

Wireless Power Receiver & Buck Battery Charger LTC4120 The LTC4120, a high performance wireless receiver and battery charger, serves as the central component of the receiver electronics in a wireless battery charging system. The Linear Technology wireless power system is designed to transmit up to 2W to a battery with a maximum charge current of 400mA. The programmable float voltage of the device accommodates several battery chemistries and configurations. The IC utilizes a patented dynamic harmonization control (DHC) technique that enables high efficiency contactless charging with maximum TX to RX coil distance and misalignment without any of the thermal or overvoltage issues typically associated with wireless power systems. Wireless charging with the LTC4120 enables or improves many different applications. For instance, expensive connectors which become failure-prone in harsh environments can be eliminated. Similarly, wireless charging allows for a completely sealed enclosure for applications that require sterilization. Elimination of wires enables rechargeable batteries to be placed in moving or rotating equipment. Some applications are simply too small to use a conventional connector. Wireless charging can also provide transformerless galvanic isolation for high reliability isolated applications. The LTC4120 provides the ability to charge batteries in applications where it is difficult or impossible to use a connector. Unlike consumer-oriented solutions following the Qi standard, the LTC4120-based solution addresses the needs of high reliability industrial, military and medical applications.

LTC4120 — Key Technical Features •

Dynamic Harmonization Control Reduces Alignment Sensitivity and Extends Power Transmission Range

•

Enables Up to 2W Wireless Charging at Up to a 1.2cm Gap

•

Adjustable Battery Charge Voltage: 3.5V to 11V

•

50mA to 400mA Charge Current, Programmed with a Single Resistor

•

No Microprocessor or Firmware Required

•

No Transformer Core

•

Wide Rectified Input Voltage Range: 4.3V to 40V

•

Thermally Enhanced 16-Lead 3mm × 3mm QFN Package

Applications •

Industrial/Military Sensors and Devices

•

Portable Medical Devices

•

Physically Small Devices

•

Electrically Isolated Devices

•

Devices for Harsh Environments

LTC4120 75% Size Demo Circuit Basic Transmitter Board

LTC4120 75% Size Receiver/Charger Demo Board

Lithium-Ion/Polymer


LiFePO4

Wireless Power Transfer (WPT) An inductive wireless power system consists of transmitter electronics, transmit coil, receive coil and receiver electronics. The LTC4120based resonant coupled system uses dynamic harmonization control (DHC) to optimize power transfer and provide overvoltage protection. This eliminates the need for precise mechanical alignment between the transmit and receive coils as well as the need for a coupling core. The LTC4120 wireless buck charger forms the basis for the receiver electronics. The receive coil can be integrated into the receiver electronics circuit board. Linear Technology offers several transmitter electronics options. The LTC4125 is the power controller for a simple but versatile wireless power transmitter. The LTC4125 enhances a basic wireless power transmitter by providing three key features: an AutoResonant function that maximizes available receiver power, an Optimum Power Search algorithm that maximizes overall wireless power system efficiency and foreign object detection to ensure safe and reliable operation when working in the presence of conductive foreign objects. LTC4120 Product Page: www.linear.com/product/LTC4120 LTC4120 Application Note: www.linear.com/docs/43968 LTC4125 Product Page: www.linear.com/product/LTC4125

COUPLING (TX + RX COIL)

TX CIRCUIT

DC POWER SUPPLY

TX COIL

LTC4120 CIRCUIT

RX COIL

TX

BATTERY

RX

WIRELESS BATTERY CHARGING SYSTEM

14

1W

COIL SEPARATION (mm)

12

Wireless Power Transfer System Block Diagram Charging

10 8

2W

6 4 2 0 0 5 10 –20 –15 –10 –5 COIL CENTER OFFSET (mm)

Part Number

Device Architecture

15

20

Battery Charge Power vs RX-TX Coil Location

Vin Range (V)

Power Level (W)

Auto Resonant Drive

Foreign Object Detection

Optimum Power Transfer

Practical Coupling Distance (mm)

Package (mmxmm)

Yes

13 Full Power 16 Half Power

4x5 QFN-20

Wireless Power Transmitters LTC4125

Wireless Transmitter

3 to 5.5

5

Yes

Yes

Part Number

Device Architecture

Vin Range (V)

Power Level (W)

Charge Current (mA)

Practical Coupling Distance (mm)

Cell (s) Chemistry

Charge Termination Method

Package (mmxmm)

Battery Chargers LTC4120

Wireless Receiver & Battery Charger

4.25 to 40

2

50 to 400

12

1 to 3 Lithium

Adj. Timer

3x3 QFN-16

LTC4123

Wireless Receiver & Battery Charger

2.2 to 5

.038

25

12

1 Nickle

Adj. Timer

2x2 DFN-6

LTC4071

Shunt Battery Charger

N/A Shunt

.21

50

12

1 Lithium

Thermal NTC

2x3 DFN-8

LT3652HV

High Power Battery Charger

4.95 to 34 2 (40V abs max)

12

1 to 5 Lithium Lead Acid

Adj. Timer or C/10

3x3 DFN-12, MSOP-12E

2A

3

4


Lithium-Ion/Polymer

NiMH/NiCd

LiFePO4

Multichemistry

Lead-Acid

Switch Battery Chargers Our step-down (buck) battery chargers enable high efficiency charging from a wide input voltage range for a variety of battery chemistries. LT®3651: Monolithic 4A High Voltage Li-Ion Battery Charger MBRS340

VIN

5.5V TO 32V

CLP SHDN ACPR FAULT CHRG RT 54.9k

TO SYSTEM LOAD

22µF

VIN

CLN

AC ADAPTER INPUT 24VDC AT 1A

SW 1µF

VIN

750k 44.2k 51.1k

1N5819 SENSE

LT3651-4.2

ILIM

24m

BAT 100µF

NTC RNG/SS GND

+

LT3652HV

SW 1µF 10V

VIN_REG

BOOST

SHDN

SENSE

CHRG

BAT

FAULT

NTC

TIMER

VFB

1N4148

20µH 0.068

665k 127k

R1 10K B = 3380

BATTERY

SYSTEM LOAD

+ 10µF

150k 5-Cell LiFePO4 PACK (18V FLOAT)

24V 5-Cell LiFePO4 Charger (18V at 1.5A) with C/10 Termination

7.5V to 32V Single Cell 4A Charger

Part Number

D3 MBRS340

MBRS340

10µF

3.3µH

BOOST

TIMER

Maximum Charge Current (A)

LT3652HV: Power Tracking 2A Battery Charger

VBAT Range (V)

Battery Chemistry

Number of Battery Cells (Series)

Input Voltage (V)

Integrated Power Transistor

Synchronous

Charge Termination

Package (mmxmm)

Switch Mode Multi-Chemistry Buck (Step-Down) Battery Chargers LTC4121

0.4

3.6 to 18

Li-Ion, LiFePO4 SLA, 1-5 LiFePO4 SLA 1-4 Li-Ion

4.3 to 40

~

–

Timer

3x3 QFN-16

LT1510

1

2.5 to 26

NiMH NiCd SLA Li-Ion

1-12 Ni, SLA 1-4 Li-Ion

7 to 29

~

–

External µC or LTC1729

SO-8, SSOP-16, SO-16

LT3652

2

3.3 to 14.4

SLA, LiFePO4 Li-Ion

SLA , 1-4 LiFePO4 1-3 Li-Ion

4.9 to 32†

~

–

Timer or C/10


LT3652HV

2

3.3 to 18

SLA, LiFePO4 Li-Ion

SLA, 1-5 LiFePO4 1-4 Li-Ion

4.9 to 34†

~

–

Timer or C/10

LT1769

2

2.5 to 26



7 to 29

~

–


TSSOP-20, SSOP-28

LT1511

3

2.5 to 26



7 to 29

–

–


SO-24

LTC4008

4

3 to 28



6 to 28

–

~

External µC

SSOP-20

LTC4009/-1*/-2

4

2 to 28


2-18 Ni, 1-4 Li-Ion

6 to 28

–

~

External µC

4x4 QFN-20

LTC4012/-1*/-2/-3 4

2 to 28


2-18 Ni, 1-4 Li-Ion

6 to 28

–

~

External µC

4x4 QFN-20

LT1505

8

2.5 to 23



6.7 to 26

–

~

External µC

SSOP-28

LTC1960

8

3.5 to 28



6 to 28

–

~

External µC

5x7 QFN-38, SSOP-36

LTC4015

20**

up to 35V

LiFePO4 SLA Li-Ion

3/6/12 SLA, 1-9 LiFePO4 1-8 Li-Ion

4.5 to 35

–

~

Timer, C/X

5x7 QFN-38


Switch Mode Li-Ion Buck Battery Chargers LT1571

1.5

2.5 to 26

Li-Ion

1-2, Adj

6.2 to 27

~

–

External µC

SSOP-16, SSOP-28

LTC4001/-1*

2

4.2

Li-Ion

1

4 to 5.5

~

~

Timer

3x3 QFN-16

LT3650-4.1/-4.2

2

4.1, 4.2

Li-Ion

1

4.75 to 32† (40 Max) ~

–

Timer + C/10


LT3650-8.2/-8.4

2

8.2, 8.4

Li-Ion

2

9 to 32† (40 Max)

~

–

Timer + C/10


LT3651-4.1/4.2

4

4.1, 4.2

Li-Ion

1

4.8 to 32

~

~

Timer + C/10

5x6 QFN-36

LT3651-8.2/8.4

4

8.2, 8.4

Li-Ion

2

9 to 32

~

~

Timer + C/10

5x6 QFN-36

LTC4002-4.2/-8.4

4

4.2, 8.4

Li-Ion

1-2

4.7 to 22

–

–

Timer

3x3 DFN-10, SO-8

LTC4006-2/-4/-6

4

5 to 16.8

Li-Ion

2-4

6 to 28

–

~

Timer

SSOP-16

LTC4007/-1

4

7.5 to 16.8 Li-Ion

3-4

6 to 28

–

~

Timer

SSOP-24

*4.1V Cell Voltage, **Depends on external

components, †

Minimum Start-up Voltage is + 3.3V Above VBATMAX

Lithium-Ion/Polymer

LiFePO4

NiMH/NiCd


Multichemistry

Lead-Acid

Buck-Boost Battery Chargers Our buck-boost battery chargers seamlessly charge a battery as its voltage varies below, above or equal to the input voltage. LTC4020: 55V Buck-Boost Multi-Chemistry Battery Charger with Maximum Power Point Control (MPPC) Maximum Power Efficiency vs VIN

Features •

100

Wide Voltage Range: 4.5V to 55V Input, Up to 55V Output (60V Absolute Maximums) Synchronous Buck-Boost DC/DC Controller

•

Li-Ion and Lead-Acid Charge Algorithms

•

±0.5% Float Voltage Accuracy

•

±5% Charge Current Accuracy

•

Instant-On for Heavily Discharged Batteries

•

Ideal Diode Controller Provides Low Loss PowerPath when Input Power is Limited

80

•

Input Voltage Regulation for High Impedance Input Supplies and Solar Panel Peak Power Operation

75

Onboard Timer for Protection and Termination

•

Bad Battery Detection with Auto-Reset

•

NTC Input for Temperature Qualified Charging

•

Low Profile (0.75mm) 38-Pin 5mm × 7mm QFN Package

80

EFFICIENCY (%)

70 60

90

INPUT POWER

50

85

40 30 20 10

P(LOSS) 5

10

20

15

25

0 30

V IN (V)

BUCK-BOOST DC/DC CONVERTER

RSENSEA VIN

PowerPath BATTERY CHARGER

VOUT

RCS

Applications •

Portable Industrial and Medical Equipment

•

Solar-Powered Systems

•

Military Communications Equipment

•

12V to 24V Embedded Automotive Systems

LTC4020 RSENSEB

RNTC

DC2044A 30% of Actual Size Demo Circuit

Buck-Boost DC/DC Converter Controller with PowerPath Battery Charger Accepts Inputs from 4.5V to 55V and Produces Output Voltages Up to 55V

Part Number



VBAT Range (V)

Battery Chemistry

Input Voltage (V)


Synchronous

Charge Termination

Package (mmxmm)

Switch Mode Buck-Boost (Step-Down/Step-Up) Battery Chargers LT1512

1-12 Ni

0.8

1.5 to 20

NiCd NiMH SLA

2.4 to 29

~

–

External µC

SO-8

LT1513

1-12 Ni

1.6

1.5 to 20

NiCd NiMH SLA

2.4 to 29

~

–

External µC

DD Pak, TO-220

LTC1980

1-2 Li-Ion

4

2.85 to 10

NiCd NiMH Li-Ion

4.1 to 12

–

–

External µC, Timer (Li-Ion)

SSOP-24

LTC4110 *†

Up to 10 Ni, 1-4 Li-Ion, Up to 6 SLA

4

3.5 to 18

NiCd NiMH SLA, Li-Ion

6 to 19

–

~

Timer, C/10, SMBus

5x7 QFN-38

LTC4020

SLA, LiFePO4, Li-Ion, SLA

20+**

2.5 to 55

LiFePO4, 1-13 Li-Ion

4.5 to 55

–

~

Timer, C/x

5x7 QFN-38

*Flyback Topology, **Depends on external components, † Supercapacitor Compatible

POWER (W)

•

90

EFFICIENCY

95

•

100

VOUT = 14V

5


Lithium-Ion/Polymer

NiMH/NiCd

LiFePO4

Multichemistry

Lead-Acid

Solar Battery Charging ICs

intermittent power generation nature of solar panels. However, solar panels are non-ideal

Figure 1 Solar Panel I-V Curve Showing Maximum Power

power sources, and the operating point at which maximum power is generated depends

Full Sun 72-Cell 180W

on many factors such as incident light (including any partial shading), temperature and

7

panel aging. When discussing solar panels and power, terms such as maximum power

6

point tracking (MPPT) and maximum power point control (MPPC) are often used.

5

As can be seen in Figure 1, the output current of a solar panel varies nonlinearly with the panel voltage. Under short-circuit conditions, the output power is zero since the output voltage is zero. Under open-circuit conditions, the output power is zero since the output current is zero. Most solar panel manufacturers specify the panel voltage at maximum power (Vmp). This voltage is typically around 70 – 80% of the panel’s open circuit voltage (Voc). In Figure 1 the maximum power is just under 140W with Vmp just under 32V and Imp just under 4.5A. Ideally, any system using a solar panel would operate that panel at its maximum power output. This is particularly true of a solar powered battery charger, where the goal is to capture and store as much solar energy as possible, as quickly as possible. Put another way, since we cannot predict the availability or intensity of solar power, we need to harness as much energy as possible while energy is available. There are many different ways to operate a solar panel at its maximum power point. One of the simplest is to connect a battery to the solar panel through a diode. This technique is described in the Linear Technology article “Energy Harvesting with Low Power Solar Panels” (www.linear.com/solutions/1786). It relies on matching the maximum output voltage of the panel to the relatively narrow voltage range of the battery. When available power levels are very low (approximately less than a few tens of milliwatts), this may be the best approach. The article describes using the LTC4071 with a single-cell Li-Ion/ polymer battery. However, the same basic approach can be used with the LTC4079 (without the diode). The LTC4079 dramatically increases the flexibility of this approach by allowing any battery voltage from 1.2V to 60V. Therefore, a specified solar panel can be matched to a battery or a specified battery can be matched to a panel. An alternate approach is to implement a complete maximum power point tracking (MPPT) algorithm. There are a variety of MPPT algorithms, but most have the ability to sweep the entire operating range of the solar panel to determine where maximum power is produced. The LT8490 is an example of an integrated circuit that performs this function. The advantage of a full MPPT algorithm is that it can differentiate a local power peak from a global power maximum. In multicell solar panels, it is possible to have more than one power peak during partial shading conditions (see Figure 2). The difference in available power between operating at the true global maximum power point and a false local maximum can be very large. Typically, a full MPPT algorithm is required to find the true maximum power operating point. It does so by periodically sweeping the entire output range of the solar panel and remembering the operating conditions where maximum power was achieved. When the sweep is complete, the circuitry forces the panel to return to its maximum power point. In between these periodic sweeps, the MPPT algorithm will continuously dither the operating point to ensure that it operates at the peak.

Pmp

4 Imp 3 2 1 0

0V

10V

20V

30V

Panel Output Voltage

40V

50V

140 130 120 110 100 90 80 70 60 50 40 30 20 10 0

Panel Output Power (W)

Batteries are often paired with solar panels to provide energy storage for the inherently

Panel Output Current (A)

6

Current Power

LiFePO4

NiMH/NiCd

Lead-Acid


Multichemistry

An intermediate approach is something that Linear Technology calls maximum power point control (MPPC). This technique takes advantage of the fact that the maximum power voltage (VMP) of a solar panel does not, typically, vary much as the amount of

Figure 2 Partially Shaded Solar Panel Showing Multiple Power Maxima Partially Shaded 72-Cell 180W Panel

incident light changes (see "Solar Battery Charger Maintains High Efficiency in Low 7

Light" for more information). Therefore, a simple circuit can force the panel to operate at

6

measure the panel voltage and if the input voltage falls below the programmed level, the

5

load on the panel is reduced until it can maintain the programmed voltage level. Products with this functionality include the LTC3105, LTC3129, LT3652(HV), LTC4000‑1, and the LTC4020. Depending on solar panel construction, shading conditions and incident light levels, a full MPPT algorithm can extract considerably more power from a solar panel

Panel Output Current (A)

a fixed voltage and approximate maximum power operation. A voltage divider is used to

4 3 2

than an MPPC algorithm. However, under some circumstances, the simplicity of an

1

MPPC approach may be a better choice.

0

A recent Linear Technology product introduction provides yet another technique to extract maximum power from a limited source. The new approach is a blend of a full MPPT algorithm and an MPPC function. The LTC4121 employs an MPPT algorithm that compares a stored open-circuit input voltage measurement against the instantaneous input voltage while charging. The LTC4121 automatically reduces the charge current if the input voltage falls below the user-defined percentage of the open-circuit voltage. This algorithm lets the LTC4121 optimize power transfer for a variety of different input sources including first order temperature compensation of a solar panel. While this technique will not differentiate between local and global maxima, it will adjust its operating conditions as temperature varies, and it can accommodate a variety of solar panels without hardware changes assuming the ratio of VMP to VOC remains approximately constant. In summary, there are many different ways of operating a solar panel at its maximum output operating condition. The panel can be connected to a battery (through a diode) whose voltage range is close to the maximum power voltage of the panel. A full MPPT algorithm, including periodic global sweeps to find the global maximum and a continuous dither to remain at that maximum can be used (an example is the LT8490). Other products implement an input voltage regulation technique (MPPC) to operate a solar panel at a fixed operating voltage, including the energy harvesting switching regulator devices LTC3105, LTC3129, the charge controller LTC4000-1, plus the battery chargers LT3652(HV), and the LTC4020. Finally, the LTC4121 blends two approaches.

0V

10V

20V

30V

Panel Output Voltage

40V

50V

140 130 120 110 100 90 80 70 60 50 40 30 20 10 0

Panel Output Power (W)

Lithium-Ion/Polymer

Current Power

7

8


Lithium-Ion/Polymer

NiMH/NiCd

LiFePO4

Multichemistry

Lead-Acid

Solar Battery Chargers: Switch Mode Buck / Buck-Boost, Linear and Shunt LT8490 - High Voltage, High Current Buck-Boost Battery Charge Controller with Maximum Power Point Tracking (MPPT) Features • V Range: 6V to 80V IN

Typical Application Circuit

•

VBAT Range: 1.3V to 80V

•

Single Inductor Allows VIN Above, Below or Equal to VBAT

•

Automatic MPPT for Solar Powered Charging

•

Automatic Temperature Compensation

•

No Software or Firmware Development Required

•

Operation from Solar Panel or DC Supply

GATEVCC´

SOLAR PANEL

LOAD TG1

BOOST1 SW1 BG1 CSP CSN

Input and Output Current Monitor Pins

•

Four Integrated Feedback Loops

•

Synchronizable Fixed Frequency: 100kHz to 400kHz

•

64-Lead (7mm × 11mm × 0.75mm) QFN Package

•

Li-Ion Battery Charger

•

Battery Equipped Industrial or Portable Military Equipment

TG2

CSPOUT CSNOUT EXTVCC

CSNIN CSPIN VIN

LT8490 LT8490

GATEVCC´

+

–

RECHARGABLE BATTERY

AVDD

TEMPSENSE

THERMISTOR

GATEVCC INTVCC

Applications • Solar Powered Battery Chargers Multiple Types of Lead-Acid Battery Charging

BG2 SW2 BOOST2

VBAT

•

•

GATEVCC´

STATUS

FAULT

GND AVDD

AVDD

FULL PANEL SCAN VPANEL 6V/DIV PERTURB & OBSERVE

PERTURB & OBSERVE

IPANEL 1.36A/DIV

0.5s/DIV BACK PAGE APPLICATION

Maximum Power Point Tracking

Part Number


VBAT Range (V)

Battery Chemistry


Input Voltage (V)


Synchronous

Charge Termination

MPPx

Package (mmxmm)

Switch Mode Multi-Chemistry Buck and Buck-Boost (Step-Down/Step-Up) Solar Battery Chargers LT3652

2

3.3 to 14.4

SLA, LiFePO4 Li-Ion

SLA , 1-4 LiFePO4, 1-3 Li-Ion

4.9 to 32†

~

–

Timer or C/10

MPPC


LT3652HV

2

3.3 to 18

SLA, LiFePO4 Li-Ion

SLA, 1-5 LiFePO4, 1-4 Li-Ion

4.9 to 34†

~

–

Timer or C/10

MPPC


LTC4121

400mA

3.5V to 18V

SLA LiFePO4 Li-Ion

SLA 1-5 LiFePO4, 1-4 Li-Ion

4.4V to 40V

~

~

Timer

MPPT

3x3 QFN-16

LTC4020

20+*

2.5V to 55V

SLA, LiFePO4, Li-Ion


4.5V to 55V

–

~

Timer, C/x

MPPC

5x7 QFN-38

LT8490

20+*

1.3V to 80V SLA, Li-Ion

SLA, 1-19 Li-Ion

2.8V to 80V

–

~

Timer, C/10

MPPT

5x7 QFN-38, TSSOP-38

SLA, 1-14 Li-Ion, 1-50 Ni

2.7V to 60V

~

n/a

C/10, Timer

DVReg^ 3x3 DFN-10

Linear Multi-Chemistry Solar Battery Chargers LTC4079

250mA

1.2V to 60V SLA Li-Ion, Ni

Shunt Solar Battery Chargers LTC4070

50mA

2.7V to 4.2V Li-Ion

1, unlimited

~

–

n/a

n/a

n/a

2x3 DFN-8, MSOP-8

LTC4071

50mA ^^

2.7V to 4.2V Li-Ion

1, unlimited

~

–

n/a

n/a

n/a

2x3 DFN-8, MSOP-8

* Depends on external components ^ Differential voltage regulation ^^ 500mA with external PFET

Lithium-Ion/Polymer

NiMH/NiCd

LiFePO4


Multichemistry

Lead-Acid

LTC4020 - 55V Buck-Boost Multi-Chemistry Battery Charger with Maximum Power Point Control (MPPC) Features • Wide Voltage Range: 4.5V to 55V Input, Up to 55V Output (60V Absolute Maximums)

Applications • Solar-Powered Systems

•

Synchronous Buck-Boost DC/DC Controller

•

Portable Industrial and Medical Equipment

•

Li-Ion and Lead-Acid Charge Algorithms

•

Military Communications Equipment

•

Input Voltage Regulation for High Impedance Input Supplies and Solar Panel Peak Power Operation

•

12V to 24V Embedded Automotive Systems

•

±0.5% Float Voltage Accuracy

•

±5% Charge Current Accuracy

•

Instant-On for Heavily Discharged Batteries

•

Ideal Diode Controller Provides Low Loss PowerPath when Input Power is Limited

•

Onboard Timer for Protection and Termination

•

Bad Battery Detection with Auto-Reset

•


•

Low Profile (0.75mm) 38-Pin 5mm × 7mm QFN Package

VIN 24V TO 55V

RSENSEA 0.01

1µF +

Si7850DP

56µF ×2

MBRS360

VOUT

Si7850DP

0.1µF

IHLP-5050FD-5A 22µH Si7850DP

Si7850DP

4.7µF +

RSENSEB 0.01

56µF ×2

4.7µF SBR0560S1

PGND PVIN BG1 SW1 TG1

1µF

BST1 SGND

INTVCC

LTC4020 LTC4020

RT, 100k

SENSGND

VC

SENSBOT SENSTOP SENSVIN

VFBMAX

RT

33k

680pF

ITH ILIMIT CSOUT

365k 1.5nF

2nF 20k

100Ω

CSP

SHDN 10k 12k

1µF

BZX84C6V2L

BST2 SGND

0.033µF

191k

SBR0560S1

BG2 SW2 TG2

VIN_REG MODE STAT1 STAT2 TIMER RNG_SS

CSN

0.33µF 100Ω

Si7465DP

BGATE BAT VFBMIN

SGNDBACK

FBG VFB

RSENSE 0.02Ω

20k

356k RNTC 10k

NTC 12-CELL Li-ION (48V)

Application Schematic: Remote 24V to 55V (48V System) Input to 12-Cell Li-Ion (48V) PowerPath Charger/System Supply. 5A Inductor Current Limit with 2.5A Battery Charge Current Limit. Minimum VIN is 24V as Input Regulation Limits Voltage Loss Due to Line Impedance. Battery Termination Voltage Is 48V with Maximum Output Voltage of 52.8V. Instant-On Functionality Limits Minimum Regulated Output Voltage to 40.8V.

9


Lithium-Ion/Polymer

NiMH/NiCd

LiFePO4

Lead-Acid

Multichemistry

The Power and Flexibility of the LTC4000 / LTC4000-1 The LTC4000 is a high voltage controller and power manager which, when paired with an externally compensated DC/DC converter, becomes a full-featured battery charger solution. The LTC4000 is capable of driving virtually any topology, including buck, boost, buck-boost, SEPIC and flyback converters. Its intelligent PowerPath manager provides power to the system load when input power is available, enabling instant-on operation even with a deeply discharged battery. A full-featured controller, the LTC4000 can charge a variety of battery types including lithium, nickel and lead-acid based chemistries. Highly accurate charge current and float voltage, as well as onboard termination, ensure safe and accurate charging. Complete Solution: PowerPath™ Control & Termination, No Software

12S 2.2Ah Li-Ion Charge Curves

60V, 20A+ Battery Charging Controller 52

Features • Input/Output Voltage: 3V to 60V

2.5 VBAT

49

Charge Currents up to 20A+

•

Input Ideal Diode for Low Loss Reverse Blocking and Load Sharing

•

Programmable Input and Charge Current: ±1% Accuracy

•

±0.1% Accurate Programmable Float Voltage

•

Programmable C/X or Timer-Based Charge Termination

•

NTC Input for Temperature-Qualified Charging

•

LTC4000-1 for Solar Panel Input Applications

46

Buck

1.5 IBAT

43

1.0

40

0.5

37

0.0

34 0:0:00

DC/DC Converter

2.0

1:30:00 0:30:00 1:00:00 1:15:00 0:15:00 0:45:00 TIME (HR:MIN:SEC)

Boost Buck-Boost SEPIC

VIN 3V to 60V

System

Flyback

ITH

Turns Any Switching Regulator Into a Charger

IGATE VM

BGATE

LTC4000 Status

BAT

I = Up to 20A+

CHRG GND

Multicell Battery Stack

LTC4000 Buck-Boost Configuration Actual Size Demo Circuit

–0.5

CHARGE CURRENT (A)

•

BATTERY VOLTAGE (V)

10

Lithium-Ion/Polymer

NiMH/NiCd

LiFePO4

Lead-Acid


Multichemistry

LTC4000, LTC4000-1 Paired with Example Companion Switching Regulators 15V to 60V Buck 10A Charger for 3-Cell LiFePO4

12V to 21V Boost 10A Charger for 24V Lead-Acid

VIN

VIN

VOUT

VOUT BUCK CONTROLLER

ITH

BOOST CONTROLLER

CC

CSN

CLN IN

IID IGATE

LTC4000

OFB

BGATE OFB

FBG CL

TMRC

X

GND

BIAS

CSP

CSN

CLN IN

BGATE

LTC4000

CC

ITH

IID IGATE CSP

FBG

BFB

TMRC

CL

X

GND

BIAS

BFB

BAT

BAT

18V to 72V Flyback 2A Charger for 1-Cell Li-Ion

6V to 36V Buck-Boost 5A Charger for 4-Cell LiFePO4

VOUT VIN

VIN

VSYS

•

VOUT

• VCC

FLYBACK CONTROLLER

VCC

VOUT

IN

BUCK BOOST CONTROLLER

CLN IID IGATE CSP

LTC4000

CSN

ITH

CC

IID IGATE CSP

CC BGATE

CSN

CLN ITH

OFB

LTC4000

IN

BGATE OFB

FBG

FBG

BFB CL TMRC X

CL

GND BIAS

TMRC

X

GND

BIAS

BFB

BAT BAT

Topology

LTC4000 + Switcher

Input Voltage (V)

Output Voltage (V)

Charge Current (A)

Battery

Lab-Tested LTC4000 Applications Buck-Boost

LTC3789

5-30

14.4

10

4 Cell LiFePO4

Buck-Boost

LTC3789

6-36

14.6

5

4 Cell LiFePO4

Buck-Boost

LTC3789

9-30

16.8

5

4 Cell Li-Ion

Buck-Boost

LTC3789

10-27

24

4

12 Cell Lead-Acid

Buck-Boost

LTC3789

11-13

13.6

4

6 Cell Lead-Acid

Buck-Boost

LTC3789

11-13

38

2.5

18 Cell Lead-Acid

Buck-Boost

LT3790

6-60

14.5

6.5

4 Cell LiFePO4

Buck-Boost

LT8705 (+ LTC4000-1)

15-60

29.4

6.25

7 Cell Li-Ion

Boost

LTC3787

12-21

30

10

12 Cell Lead-Acid

Boost

LTC3862

19-24

42.5

5

11 Cell Li-Ion

Boost

LTC3862

19-24

53.3

5

13 Cell Li-Ion

Boost

LTC3786

6-21

21

5

5 Cell Li-Ion

Buck

LT3845A

24-60

16.8

10

4 Cell Li-Ion

Buck

LT3845A

15-60

10.8

10

3 Cell LiFePO4

Active Clamp Forward

LTC3765, LTC3766

12-36

28

7

Lead-Acid

AC / DC

NCP1012

110/220 (AC)

14.4

0.33

4 Cell LiFePO4

Flyback

LTC3805

18-72

4.2

2

1 Cell Li-Ion

11

12


Lithium-Ion/Polymer

NiMH/NiCd

LiFePO4

Multichemistry

Lead-Acid

Supercapacitor

CC/CV Switching Regulators as Battery Chargers In some battery powered applications, a system microcontroller already exists that can assume some, if not all, of the functions required to safely manage the charging of the battery. In other cases, an integrated battery charger IC that meets the design requirements may not exist. While the LTC4000 can help in many of these scenarios, a switching regulator with the ability to accurately control both its output voltage and its output current may be sufficient. This section describes a variety of Linear Technology products that meet this requirement. Typically, these products can be used in several different power topologies with extremely wide voltage operating ranges. LT3790 - 60V Synchronous 4-Switch Buck-Boost Controller Features • 4-Switch Single Inductor Architecture Allows V Above, Below or Equal to VOUT IN •

Synchronous Switching: Up to 98.5% Efficiency

•

Wide VIN Range: 4.7V to 60V

•

2% Output Voltage Accuracy: 1.2V ≤ VOUT < 60V

•

6% Output Current Accuracy: 0V ≤ VOUT < 60V

•

38-Lead TSSOP Package

PVIN 9V TO 58V

RIN 0.003

1µF 51

VIN

D1 IVINN

TG1

30.9k

BG1

OVLO

LT3790

IVINMON ISMON CTRL

BG2 SW2 TG2 ISP

VREF PWM

CCM RT

SS SYNC VC D1, D2: BAT46WJ 84.5k L1: COILCRAFT SER2915L-103K 2.2k 22nF 300kHz M1-M4: RENESAS RJK0651DPB M5: NXP NX7002AK 22nF CIN2: NIPPON CHEMI-CON EMZA630ADA101MJA0G COUT2: SUNCON 50HVT220M

Output Voltage (V)

+

1µF

Topology

2.4A CHARGE

36V SLA BATTERY AGM TYPE 41V FLOAT 44V CHARGE AT 25°C

51

ISN FB C/10

100k

Input Voltage (V)

RBAT 0.025

SNSN PGND

SGND

Part #

COUT2 220µF 50V

M3

RSENSE 0.004

CLKOUT

0.1µF

L1 10µH

M2

+

M4

0.1µF

SNSP

SHORT PWMOUT

CHARGE CURRENT CONTROL

M1

SWI

EN/UVLO INTVCC 200k

0.1µF

BST1

IVINP

57.6k

4.7µF

D2

CIN2 100µF 63V

BST2

470nF 499k

+

INTVCC

LT3790: 2.4A Buck-Boost 36V SLA Battery Charger

1.00M INTVCC 20k

402k

30.1k M5

IOUT Accuracy

VOUT Accuracy

Charger Features

Package (mm x mm)

CC/CV Switching Regulators as Battery Chargers LT3741

6 to 36

Up to 34

Buck

±6%

±1.5%

-


LT3763

6 to 60

Up to 55

Buck

±6%

±1.5%

C/10

TSSOP-28

LT3761

4.5 to 60

Up to 80

Boost/SEPIC

±3%

±2%

C/10

MSOP-16E

LT3796

6 to 100

Up to 100

Boost/SEPIC

±3%

±2%

C/10

TSSOP-28

LT3955

4.5V to 60

Up to 80

Boost/SEPIC

±3%

±2%

C/10

5x6 QFN-36

LT3790

4.7 to 60

Up to 60

Buck-Boost

±6%

±2%

C/10

TSSOP-38

LT8705

2.8 to 80

Up to 80

Buck-Boost

±9%

±1.8%

-


Lithium-Ion/Polymer

NiMH/NiCd

LiFePO4

Multichemistry

Lead-Acid


Supercapacitor

CC/CV Switching Regulators as Battery Chargers (continued) LT3796: 100V Constant-Current and Constant-Voltage Controller with Dual Current Sense

LT3796: SEPIC Sealed Lead-Acid (SLA) Battery Charger

R1 10k

•

Current Monitoring Up to 100V

•

High Side PMOS Disconnect and PWM Switch Driver

• •

C1 4.7µF 50V

D2 15V

R2 806k

R6 2k

R4 357k VIN

R3 20k

PWM

VREF

LT3796

ISP

OUT

ISN

BAT

M3

VMODE

SS

VMODE

R8 49.9k INTVCC

VC

M1: VISHAY SILICONIX Si7456DP M2: VISHAY SUD19P06-60-E3 M3: ZETEX ZXM61N03F L1: COILCRAFT MSD1260-333 D1: ON SEMI MBRS260T3G D2: CENTRAL SEMI CMDZ15L R11: MURATA NCP18XH103F03RB

RT

FAULT

C5 4.7µF

RT 19.6k 400kHz

RC 499

INTVCC R14 49.9k FAULT

CC 10nF

LT3955: Battery Charger Waveforms

Features • Wide V Range: 4.5V to 60V IN

VBAT 10V/DIV THE PART IS TURNED ON I

•

Internal 80V/3.5A Switch

•

Programmable PWM Dimming Signal Generator

•

Constant Current (±3%) and Constant-Voltage (±2%) Regulation

•

Accurate Analog Dimming

R10 10.2k

R9 113k

ISMON

C7 0.1µF

TG

Rail-to-Rail Current Sense Range: 0V to 80V

BAT

RSNS 15m

SYNC

•

+

FB1 R7 40.2k

C4 0.1µF

LT3955: 60VIN LED Converter with Internal PWM Generator

R11 10k NTC

GND

CSOUT

28-Lead TSSOP Package

R12 30.1k R13 93.1k

M1

GATE

FB2

CSOUT C3 10nF

C2 250m 10µF

SENSE

CTRL

Constant-Current and Constant-Voltage Regulation

VCHARGE = 14.6V VFLOAT = 13.5V AT 25°C

BAT RSNS2

CSN

VS CSP

VREF

OPTIONAL INPUT CURRENT REPORTING

OUT D1

L1B

EN/UVLO

R5 100k

OUTPUT CURRENT REPORTING

•

C6 2.2µF 100V

L1A 33µH

RSNS1 50m

IIN

•

Features • Wide Input Voltage Range: 6V to 100V

M2

•

VIN 8V TO 40V 100V (TRANSIENT)

CURRENT HITS C/10 BATTERY IS HELD AT FLOAT VOLTAGE

BAT

0.33A/DIV VMODE 10V/DIV

10ms/DIV NOTE: WAVEFORMS SHOWN AS TESTED WITH 5Ω IN SERIES WITH 2mF CAPACITIVE LOAD.

5mm x 6mm QFN-36 Package

LT3955: Solar Panel SEPIC Battery Charger WÜRTH SOLAR PANEL VOC = 37.5V VMPP = 28V 23W VIN 300k

475k

VIN EN/UVLO

1.2

CHARGING CURRENT (A)

INTVCC

158k

0

0.1µF 499k 10nF

20

24

28

32 VIN (V)

36

250m

+ 10µF 25V

30.1k

93.1k

40 M1: ZETEX ZXM61N03F L1: COILTRONICS DRQ127-330-R D1: ON SEMI MBRS260T3G Q1: ZETEX FMMT593

VC

OUT BAT

113k M1

VMODE

DIM/SS 100k

0.2

VCHARGE = 14.3V VFLOAT = 13.3V AT 25°C

BAT

FB

VREF

0.4

OUT

PGND

ISP ISN

CTRL

0.8 0.6

L1B

PWMOUT SYNC

LT3955 Q1

•

SW

24.9k

1.0

D1

•

4.7µF 50V

IBAT vs VIN

2.2µF 50V

L1A, 33µH 1:1

PWM

INTVCC GND GNDK RT 28.7k 350kHz

49.9k INTVCC 1µF

10.5k

10k NTC

BAT

13

14


Tutorial: PowerPath Control Battery-Fed (Charger-Fed) Systems First generation USB system applications incorporated a currentlimited battery charger directly between the USB port and the battery

AC ADAPTER

(see Figure 1). In this battery-fed topology, the battery directly powers the system and the power available to the system from the USB can

VIN

USB

be expressed as: PSYS = IUSB • VBAT

LINEAR CC/CV CHARGER

because VBAT is the only voltage available to the system load. For

BAT

linear chargers, input current approximately equals charge current, so a simple current limit is sufficient. Connecting the system load directly to the battery eliminates the need for a load sharing diode. Disadvantages

+

of this topology include low efficiency, 500mA maximum charge

BAT

SYSTEM LOAD

current from the USB, no system power when the battery voltage is low (i.e., a dead or missing battery), and loss of nearly half of the available Figure 1: Simplified Battery-Fed Control Circuit

power within the linear battery charger element as heat. Furthermore, an additional resistor and signal transistor are required to increase charge current when a wall adapter is present.

Linear PowerPath Power Managers Second generation USB charging systems, commonly referred to as

PowerPath system, nearly all of the 2.5W available from the USB port

PowerPath systems, develop an intermediate voltage between the USB

is accessible to the system load provided the system load does not

port and the battery (see Figure 2). In PowerPath systems, the USB port

exceed the input current limit. Furthermore, if the system requires more

supplies current to an intermediate voltage, VOUT, via a current-limited

power than is available from the input, an ideal diode also supplies

switch. VOUT powers both the linear battery charger and the system load

current to the load from the battery. Thus, a linear PowerPath system

with priority going to the system load. By decoupling the battery from the

offers significant advantages over a battery-fed system. But significant

system load, charging can be carried out opportunistically. PowerPath

power may still be lost, especially if the system load exceeds the input

systems also offer instant-on operation because the intermediate

current limit and the battery voltage is low, resulting in a large differential

voltage is available for system loads as soon as power is applied to

between the input voltage and both the system voltage and the battery

the circuit—this allows the end product to operate immediately when

voltage. An optional external PFET can reduce the ideal diode voltage

plugged in, regardless of the battery’s state of charge. In a linear

drop during heavy load conditions.

AC ADAPTER

USB

VBUS

LINEAR USB

CURRENT LIMIT

OUT

LINEAR CC/CV CHARGER

IDEAL DIODE

OPTIONAL: AUGMENTS INTERNAL IDEAL DIODE

GATE

BAT

+

Figure 2: Simplified Linear Power Manager Circuit

BAT

SYSTEM LOAD


Switch Mode PowerPath Power Managers Third generation USB charging systems feature a switch mode-based

current limit allows the use of nearly all of the 2.5W available from the

topology (see Figure 3). This type of PowerPath device produces an

USB port, independent of operating conditions. By ensuring that the

intermediate bus voltage from a USB-compliant step-down switching

Bat-Track regulation loop does not allow the output voltage to drop

regulator that regulates a small differential voltage above the battery

below 3.5V (even with severely discharged batteries) this topology

voltage. Linear Technology refers to this as Bat-Track™ adaptive output

also provides instant-on functionality. As in linear PowerPath systems,

control because the output voltage tracks the battery voltage. The

an ideal diode allows the battery to supplement input power during

differential voltage between the battery and the system is large enough

heavy load transients. An optional external PFET can reduce the ideal

to allow full charging through the linear charger, but small enough to

diode voltage drop. This architecture is suitable for systems with large

minimize power lost in the charger, thereby increasing system efficiency

(>1.5AHr) batteries and high (>2W) system power.

and maximizing power available to the load. The switching average input

AC ADAPTER

USB

VBUS

SW

OUT SWITCHING USB CURRENT LIMIT LINEAR CC/CV CHARGER

IDEAL DIODE

OPTIONAL: AUGMENTS INTERNAL IDEAL DIODE

GATE

BAT

+

Figure 3: Simplified Switch Mode Power Manager Circuit

BAT

SYSTEM LOAD

15

16


External High Voltage Switching Regulator Control Several Linear Technology power manager ICs (both linear and switching) provide the ability to adaptively control the output of an external high voltage switching regulator (see Figure 4). The WALL pin detects the presence of a high voltage supply (e.g., car battery, 12V wall adapter, FireWire input) and enables Bat-Track adaptive output control via the buck regulator’s VC pin. Similar to a switching PowerPath system, the output of the high voltage buck is regulated to a small differential voltage above the battery voltage with a minimum output voltage of approximately 3.5V. This functionality maximizes charger efficiency while still allowing instant-on operation even when the battery is deeply discharged. Compared to the traditional approach of converting a high voltage input to 5V to power the system,this technique can reduce system power dissipation by over 50%. By choosing an LT3653 as the high voltage regulator, further system improvements can be made (see Figure 5). The LT3653 accurately controls its maximum output current, which eliminates the potential for localized heating, reduces the required current rating of the power components and provides a robust solution to withstand harsh overload and short-circuit conditions. In addition, the unique LT3653 architecture eliminates a power PFET and output capacitor from the application schematic.

SW

HV INPUT

VIN

LT3653

SW

HIGH VOLTAGE

HIGH VOLTAGE BUCK REGULATOR REGULATOR BUCK

USB

VBUS

HV INPUT

FB

VC

VC

BUCK REGULATOR

WALL

CHARGER/POWER MANAGER

VIN

ISENSE

VOUT

VC

HVOK

VC

WALL

ACPR OUT OPTIONAL: AUGMENTS INTERNAL IDEAL DIODE

GATE

SYSTEM LOAD

USB

BAT

+

VBUS

ACPR OUT OPTIONAL: AUGMENTS INTERNAL IDEAL DIODE

CHARGER/POWER MANAGER

GATE

BAT BAT

+

Figure 4: Simplified HV Switching Regulator Control Circuit

Attribute

Battery-Fed

BAT

Figure 5: Simplified LT3653 Control Circuit

Linear PowerPath

Switch Mode PowerPath

Table 1: Comparison of USB-Compliant Battery Charging System Topologies Size

Small

Moderate

Larger

Complexity

Simple

Moderate

More Complex

Solution Cost

Low

Moderate

Higher

USB Charge Current

Limited to 500mA

Limited to 500mA

500mA and Higher (~2.3W)

Autonomous Control of Input Power Sources

No

Yes

Yes

Instant-On Operation

No

Yes

Yes

System Load Efficiency (IBUS
Good (VBAT/VBUS)

Exceptional (>90%)

Excellent (~90%)

System Load Efficiency (ISYS>USB Limit)

Good (VBAT/VBUS)

Good (VBAT/VBUS)

Excellent (~90%)

Battery Charger Efficiency

Good (VBAT/VBUS)

Good (VBAT/VBUS)

Excellent (~90%)

Power Dissipation

High

Moderate

Low

Bat-Track Adaptive Output Control/ Interface to HV Buck

No

Yes

Yes

SYSTEM LOAD

Lithium-Ion/Polymer


LiFePO4

USB Power Managers: Battery Chargers with PowerPath Control PowerPath products and architectures permit the load to be powered

LTC4098:

LTC4090:

from both VIN and the battery, enabling shorter charge time, instant-on

Actual Size Demo Circuit


operation (even with a dead or missing battery) and more flexibility for the portable device designer. Other key features include standalone operation and thermal regulation. LTC4098/-1: USB Power Manager with Overvoltage Protection HV INPUT AUTOMOTIVE, FIREWIRE, ETC.

LTC4090: USB Power Manager with 2A High Voltage Bat-Track Buck Regulator

HIGH (6V-36V) VOLTAGE INPUT

LT3480 3.3µH VBUS

USB

10µF 6.04k TO µC

3

WALL

VC

ACPR

SYSTEM LOAD

VOUT

BAT

D0-D2 CLPROG 3.01k

PROG

GND

HVPR

LTC4090

IDGATE

OVSENS

0.1µF

IN

USB

LTC4098/LTC4098-1

BATSENS

1k

10µF

Li-Ion

OUT

TIMER

BAT CLPROG

40.2k

270pF

1k

VC

RT

59k

+

SW

BOOST

HVOUT

5V WALL ADAPTER

SW

LTC4098/LTC4098-1 OVGATE

HVIN

GND

2k

SYSTEM LOAD

PROG 100k

+

Li-Ion

High Efficiency USB/Automotive Power Manager with Overvoltage Protection High Voltage USB Power Manager with Bat-Track Adaptive Output Control Number of Battery Cells (Series)

Part Number

Max Charge Current from Wall (A)

Max Charge Current from USB (mA)

Input Voltage (V)

Power Manager Topology

Charge Termination (Plus Indication)

Ideal Diode RDS(ON)

Package (mm x mm)

USB Power Managers and Li-Ion/Polymer Linear Battery Chargers with PowerPath Control LTC4055/-1*

1

1

500

4.35 to 5.5

Linear

Timer

200mΩ

4x4 QFN-16

LTC4089*

1

1.2

500

4.35 to 5.5 USB, 6-36, 40 Max Wall

Linear

Timer + C/10

215mΩ, (<50mΩ Opt.)

3x6 DFN-22

LTC4089-5

1

1.2

500

4.35 to 5.5 USB, 6-36, 40 Max Wall

Linear

Timer + C/10

215mΩ, (<50mΩ Opt.)

3x6 DFN-22

LTC4089-1*† /-3*^

1

1.2

500

4.35 to 5.5 USB, 6-36, 40 Max Wall

Linear

Timer + C/10

215mΩ, (<50mΩ Opt.)

3x6 DFN-22

LTC4090*

1

1.2

500

4.35 to 5.5 USB, 6-38, 60 Max Wall

Linear

Timer + C/10

215mΩ, (<50mΩ Opt.)

3x6 DFN-22

LTC4090-5

1

1.2

500

4.35 to 5.5 USB, 6-36, 60 Max Wall

Linear

Timer + C/10

215mΩ, (50mΩ Opt.)

3x6 DFN-22

LTC4067

1

1.25

500

4.35 to 5.5, 13 OVP

Linear

Timer + C/10

200mΩ, (<50mΩ Opt.)

3x4 DFN-12

LTC4066/-1†

1

1.5

500

4.35 to 5.5, USB + Wall Inputs

Linear

Timer + C/x

50mΩ

4x4 QFN-24

LTC4085 /-1†/-3^/-4^

1

1.5

500


Linear

Timer + C/10

215mΩ, (<50mΩ Opt.)

3x4 DFN-14

LTC4088/-1/-2*

1

1.5

700

4.35 to 5.5

Switch Mode

Timer + C/x

180mΩ, (<50mΩ Opt.)

3x4 DFN-14

LTC4098/-1*†

1

1.5

700

4.35 to 5.5 USB, 66 OVP, Switch Mode Wall = 5V Adapter or Buck High-V

Timer + C/x

180mΩ, (<50mΩ Opt.)

3x4 QFN-20

LTC4098-3.6*#

1

1.5

700

4.35 to 5.5 USB, 66 OVP, Switch Mode Wall = 5V Adapter or Buck High-V

Timer + C/x

180mΩ, (<50mΩ Opt.)

3x4 QFN-20

LTC4160/-1*†§

1

1.5

700

4.35 to 5.5 USB, 66 OVP

Switch Mode

Timer + C/x

180mΩ, (<50mΩ Opt.)

3x4 QFN-20

LTC4099

1

1.5

700

4.35 to 5.5 USB, 66 OVP

Switch Mode

Timer + C/x

180mΩ, (<50mΩ Opt.)

3x4 QFN-20

LTC4155*§**

1

3.5

700

4.35 to 5.5 USB, 77 OVP

Switch Mode

Timer + C/x

180mΩ

4x5 QFN-28

LTC4156*§**#

1

3.5

700

4.35 to 5.5 USB, 77 OVP

Switch Mode

Timer + C/x

180mΩ

4x5 QFN-28

*‡

* Bat-Track Adaptive Output Control, ^ 3.95V Cell Voltage, † 4.1V Cell Voltage, ‡ I2C Controlled, Selectable 4.1V/4.2V Float Voltage, § USB On-The-Go, # For 1-cell Lithium Iron Phosphate (LiFePO4) Batteries

17

18


Supercapacitor

Supercapacitor/Capacitor Chargers and Backup Power ICs Supercapacitors, capacitors with up to 100s of farads in value, are emerging as an alternative to batteries in applications where the importance of power delivery trumps that of total energy storage. Supercapacitors have a number of advantages over batteries that make them a superior solution when short-term high power is needed, such as in power ride-through applications. These advantages include lower effective series resistance (ESR) and enhanced durability in the face of repeated charging. Linear Technology offers a portfolio of linear, switching and switched-capacitor ICs designed to charge supercapacitors (also known as ultracapacitors) and capacitors. These devices offer input or output current limiting, automatic cell balancing and a range of protection features that make them uniquely suited to supercap charging. LTC3350: High Current Supercapacitor Backup Controller and System Monitor

High Current Supercapacitor Charger and Backup Supply ICHG (STEP-DOWN)

Features • High Efficiency Synchronous Step-Down CC/CV Charging of One to Four Series Supercapacitors •

Step-Up Mode in Backup Provides Greater Utilization of Stored Energy in Supercapacitors

•

14-Bit ADC for Monitoring System Voltages/ Currents, Capacitance and ESR

VOUT

VIN INFET VOUTSP VOUTSN PFI OUTFB

OUTFET

Active Overvoltage Protection Shunts

•

Internal Active Balancers—No Balance Resistors

•

VIN: 4.5V to 35V, VCAP(n): Up to 5V per Capacitor, Charge/Backup Current: 10+A

•

Programmable Input Current Limit Prioritizes System Load Over Capacitor Charge Current

•

Dual Ideal Diode PowerPath Controller

•

All NFET Charger Controller and PowerPath Controller

VOUT 2V/DIV

Compact 38-Lead 5mm × 7mm QFN Package

VCAP 2V/DIV

VOUT

VIN 2V/DIV

VCAP

Topology

ICAP VCAP CAP4

I2C

10F

CAP3

VCAP

10F

CAP2

10F

CAP1

10F

CAPRTN CAPFB

VIN

0V

Servers/Mass Storage/High Availability Systems

Part Number

SW BGATE

PBACKUP = 25W

Applications • High Current 12V Ride-Through UPS •

LTC3350

VCAP > VOUT (DIRECT CONNECT)

VCAP < VOUT (STEP-UP)

TGATE

•

•

IBACKUP

400ms/DIV BACK PAGE APPLICATION CIRCUIT

Backup Application

Input Voltage (V)

VOUT VCAP (max) (V)

Storage Element

Quiescent Current (µA)

Charge Current

PowerPath Control

Automatic Balancing

Supercap Overvoltage Protection

Package

Supercapacitor Chargers LTC3225/-1

Charge Pump - Boost

2.8-5.5

5.5

2 SCap

20

150mA

–

~***

~

2x3 DFN-10

LTC3226

Charge Pump - Boost + 2 LDOs

2.5-5.5

5.5

2 SCap

20

360mA

~

~***

~

3x3 QFN-16

LTC3625/-1

Switching Buck & Boost

2.7-5.5

5.5

2 SCap

23

1A*

–

~***

~

3x4 DFN-12

LTC4225

Linear

2.7-5.5

5.5

2 SCap

20

1A

–

~

~

3x3 DFN-12 MSOP-12

LTC3355

Buck + LDO + Charger + Boost Backup

3-20

5

1 SCap

120

1A

~

~

~

4x4 QFN-29

LTC3110

Bi-Dir Buck-Boost

1.71-5.25

5.5

1-2 SCap

48

2A

–

~

~


LTC3128

Buck-Boost

1.73-5.5

5.5

1-2 SCap

600

3A

–

~

~


LTC3350

Buck Charger, Boost Backup, Balancer + OVP, Health Monitor

4.5-35

VIN

1-4 SCap

4mA

10A+

~

~

~

5x7 QFN-38

LTC3643

Bi-Dir Boost Charger/ Buck Backup

3-17

up to 40V

Electrical Cap

400

2A

~

n/a

–

3x5 QFN-24

LTC4040

Buck Charger + Boost Backup

3.5-5.5

5

Li-Ion LifePO4

40

2.5A

~

n/a

~

4x5 QFN-24

* in 2-inductor circuit; 500mA in 1-inductor configuration ** ideal diode VIN to VOUT *** while charging


Supercapacitor

LTC3128: 3A Monolithic Buck-Boost Supercapacitor Charger and Balancer with Accurate Input Current Limit Features • ±2% Accurate Average Input Current Limit Programmable Up to 3A •

Programmable Maximum Capacitor Voltage Limit

•

Active Charge Balancing for Fast Charging of Unmatched Capacitors

•

Charges Single or Stacked Capacitors

•

VIN Range: 1.73V to 5.5V

•

VOUT Range: 1.8V to 5.5V

•

<2μA Quiescent Current from VOUT When Charged

•

Output Disconnect in Shutdown: <1μA IQ Shutdown

•

Power Good Comparator

•

Power Failure Indicator

•

Thermally Enhanced 20-Lead (4mm × 5mm × 0.75mm) QFN and 24-Lead TSSOP Package

Applications • Supercapacitor Based Backup Power •

Memory Backup

•

Servers, RAID, RF Systems

•

Industrial, Communications, Computing

Wide VIN (3A Programmed Input Current) to 4.2V 3.3µH SW1 1.7V TO 5.5V UP TO 3.0A

10µF 10µF

SW2

VOUT = 4.2V

VOUTP RSENP VOUTS RSENS LTC3128 VIN MID RUN PFI FB PFO PGOOD MAXV PROG GND 127k

1.87M

C1b 940mF

470pF

3.57k

301k

C1: Murata DMF3Z5R5H474M3DTA0

Stacked Output Capacitors Charging Waveform

VOUT 2.0V/DIV MID 2.0V/DIV IIN 2.0A/DIV ILOAD 2.0A/DIV 2 SECONDS/DIV

LTC3643: Bi-Directional Boost Charger/Buck Backup

LTC4040: Buck Charger and Boost Backup

C1a 940mF

C1

19

20


Lithium-Ion/Polymer

NiMH/NiCd

LiFePO4

Multichemistry

Lead-Acid

Smart Battery Chargers Our smart battery chargers offer true plug-and-play operation,

LTC1760: Dual Smart Battery System Manager

independent of chemistry and cell configuration, built-in safety features, DC IN

reliable battery detection and automatic charge management.

SYSTEM LOAD

LTC1760 SMBus (HOST)

SafetySignal 1 SMBus 1

LTC1760:

SafetySignal 2


SMART BATTERY

SMBus 2

Dual Battery Charger/Selector System Architecture

LTC4100: Smart Battery Charger Controller

DCIN 3V TO 5.5V

1.21k

13.7k

17 11 6

CHGEN

10

ACP

7 9 8 15 16 13 1.13k

14 10k

20

LTC4100 VDD

DCIN

DCDIV

INFET

CHGEN

CLP

ACP

CLN

SMBALERT

TGATE

SCL

BGATE

SDA

PGND

THB

CSP

THA

BAT

ILIM

VSET

VLIM

ITH

IDC

GND

5 4

5k

24

SYSTEM LOAD

23

SMART BATTERY

1 3 2 21 22 18 19 12

6.04k

54.9k

SafetySignal

SMBALERT# SMBCLK

SMBCLK

SMBDAT

SMBDAT

SMBus Smart Battery Charger Controller

Part Number


VBAT Range (V)

Standalone

Serial Bus Type

Single or Dual Battery Pack

Float Voltage Accuracy

Safety Limits

AC Present Output

Charger On Status

Thermistor Interface

Package

SMBus/SPI Battery Chargers (Controllers) LTC4110

3

3.5 to 18

~

SMBus 1.1

Single *

0.5%

–

~

~

~

5x7 QFN-38

LTC4100

4

3.5 to 26

~

SMBus 1.1

Single

0.8%

~

~

~

~

SSOP-24

LTC4101

4

2.7 to 4.2

~

SMBus 1.1

Single

0.8%

~

~

~

~

SSOP-24

LTC1760

4

3.5 to 28

~

SMBus 1.1

Dual

0.2%

~

~

~

~

TSSOP-48

LTC1759

8

3 to 23

~

SMBus 1.0

Single

1%

~

–

~

~

SSOP-36

LTC1960

8

6 to 28

–

SPI

Dual

0.8%

–

–

–

–

5x7 QFN-38, SSOP-36

* Scalable


NiMH/NiCd

NiMH and NiCd Battery Chargers Our nickel battery chargers reduce component count, speed design

LTC4060:

LTC4011:

and allow fast, accurate and reliable charging of both NiMH and



NiCd cells.

LTC4011: High Efficiency 4A Standalone Switch Mode Battery Charger with Analog INFET Control

LTC4060: Standalone 2A Linear NiMH/NiCd Fast Battery Charger VIN = 5V

330Ω “CHARGE”

VCC SHDN

ACP

CHRG

SENSE

NTC

DRIVE

LTC4011

LTC4060

NTC

698Ω

PROG

BAT

ARCT

TIMER

SEL0

CHEM

SEL1

PAUSE GND

+

NiMH BATTERY

1.5nF

2-Cell, 2A Standalone NiMH Fast Charger with Optional Thermistor and Charge Indicator

Part Number

Topology

Number of Battery Cells* (Series)


2A NiMH Battery Charger

Input Voltage (V)

Charge Termination


Endof-Charge Signal

AC Present Signal


Package (mm x mm)

NiMH/NiCd Battery Chargers – Standalone LTC4060

Linear

1–4

2

4.5 to 10

-dV, t, V, T

–

~

~

~

3x5 DFN-16, TSSOP-16

LTC4010

Synchronous Step-Down

1 – 16

4

4.5 to 34

-dV, dT/dt, T, t

–

~

~

~

TSSOP-16E


1 – 16

4

4.5 to 34

-dV, dT/dt, T, t

–

~

~

~

TSSOP-20E

2.4 to 29

External µC

~

–

–

–

SO-8

External µC

~

–

–

–


External µC

~

–

–

–

DD Pak, TO-220

–

–

–

TSSOP-20, SSOP-28

†

LTC4011

NiMH/NiCd Battery Chargers – Non-Standalone LT1512 LT1510 LT1513

SEPIC Step-Down SEPIC

1 – 12 1 – 12 1 – 12

0.8 1 1.6

7 to 29 2.4 to 29

LT1769

Step-Down

1 – 12

2

7 to 29

External µC

~

LT1511

Step-Down

1 – 12

3

7 to 29

External µC

~

–

–

–

SO-24

LTC4008


4 – 14

4

6 to 28

External µC

–

~

~

~

SSOP-28

LTC4009/ -1/-2


2 – 14

4

6 to 28

External µC

–

~

~

–

4x4 QFN-20

LTC4012/ -1/-2/-3†


2 – 14

4

6 to 28

External µC

–

~

~

–

4x4 QFN-20

LT1505


1–12

8

6.7 to 26

External µC

–

~

–

–

SSOP-28

LTC1960

Step-Down

4–16

8

6 to 28

External µC, SPI

–

–

–

–

5x7 QFN-38, SSOP-36

NiMH/NiCd Battery Chargers – Smart Chargers (SMBus) LTC4110

Synchronous Flyback

up to 10

3

6 to 20

Smart Battery, External µC

–

–

~

~

5x7 QFN-38

LTC4100

Step-Down

1–13

4

6 to 28


–

–

~

~

SSOP-24

LTC4101

Step-Down

2–3

4

6 to 28


–

–

~

~

SSOP-24

LTC1759

Step-Down

1–13

8

11 to 24


–

–

~

~

SSOP-36

LTC4079

Linear

up to 60V

.25

2.7 to 60V

Adj. Timer or C/10

~

~

–

~

3x3 DFN-10

*Based on Maximum Cell Voltage of 1.8V, † Includes PowerPath Control

21

22


Lithium-Ion/Polymer

Linear Li-Ion/Polymer Battery Chargers We produce a comprehensive line of high performance battery chargers for any rechargeable battery chemistry, including lithium-ion, lithium-polymer, lead-acid and nickel-based. Our linear battery charger ICs are completely autonomous in operation and offer many standard features for battery safety and management, including on-chip battery preconditioning, status signaling, thermal regulation and NTC thermistor interface.

LTC4079: 60V, 250mA Linear Charger with Low Quiescent Current

9V TO 60V

IN 1µF

BAT

8.4V 1.54M

LTC4079 EN

FB

CHRGF

BG

249k PROG

NTCBIAS

TIMER

NTC

3.01k

10k

+

GND T 10k

Li-Ion

Charging a Backup Battery

LTC4079: Actual Size Demo Circuit

LTC4065/A: Standalone 750mA Li-Ion Battery Charger in 2x2 DFN

VIN 4.3V TO 5.5V C1 1µF R2* 1Ω

Standalone Li-Ion Charger

500mA R1 510Ω

VCC

BAT

LTC4065 CHRG PROG EN

GND

+ R3 2k

4.2V Li-Ion BATTERY

LTC4065: Actual Size Demo Circuit


Lithium-Ion/Polymer

Linear Li-Ion/Polymer Battery Chargers (continued) Number of Battery Cells (Series)

Part Number


Input Voltage (V)

Cell Type



Package (mm x mm)

0.15

4.25 to 6.5

Li-Ion/Poly

~

C/10

ThinSOT™

Linear Li-Ion/Polymer Battery Chargers LTC4054L

1

LTC1734L

1

0.18

4.55 to 8

Li-Ion/Poly

External

External μC

ThinSOT

LTC4065L/X

1

0.25

3.75 to 5.5

Li-Ion/Poly

~

Timer + C/10

2x2 DFN-6

LTC4079

14

0.25

2.7 to 60

Li-Ion/Poly, Ni, SLA

~

Timer

3x3 DFN-10

LTC4080*/X* ¶

1

0.5

3.75 to 5.5

Li-Ion/Poly

~

Timer + C/10


LTC4081*

1

0.5

3.75 to 5.5

Li-Ion/Poly

~

Timer + C/10

3x3 DFN-10

LTC4056*

1

0.7

4.5 to 6.5

Li-Ion/Poly

External

Timer

ThinSOT

LTC1734

1

0.7

4.55 to 8

Li-Ion/Poly

External

External μC

ThinSOT

LTC4065*

1

0.75

3.75 to 5.5

Li-Ion/Poly

~

Timer + C/10

2x2 DFN-6

LTC4065-4.4*

1

0.75

3.75 to 5.5

Li-Ion/Poly

~

Timer + C/10

2x2 DFN-6

LTC4065A*

1

0.75

3.75 to 5.5

Li-Ion/Poly

~

Timer + C/10

2x2 DFN-6

LTC4069*

1

0.75

3.75 to 5.5

Li-Ion/Poly

~

Timer + C/10

2x2 DFN-6

~

Timer + C/10

2x2 DFN-6

~

C/10

ThinSOT

LTC4069-4.4*

1

0.75

3.75 to 5.5

Li-Ion/Poly

LTC4054*/X* ¶

1

0.8

4.25 to 6.5

Li-Ion/Poly

LTC4057*

1

0.8

4.25 to 6.5

Li-Ion/Poly

LTC4059*

1

0.9

LTC4059A*

1

0.9

¶

1

LTC4068*/X* ¶

1

LTC4058*/X* LTC4075*/X*

¶

LTC4075HVX*

¶

~

External μC

ThinSOT

3.75 to 8

Li-Ion/Poly, Ni

‡

~

External μC

2x2 DFN-6

3.75 to 8

Li-Ion/Poly, Ni ‡

~

External μC

2x2 DFN-6

0.95

4.25 to 6.5

Li-Ion/Poly

~

C/10

3x3 DFN-8

0.95

4.25 to 6.5

Li-Ion/Poly

~

C/x

3x3 DFN-8

1

0.95

4.3 to 8

Li-Ion/Poly

~

C/x

3x3 DFN-10

1

0.95

4.3 to 6, 22 max

Li-Ion/Poly

~

C/x

3x3 DFN-10

LTC4078*/X* ¶

1

0.95

4.3 to 6, 22 max

Li-Ion/Poly

~

C/x

3x3 DFN-10

LTC4076*

1

0.95

4.3 to 8

Li-Ion/Poly

~

C/x

3x3 DFN-10

LTC4077*

1

0.95

4.3 to 8

Li-Ion/Poly

~

C/10

3x3 DFN-10

LTC3550-1*

1

0.95

4.3 to 8

Li-Ion/Poly

~

C/x

3x5 DFN-16

LTC3550*

1

0.95

4.3 to 8

Li-Ion/Poly

~

C/x

3x5 DFN-16

LTC3552-1*

1

0.95

4.25 to 8

Li-Ion/Poly

~

C/x

3x5 DFN-16

LTC3552*

1

0.95

4.25 to 8

Li-Ion/Poly

~

C/x

3x5 DFN-16

LTC4095*

1

0.95

4.3 to 5.5

Li-Ion/Poly

~

Timer + C/10

2x2 DFN-8

LTC4064*

1

1.0

4.25 to 6.5

Li-Ion/Poly

~

Timer + C/10

MSOP-10E

LTC4061*

1

1.0

4.5 to 8

Li-Ion/Poly

~

Timer + C/x

3x3 DFN-10

LTC4061-4.4*

1

1.0

4.5 to 8

Li-Ion/Poly

~

Timer + C/x

3x3 DFN-10

LTC4062*

†

1

1.0

4.3 to 8

Li-Ion/Poly

~

Timer + C/x

3x3 DFN-10

LTC4063* §

1

1.0

4.3 to 8

Li-Ion/Poly

~

Timer + C/x

3x3 DFN-10

1

1.2

4.25 to 5.5

Li-Ion/Poly

~

C/x

3x3 DFN-10

LTC4097*

1

1.2

4.25 to 5.5

Li-Ion/Poly

~

C/x

2x3 DFN-12

LTC4053*

1

1.25

4.25 to 6.5

Li-Ion/Poly

~

Timer + C/10


LTC4052

~

Timer + C/10

MSOP-8E

~

Timer + C/10

MSOP-10E

LTC4096*/X*

¶

#

1

1.3

4.5 to 10

Li-Ion/Poly

LTC1733

1

1.5

4.5 to 6.5

Li-Ion/Poly

LTC1731

1, 2

1.5

4.5 to 12

Li-Ion/Poly

External

Timer + C/10

MSOP-8, S0-8

LTC1732

1, 2

1.5

4.5 to 12

Li-Ion/Poly, Ni ‡

External

Timer + C/10

MSOP-10

* USB 2.0 #

Compatible, †

Pulse Charger

Onboard

Comparator, ‡

Constant-Current Mode (Voltage Mode

Disabled), §

Onboard

LDO, ¶ “X” (No Trickle

Charge) Versions Useful when the System Load Exceeds the Trickle Charge Current at Very Low Battery Voltages

23

24


Lithium-Ion/Polymer

4.1V/Cell Battery Float Voltage Our 4.1V per cell float voltage chargers improve battery life and high temperature safety margin by accurately charging the battery to a level slightly below full charge.

Part Number



Input Voltage (V)

Battery Charger Type

USB 2.0 Compatible

Interface to High Voltage Buck

PowerPath Control

Integrated DC/DC Converters

Package (mm x mm)

Linear and Switch Mode Battery Chargers, Power Managers, Smart Battery Chargers and PMICs—4.1V/Cell Float Voltage LTC4070/71

1

0.05¶

Unlimited

Shunt

–

–

–

–

2x3 DFN-8, MSOP-8E

LTC4079

SLA, 1-14 Li-Ion, 1-50 Ni

0.25

2.7 to 60

Linear

–

–

–

–

3x3 DFN-10

LTC4065L-4.1

1

0.25

3.7 to 5.5

Linear

–

–

–

–

2x2 DFN-6

LTC4121

SLA, 1-5 LiFePO4 1-4 Li-Ion

0.4

4.3 to 40

Switch Mode

–

–

–

–

3x3 QFN-16

LTC3455-1

1

0.5

2.7 to 5.5

Linear

~

–

~

2 Bucks

4x4 QFN-24

LTC1734-4.1

1

0.7

4.55 to 8

Linear

~

–

–

–

ThinSOT

LTC3559-1

1

0.95

4.3 to 5.5

Linear

~

–

–

2 Bucks

3x3 QFN-16

LTC4055-1

1

1

4.3 to 5.5

Linear

~

–

~

–

4x4 QFN-16

LTC4064 (4.0V)

1

1

4.25 to 6.5

Linear

~

–

–

–

MSOP-10E

LTC4089-1

1

1.2

6 to 36

Linear

~

–

~

–

3x6 DFN-22

LTC1733 ‡

1

1.5

4.5 to 6.5

Linear

~

–

–

–

MSOP-10E

LTC4066-1

1

1.5

4.3 to 5.5

Linear

~

–

~

–

4x4 QFN-24, 4x4 QFN-24

LTC4085-1

1

1.5

4.35 to 5.5

Linear

~

–

~

–

3x4 DFN-14

LTC3557-1

1

1.5

4.35 to 5.5

Linear

~

~

~

3 Bucks, 1 LDO

4x4 QFN-28 4x7 QFN-44

LTC3577-1/-4

1

1.5

4.35 to 5.5

Linear

~

~

~

3 Bucks, 2 LDOs, 10-LED Boost

LTC3576-1

1

1.5

4.35 to 5.5

Bat-Track Linear

~

~

~

3 Bucks, 1 LDO

4x6 QFN-38

LTC3555-3

1

1.5

4.35 to 5.5

Bat-Track Linear

~

–

~

3 Bucks, 1 LDO

4x5 QFN-28

LTC3586-1

1

1.5

4.35 to 5.5

Bat-Track Linear

~

–

~

1 Boost, 1 Buck-Boost, 4x6 QFN-38 2 Bucks, 1 LDO

LTC4098-1

1

1.5

4.35 to 5.5

Bat-Track Linear

~

~

~

–

3x4 QFN-20

LTC4099+

1

1.5

4.35 to 5.5

Bat-Track Linear

~

~

~

–

3x4 QFN-20

LTC4160-1

1

1.5

4.35 to 5.5

Bat-Track Linear

~

–

~

–

3x4 QFN-20

LTC1731-4.1/-8.2

1/2

2

4.5 to 12

Linear

–

–

–

–

MSOP-8/SO-8

LTC1732-4

1, 2

2

4.5 to 12

Linear

–

–

–

–

MSOP-10

LTC4050-4.1/8.2

1

2

4.5 to 12

Linear

–

–

–

–

MSOP-10

LTC4001-1

1

2

4 to 5.5

Switch Mode

–

–

–

–

4x4 QFN-16

LT3650-4.1§/8.2#

1, 2

2

4.75 to 32

Switch Mode

–

–

–

–


LTC1980†

1, 2

2

4.1 to 12

Switch Mode

–

–

–

–

SSOP-24

LTC4110† *

1–4

3

6 to 20

Switch Mode/ Flyback

–

–

~

–

5x7 QFN-38

LT3651-4.1/8.2

1/2

4

–

–

–

–

5x6 QFN-36

1–3/1–4

2

4.8/9 to 32 4.95 to 32§

Switch Mode

LT3652/HV

Switch Mode

–

–

–

–


LTC4007/-1

3, 4

4

6 to 28

Switch Mode

–

–

~

–

SSOP-24

LTC4100† *

2–6

4

6 to 28

Switch Mode

–

–

~

–

SSOP-24

LTC4101† *

1

4

6 to 28

Switch Mode

–

–

~

–

SSOP-24

LTC4008†

2–6

4

6 to 28

Switch Mode

–

–

~

–

SSOP-20

LTC4009† /-1

1–4

4

6 to 28

Switch Mode

–

–

–

–

4x4 QFN-20

LTC4012† /-1/-3

1–4

4

6 to 28

Switch Mode

–

–

~

–

4x4 QFN-20

LTC1760† *

2–6

4

6 to 28

Switch Mode

–

–

~

–

TSSOP-48

LTC1960† *

2–6

8

6 to 28

Switch Mode

–

–

~

–

5x7 QFN-38, SSOP-36

LTC4020


20+

4.5 to 55

Switch Mode

–

–

~

–

5x7 QFN-38

* I2C Controlled, † Programmable, ‡ SEL Pin = OV Programs for 4.1V or 4.2V, § 7.5V Start-up Voltage for 1-Cell Operation, # 11.5V Start-up Voltage, ¶ 500mA with External PFET, Battery Pack Protection


Lithium-Ion/Polymer

Low Current/Coin Cell Battery Chargers Our coin cell battery chargers enable highly accurate charging of low

LTC4054L:

capacity, charge-sensitive coin cells used in thin, compact devices


such as Bluetooth headsets and hearing aids.

LTC4054L: 150mA Standalone Li-Ion Battery Charger for Coin Cells

LTC4065L: 250mA Standalone Linear Li-Ion Battery Charger in 2mm x 2mm DFN

VIN 4.5V TO 6.5V

100mA

VIN 4.3V TO 5.5V

1µF

VCC R1 510

VCC

BAT LTC4054L-4.2 LT4351 PROG GND

BAT

LTC4065L

+

CHRG PROG

90mA

EN

GND

R3 2k

Li-Ion 1.69k

COIN

4.2V Li-Ion BATTERY

CELL

Standalone Li-Ion Charger

90mA Li-Ion Coin Cell Charger

100

70

CONSTANT VOLTAGE

4.2 4.1

60

4.0

50

3.9

40

3.8

30

3.7

20 10

VCC = 5V O JA = 130°C/W RPROG = 1.69k TA = 25°C

B ATTERY VO LTA G E ( V )

CHARGE CURRENT (mA)

80

100

4.3

Charge Current Range (mA)

60

4.1 3.9

CHRG TRANSITION

50 40

3.7

30 20

3.5

10 0

CHARGE TERMINATION

3.5

VCC = 5V RPROG = 2k 0

0.5

1

1.5 2 2.5 3 TIME (HOURS)

3.5

4

4.5

3.3

LTC4065L Complete Charge Cycle

LTC4054L Complete Charge Cycle

Part Number

CONSTANT VOLTAGE

70

3.6

3.4 0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25 TIME (HOURS)

4.3

90 CONSTANT CURRENT 80

B ATTERY VO LTA G E ( V )

CONSTANT CURRENT

CHARGE CURRENT (mA)

90

0

110

4.4

Input Voltage (V)

Battery Charger Type

Standalone


Thermal Regulation


Package (mmxmm)

Coin Cell Li-Ion Battery Chargers LTC4070

0.001-50†

Unlimited

Shunt

~

~

–

~

2x3 DFN-8 MSOP-8E

LTC4071

0.001-50

Unlimited

Shunt

~

~

–

~

2x3 DFN-8 MSOP-8E

LTC4054L

10-150

4.25 to 6.5

Linear

~

C/10

~

~

ThinSOT

LTC1734L

10-180

4.55 to 8

Linear

–

–

–

External

ThinSOT

LTC4079

10-250

2.7 to 60

Linear

–

Timer

–

–

3x3 DFN-10

LTC4065L/LX* 15-250

3.75 to 5.5

Linear

~

Timer + C/10

~

~

2x2 DFN-6

LTC4059/A

3.75 to 8

Linear

–

–

~

~

2x2 DFN-6

90-900

* “X” (No Trickle Charge) Versions Useful when the System Load Exceeds the Trickle Charge Current at Very Low

Battery Voltages, †

500mA with ext PFET

25


Lithium-Ion/Polymer

PMICs: Switch Mode Power Manager-Based Our power management integrated circuits (PMICs) address battery

LTC3556:

charging and multiple system power rail needs for single-cell lithium-ion/


polymer portable products. Switch mode power management enables higher efficiency charging, less heat dissipation and compatibility with wall adapter, USB and high voltage power sources. LTC3556: High Efficiency Switch Mode USB Power Manager + Battery Charger + Dual Step-Down DC/DC + Buck-Boost + LDO

USB/WALL 4.5V TO 5.5V

•

Full Featured Li-Ion/Polymer Battery Charger

•

1.2A Maximum Charge Current

•

Internal 180mΩ Ideal Diode + External Ideal Diode Controller Powers Load in Battery Mode

•

Low No-Load Quiescent Current when Powered from BAT (<30µA)

OPTIONAL

0V

LTC3556

+

Li-Ion

T

CHARGE 3.3V/25mA

ALWAYS ON LDO

Programmable USB or Wall Current Limit (100mA/500mA/1A)

•

TO OTHER LOADS

USB COMPLIANT STEP-DOWN REGULATOR CC/CV BATTERY CHARGER

Features Power Manager • High Efficiency Switching PowerPath Controller with Bat-Track Adaptive Output Control

DUAL HIGH EFFICIENCY BUCKS

ENALL

HIGH EFFICIENCY BUCK-BOOST

SEQ I 2C

3

0.8V TO 3.6V/400mA

1

0.8V TO 3.6V/400mA

2 3

2.5V to 3.3V/1A

I2C PORT

RTC/LOW POWER LOGIC MEMORY CORE µP HDD I/O

PGOODALL

High Efficiency PowerPath Manager, Dual Buck, Buck-Boost and LDO

DC/DCs • Dual High Efficiency Step-Down DC/DCs (400mA/400mA I OUT) •

High Efficiency Buck-Boost DC/DC (1A IOUT)

700

•

All Regulators Operate at 2.25MHz

600

•

Dynamic Voltage Scaling on Two Buck Outputs

•

I C Control of Enables, MODE, Two VOUT Settings

CHARGE CURRENT (mA)

26

2

•

Low No-Load Quiescent Current: 20µA

•

Always-On, 3.3V/25mA LDO

•

Low Profile 4mm × 5mm 28-Pin QFN Package

Applications • HDD-Based MP3 Players, PMPs PNDs, DMB/DVB-H; Digital/Satellite Radio

•

Portable Industrial/Medical Products

•

Universal Remotes, Photo Viewers

•

Other USB-Based Handheld Products

Part Number

Number of Regulators

Input Voltage (V)

EXTRA CURRENT FOR FASTER CHARGING

500

500mA USB CURRENT LIMIT

400 300 200 100

•

BATTERY CHARGE CURRENT

0

VBUS = 5V 5X MODE BATTERY CHARGER PROGRAMMED FOR 1A 2.8

3.2 3.4 3.6 3.8 BATTERY VOLTAGE (V)

3

4

4.2

Battery Charge Current from USB

Buck(s) (IOUT)

Buck-Boost (IOUT)

Boost (IOUT)

LDO(s) (IOUT)

Li-Ion/ Polymer Charger

Max Charge Current (A)

Ideal Diode

Interface

Package (mm x mm)

4x4 QFN-24

Switch Mode PowerPath Management Integrated Circuits (PMICs) LTC3566

2

4.35 to 5.5

–

1A

–

3.3V/25mA

~

1.5

Int + Ext (Opt.)

Simple

LTC3567

2

4.35 to 5.5

–

1A

–

3.3V/25mA

~

1.5

Int + Ext (Opt.)

IC

2 2

LTC3555/-1/-3*

4

4.35 to 5.5

1A, 400mA x 2

–

–

3.3V/25mA

~

1.5

Int + Ext (Opt.)

IC

LTC3556

4

4.35 to 5.5

400mA x 2

1A

–

3.3V/25mA

~

1.5

Int + Ext (Opt.)

IC

2 2

4x4 QFN-24 4x5 QFN-28 4x5 QFN-28

LTC3576/-1*†

4

4.35 to 5.5, 1A, 400mA x 2 High-V, OVP

–

–

3.3V/20mA

~

1.5

Int + Ext (Opt.)

IC

4x6 QFN-38

LTC3586/-1*

5

4.35 to 5.5

1A

0.8A

3.3V/20mA

~

1.5

Int + Ext (Opt.)

Simple

4x6 QFN-38

400mA x 2

* 4.1V Battery Float Voltage, † See Page 27 for Compatible High Voltage Buck Regulators


Lithium-Ion/Polymer

PMICs: Linear Power Manager-Based Our power management integrated circuits (PMICs) address battery

LTC3577: Actual Size,

charging and multiple system power rail needs in single-cell lithium-ion/

Complete Solution

90 85

polymer portable products. Linear power management allows seamless

80 EFFICIENCY (%)

transition and manages power flow between input power sources such as a wall adapter, USB port, lithium battery and the system load. LTC3577/-1: Highly Integrated 6-Channel PMIC Features • Full Featured Li-Ion Charger/ PowerPath Controller with Instant-On Operation •

High Temperature Battery Voltage Reduction Improves Safety and Reliability

•

1.5A Maximum Charge Current with Thermal Limiting

•

Pushbutton On/Off Control with System Reset

•

Dual 150mA Current Limited LDOs

•

•

Triple Adjustable High Efficiency Step-Down Switching Regulators (600mA, 400mA, 400mA IOUT) 200mΩ Internal Ideal Diode Plus External Ideal Diode Controller Provides Low Loss PowerPath from Battery

Part Number


Bat-Track Control for External HV Buck DC/DCs

•

I2C Adjustable SW Slew Rates for EMI Reduction

•

Overvoltage Protection for USB (VBUS)/Wall Input

•

Integrated 40V Series LED Driver with 60dB Brightness and Gradation Control via I2C

65

Solution Size = 22mm x 15mm

VOUT

Portable Industrial/Medical Products

•


•


50

0

10

5

20

15

LED Driver Efficiency (10 LEDs)

HIGH VOLTAGE BUCK DC/DC

HV SUPPLY OPTIONAL

100mA/500mA 1000mA

USB

VOUT 0V

OVERVOLTAGE PROTECTION

Applications • PNDs, DMB/DVB-H; Digital/ Satellite Radio •

3.8V 3.6V 3.4V 3.2V

55

ILED (mA)

Small 4mm × 7mm 44-Pin QFN Package

Input Voltage (V)

70

60

•

•

75

CC/CV CHARGER

+

LTC3577/LTC3577-1 CHARGE

2

0.8V to 3.6V/150mA 0.8V to 3.6V/150mA

DUAL LDO REGULATORS

I2C PORT

SINGLE CELL Li-Ion

NTC

UP TO 10 LED BOOST

LED BACKLIGHT WITH DIGITALLY CONTROLLED DIMMING TRIPLE HIGH EFFICIENCY STEP-DOWN SWITCHING REGULATORS WITH PUSHBUTTON CONTROL

PB

0.8V to 3.6V/600mA 0.8V to 3.6V/400mA 0.8V to 3.6V/400mA

USB Plus HV Input Charger and Multichannel PMIC

Buck(s) (IOUT)

LDO(s)

Li-Ion/ Polymer Charger

Max Charge Current

PowerPath

Ideal Diode

Interface

Package (mmx mm)

Linear PowerPath Management Integrated Circuits (PMICs) LTC3553

2

4.35 to 5.5

200mA

150mA

~

500mA

~

~

–

3x3 QFN-20

LTC3554

2

4.35 to 5.5

200mA x 2

–

~

500mA

~

~

–

3x3 QFN-20

LTC3455

3


400mA, 600mA‡

Controller

~

500mA

~

–

–

4x4 QFN-24

LTC3557/-1§

4

2.7 to 5.5, USB, High-V Bat-Track (*)

600mA, 400mA x 2

3.3V/25mA

~

1.5A

~

Int + Ext (Opt.)

–

4x4 QFN-28

LTC3577/-3 LTC3577-1/-4§

6#

2.7 to 5.5, USB, High-V Bat-Track (*), OVP

800mA, 500mA x 2

2x150mA

~

1.5A

~

Int + Ext (Opt.)

–

4x7 QFN-44

LTC3677-3¶

6

2.7 to 5.5, USB, High-V Bat-Track (*), OVP

800mA, 500mA x 2

2x150mA

~

1.5A

~

Int + Ext (Opt.)

–

4x7 QFN-44

* See Table Below for Compatible High Voltage Buck Regulators, † Includes 50mA Hot Swap™ Controller, ‡ May be Increased to 1A with Additional Components, § 4.1V Battery Float Voltage, # Includes 10-LED Boost, ¶ No LED Driver

Part Number

Input Voltage, Maximum (V)

Efficiency (%)

ISW/IOUT (A)

Switching Frequency

Reference Voltage (V)

Inductor (µH)

Output Capacitor (µF)

Quiescent Current

ISD (µA)

Package (mmxmm)

*High Voltage Buck Regulators (Compatible with LTC3557, LTC3576 and LTC3577) LT3505

3.6-36, 40

>85

1.75 / 1.2

300k-3MHz

0.78

6.8

10-Ceramic

2mA

<2

3x3 DFN-8, MSOP-8E

LT3480

3.6-38, 60

>85

3/2

200k-2MHz

0.79

4.7

22-Ceramic

70µA

<1


LT3481

3.6-34, 36

>85

3.2 / 2

300k-2.8MHz

1.26

4.7

22-Ceramic

50µA

<1


LT3653

7.5-30, 60

>85

2 / 1.2

1.5MHz

n/a

4.7

10-Ceramic

2.8mA

n/a

2x3 DFN-8

27


Lithium-Ion/Polymer

PMICs: Linear Battery Charger (Battery-Fed) Our power management integrated circuits (PMICs) address battery

LTC3558:

charging and multiple system power rail needs in single-cell lithium

Actual Size Complete Solution

portable products. A high level of integration is offered in a small

100 95

ILOAD = 10mA

ILOAD = 1mA

85

footprint for a compact total solution size and ease-of-use. LTC3558: Linear USB Battery Charger with Buck-Boost and Buck Regulators

VOUT = 3.3V

90 EFFICIENCY (%)

28

Solution Size = 12mm x 11mm

80 ILOAD = 100mA

75 70

ILOAD = 400mA

65 60

Burst Mode OPERATION PWM MODE

55

Features Power Manager • Standalone USB Charger

50

2.7 3.0 3.3 3.6 3.9 4.2

PVIN2 (V)

•

Up to 950mA Charge Current Programmable via Single Resistor

•

HPWR Input Selects 20% or 100% of Programmed Charge Current

•


•

Internal Timer Termination

•

Bad Battery Detection

Buck-Boost Regulator Efficiency vs Input Voltage

USB (4.3V TO 5.5V) 1µF

2.25MHz Constant Frequency Operation

•

Power Saving Burst Mode® Operation

•

Low Profile 3mm × 3mm 20-Pin QFN Package

SD/Flash-Based MP3 Players Portable Industrial/Medical Products

•


•


•

Low Power Handheld Applications

PROG

+

LTC3558

10µF

4.7µH

3.3V AT 400mA

SWCD2 VOUT2

MODE EN1

121k

324k

EN2

10µF

649k 2.2µH

HPWR

22µF

33pF

FB2 15k

105k GND

10pF

324k

FB1 SWAB2

SUSP DIGITAL CONTROL

SINGLE Li-lon CELL (2.7V TO 4.2V) 1.2V AT 400mA

SW1

CHRG

Applications • PNDs, DMB/DVB-H; Digital/Satellite Radio •

PVIN2

NTC

•

•

BAT PVIN1

1.74k

Switching Regulators • 400mA Output Current per Regulator

VCC

EXPOSED PAD

330pF

10pF

VC2

USB Charger Plus Buck Regulator and Buck-Boost Regulator

Part Number


Maximum Charge Current (mA)

Input Voltage (V)

Buck(s) (IOUT)

Buck-Boost(s) (IOUT)

Li-Ion/Polymer Charger

PowerPath Topology

Package (mmxmm)

Power Management Integrated Circuits (PMICs), Charger-Fed LTC4080

1

500

2.7 - 4.5

300mA

–

~

–


LTC4081

1

500

2.7 - 4.5

300mA

–

~

–

3x3 DFN-10

LTC3550/-1

1

950

2.5 - 5.5

600mA

–

~

–

3x5 DFN-16

LTC3552/-1

2

950

2.5 - 5.5

400mA/800mA

LTC3558

2

950

3.0 - 4.2

400mA

LTC3559

2

950

3.0 - 4.2

400mA x 2

– 400mA –

~

–

3x5 DFN-16

~

–

3x3 QFN-20

~

–

3x3 QFN-16

B AT T E RY M A N A G E M E N T S O L U T I O N S

Ideal Diodes/PowerPath Controllers Our ideal diode devices provide a low loss, near “ideal” diode function. They feature much lower forward voltage drop and reverse leakage current than conventional Schottky diodes. This reduces power loss and eases thermal management while extending battery run time. LTC4413: Dual 2.6A, 2.5V to 5.5V Ideal Diodes in 3mm x 3mm DFN

ENBA


GND WALL ADAPTER (0V TO 5.5V)

2000

VCC

LTC4413

470k

ENBB

STAT

INB

OUTB

STAT IS HIGH WHEN BAT IS SUPPLYING LOAD CURRENT

1500 LTC4413 IOUT (mA)

LTC4413:

1000 1N5817

CONTROL CIRCUIT INA

500

OUTA

TO LOAD 0

BAT

0

200

100

300

400

VFWD (mV)

Monolithic Dual Ideal Diode

Part Number

Ideal Diode

External MOSFET

Integrated MOSFET

LTC4413 vs 1N5817 Schottky

Maximum Current (A)

Input Voltage (V)

Forward Voltage (mV)

Forward ON Resistance

Reverse Leakage Current (µA)

Supply Current (µA)

Package (mmxmm)

P-Channel PowerPath/Ideal Diode Controllers LTC4411

Single

P-Channel

~

1

2.6 to 5.5

28

140mΩ

1

35

ThinSOT

LTC4412

Single

P-Channel

–

2*

2.5 to 28

20

Controller

3

13

ThinSOT

LTC4412HV

Single

P-Channel

–

2*

2.5 to 36

20

Controller

3

13

ThinSOT

LTC4413/-1 †

Dual

P-Channel

~

2.6

2.5 to 5.5

28

100mΩ

1

20

3x3 DFN-10

LTC4413-2

Dual

P-Channel

~

2.6

2.5 to 5.5,13, OVP

28

100mΩ

1

20

3x3 DFN-10

LTC4414

Single

P-Channel

–

5-75*

3 to 36

22

Controller

3

33

MSOP-8

LTC4415

Dual

P-Channel

~

4

1.7 to 5.5

15

50mΩ

1

44

3x5 DFN-16, MSOP-16

LTC4416/-1

Dual

P-Channel

–

5-75*

3.6 to 36

22

Controller

3

70

MSOP-10

LTC4417

Triple

P-Channel

–

5-75*

2.5 to 36

*

Controller

n/a

28

4x4 QFN-24, SSOP-24

†

* Depends on MOSFET

Selection, †

High Speed Version

LTC4352: MOSFET Diode-OR Controller Part No. Q2 Si7336ADP

TO LOAD

0.15µF

5V

5V 1k

VIN

CPO

SOURCE

UV 1k 1% OV

GND

OUT FAULT

LTC4352

3.09k 1%

GATE

External MOSFET

Maximum Current (A)

Input Voltage (V)

Package (mmxmm)

N-Channel Power PowerPath/Ideal Diode Controllers

Q1 Si7336ADP

5V

31.6k 1%

Ideal Diode

D2

1k D1

FAULT

MOSFET ON

STATUS VCC

LTC4352

Single

N-Channel ≥5*

0 to 18

3x3 DFN-12, MSOP-12

LTC4357

Single

N-Channel ≥5*

9 to 80

2x3 DFN-6, MSOP-8

LTC4358

Single

N-Channel 5 (Internal)

9 to 26.5

4x3 DFN-14, TSSOP-16

LTC4359

Single

N-Channel ≥5*

4 to 80

2x3 DFN-6, MSOP-8

LTC1473

Dual

N-Channel ≥5*

4.75 to 30

SSOP-16

LTC1473L Dual

N-Channel ≥5*

2.8 to 9

SSOP-16

LTC2952† Dual

N-Channel ≥5*

2.7 to 28

TSSOP-20, 4x4 QFN-20

LTC4353

N-Channel ≥5*

0 to 18

4x3 DFN-16, MSOP-16

Dual

0.1 µF REV

D1: GREEN LED LN1351C D2: RED LED LN1261CAL

5V Ideal Diode Circuit with Input Undervoltage and Overvoltage Protection

LTC4371

Dual

N-Channel ≥5*

–4.5 to >–100 3x3 DFN-10, MSOP-10 (Floating)

LTC4355

Dual

N-Channel ≥5*

9 to 80

4x3 DFN-14, SOIC-16

LTC1479

Triple

N-Channel ≥5*

6 to 28

SSOP-36

* Depends on MOSFET Selection, † Pushbutton PowerPath Controller with Supervisor

29

30


Active Balancing ICs Emerging electric vehicles (EV) and plug-in hybrid vehicles (PHEV) are demanding longer usable run time from their battery stacks. These stacks of batteries are typically made of battery modules, each with as many as 12 Li-Ion cells stacked in series, offering a 400V battery module. As the battery run time defines the very feasibility of these vehicles, maximizing battery capacity is of primary importance. Batteries can always be made larger to improve driving range but this increases the weight, size and cost of the vehicle. So the goal for automotive EV designers is to find ways to make the existing battery run longer. One effective method is to employ active balancing. Because EV batteries are stacked in series, the lowest capacity cell will limit the entire battery stack’s run time. Ideally, the batteries would be perfectly matched, but this is often not the case, and generally gets worse as the batteries age. Passive energy balancing offers no improved run time, as it dissipates the extra energy of the higher capacity batteries as heat to match the lowest one. Conversely, high efficiency active balancing redistributes the charge from the stronger cells (higher voltage) to the weaker cells. This enables the weaker cells to continue to supply the load during stack discharge, extending the vehicle’s range. It may also be beneficial to have onboard diagnostics for each cell within these modules to monitor temperature, voltage (state of charge) and internal impedance both for safety and long term reliability. Practical Example • Big batteries are expensive—they all degrade over time and lose capacity •

Low cost/refurbished cells have greater capacity mismatch

•

Increasing stack capacity with mismatched cells done in 2 ways: –– Use bigger batteries (solution cost ~ $1–$2 per A-hr per cell) –– Use active balancing

•

•

LTC3300-1 solution cost ~ $2–$3 per cell, depending on IBAL

•

LT8584 solution cost ~ $3.50–$4.50 per cell, depending on IBAL

Example, adding 10A-hrs of capacity costs: –– Bigger batteries: ~ $10–$20 per cell –– Active balancing: ~ $2–$3 per cell

•

Active balancing maximizes run time and allows fastest charge rates

LTC3300-1/-2 - High Efficiency/Addressable Bidirectional Multicell Battery Balancer The LTC3300-1 is a fault-protected controller IC for transformer-based bidirectional active balancing of multicell battery stacks. All associated gate drive circuitry, precision current sensing, fault detection circuitry and a robust serial interface with built-in watchdog timer are integrated. Each LTC3300-1 can balance up to six series-connected battery cells with an input common mode voltage up to 36V. Charge from any selected cell can be transferred at high efficiency to or from 12 or more adjacent cells. LTC3300-1 Offers • Highest energy recovery (max run time)

Features Bidirectional Synchronous Flyback Balancing of Up to Six Li-Ion or LiFePO4 Cells in Series

•

•

92% transfer efficiency, bidirectional operation

•

Fastest balancing time (min charge time)

•

Up to 10A Balancing Current (Set by External Components)

•

Up to 10A charge/discharge current, external power switches

•

•

Numerous safety features

Bidirectional Architecture Minimizes Balancing Time and Power Dissipation

•

Cost efficiency – 6-cell integration

•

Up to 92% Charge Transfer Efficiency

•

Stackable Architecture Enables >1000V Systems

•

Integrates Seamlessly with LTC6804-X Family of Battery Cell Monitor ICs

•

Uses Simple 2-Winding Transformers

•

1MHz Daisy-Chainable Serial Interface with 4-Bit CRC Packet Error Checking

•

High Noise Margin Serial Communication

•

Numerous Fault Protection Features

•

48-Lead Exposed Pad QFN & LQFP Packages

Applications • Electric Vehicles/Plug-in HEVs •

High Power UPS/Grid Energy Storage Systems

•

General Purpose Multicell Battery Stacks


LT8584 - 2.5A Monolithic Active Cell Balancer with Telemetry Interface

The LT8584 is a monolithic flyback DC/DC designed to actively balance high voltage stacks of batteries. The high efficiency of a switching regulator significantly increases the achievable balancing current while reducing heat generation. The LT8584 includes an integrated 6A/50V power switch, reducing the complexity of the application circuit. The device runs completely off the cell it is discharging, eliminating complicated biasing schemes. The LT8584 provides system telemetry including current, temperature and cell voltage when used with the LTC680x family of battery monitors. LT8584 Offers • High level of integration •

Numerous safety features, additional system monitoring MUX –– Measure IBAL for calculating “IR Drop Compensation,” “Coulomb tracking” –– Measure internal reference for BMS self-testing per channel

•

Simple to use: no additional software required for “Simple Mode” operation

•

High energy recovery

•

Fast balancing time

–– 82% charge transfer efficiency –– 2.5A discharge current, internal power switch Features 2.5A Typical Average Cell Discharge Current

• •

Integrated 6A/50V Power Switch

•

Integrates Seamlessly with LTC680x Family

•

Selectable Current and Temperature Monitors

•

Ultralow Quiescent Current in Shutdown

•

Engineered for ISO 26262 Compliant Systems

•

Isolated Balancing: –– Can Return Charge to Top of Stack –– Can Return Charge to Any Combination of Cells in Stack –– Can Return Charge to 12V Battery for Alternator Replacement

•

Can Be Paralleled for Greater Discharge Capability

LTC3305 Lead-Acid Battery Balancer

The LTC3305 balances up to four lead-acid batteries connected in series. All voltage monitoring, gate drive and fault detection circuitry is integrated. The LTC3305 is designed for standalone operation and does not require any external control circuitry. Summary of Features: LTC3305 •

Single IC Balances Up to Four 12V Lead-Acid Batteries in Series

•

All NFET Design

•

Stackable to Balance Larger Series Battery Packs

•

Standalone Operation Requires no External μP or Control Circuitry

•

Balancing Current Limited by External PTC Thermistor

•

Continuous Mode and Timer Mode

•

Programmable UV and OV Fault Thresholds

•

Programmable Termination Time and Termination Voltage

•

38-Lead TSSOP and 7mm × 7mm 48-Lead LQFP Packages

Applications • Active Battery Stack Balancing •

Electric and Hybrid Electric Vehicles

•

Failsafe Power Supplies

•

Energy Storage Systems

31


High Voltage Battery Stack Monitors for Battery Management Systems Applications • Passenger Automobiles (EV, HEV) •

Electric Bicycles (Motorcycles, Scooters)

Part Number

Primary Function

Measurement Error Max

Multichip Interface

Package

Comments

LTC6804-1

12 Cell Measurements

0.10%

isoSPI, Daisy-Chain

SSOP-48

3rd Generation: High Noise Immunity High Accuracy, 240µsec Conversion

LTC6804-2


0.10%

isoSPI, Addressable

SSOP-48

3rd Generation: High Noise Immunity High Accuracy, 240µsec Conversion

•

Commercial Vehicles (Buses, Trains)

•

Industrial Equipment (Forklifts, Trucks)

•

Marine (Boats, Submarines)

•

Mil/Aero (Planes, Satellites, Unmanned Vehicles)

LTC6803-1/3


0.25%

SPI, Daisy-Chain

SSOP-44

2nd Generation: High Noise Immunity, 0µA shutdown

•

Energy Storage Systems

LTC6803-2/4


0.25%

SPI, Addressable

SSOP-44

2nd Generation: High Noise Immunity, 0µA shutdown

LTC6802-1


0.25%

SPI, Daisy-Chain

SSOP-44

1st Generation: Superseded by the LTC6804 and LTC6803 for new designs

LTC6802-2


0.25%

SPI, Addressable

SSOP-44

1st Generation: Superseded by the LTC6804 and LTC6803 for new designs

LTC6801

12 Cell Fault Monitor

0.50%

Differential Clock Signals, Daisy-Chain

SSOP-36

Standalone Undervoltage/Overvoltage Monitor, Provides Redundancy

LTC6804: Next Generation Battery Stack Monitor

•

Stackable Architecture Supports 100s of Cells

•

Built-in isoSPI™ Interface

•

Delta-Sigma ADC With Frequency Programmable 3rd Order Noise Filter

•

Stackable BMS Architecture

2.5

240µs to Measure All Cells in a System

•

Synchronized Voltage and Current Measurement

•

Engineered for ISO26262 Compliant Systems

•

Passive Cell Balancing with Programmable Timer

•

General Purpose I/O for Digital or Analog Inputs, also Configurable for I2C Interface

•

4μA Sleep Mode Supply Current

•

48-Lead SSOP Package

Nominal Cell Voltage = 3.3V

2.0

+ 12s1p Li-Ion –

1.5

LTC6804

1.2mV Maximum Total Measurement Error

•

Total Measurement Error vs Temperature

1.0 TME (mV)

Features • Measures Up to 12 Battery Cells in Series

0.5 0 –0.5 –1.0 –1.5 –2.0

LTC6804

–2.5 –45

–20

5 30 55 TEMPERATURE (°C)

80

105

LTC6804

LTC6820: Noise Immune, Isolated, Bidirectional SPI Communications (isoSPI) Features • Supports LTC6804 High Voltage Battery Monitor •

1Mbps Isolated SPI Using Standard Transformers

•

Bidirectional Interface Over a Single Twisted Pair

•

Supports Cable Lengths Up to 100 Meters

•

Configurable for High Noise Immunity or Low Power

•

Ultralow, 2.5μA Idle Current

•

Interfaces with 1.8V to 5V Logic

•

16-Lead QFN and MSOP Packages

Isolated 2-Wire Communication MASTER µC SDO SDI SCK CS

REMOTE SLAVE IC

1.2

LTC6820 MSTR MOSI MISO SCK CS

CAT-5 ASSUMED

IP

1.0 120Ω

IM

100 METERS TWISTED PAIR

LTC6820 MSTR

SDI SDO SCK CS

Data Rate vs Cable Length

MOSI

IP

CS

0.8 0.6 0.4 0.2

120Ω

MISO SCK

DATA RATE (Mbps)

32

IM

0

1

10 CABLE LENGTH (METERS)

100


Battery Monitoring Devices By combining a voltage reference with a comparator, it is easy to

12 LITHIUM 40V CELL STACK

create accurate battery monitors. Linear Technology offers a number of combination devices with very low power and high accuracy voltage references. These products are available in many pin configurations to

+

10µF

+

1M INC2

LT6109-1

5V

+

pin count.

10k

RESET

LT6109: High Side Current Sense Amplifier with Reference and Dual Comparator

Description

2 EN/RST 4 OUTC1 3 OUTC2

INC1 V–

INC2

5

The LT6109 is an ideal choice for monitoring batteries. It includes a precision high side current sense amplifier, a dual comparator for monitoring current and/or voltage, and a voltage reference. As shown, it is simple to implement battery fault protection. In this example, the comparators monitor for overcurrent and undervoltage conditions. If either fault is detected, the battery will be immediately disconnected from the load. The latching comparator outputs ensure the battery stays disconnected until an outside source resets the LT6109 comparator output.

100k

R10 100 1 10 SENSEHI SENSELO 8 9 + OUTA V

0.1µF 13.3k

support a wide range of designs with minimum package footprint and

Part Number

IRF9640

0.1 +

0.8A OVERCURRENT 6 DETECTION 7

6.2V*

VOUT 9.53k 475

30V UNDERVOLTAGE DETECTION

100k 2N7000

*CMH25234B

Overcurrent and Undervoltage Battery Fault Protection

Supply Voltage (V)

Prop Delay (µs) Typ

Hysteresis (mV)


Package (mm x mm)

Comparator and Reference Combinations LT6700

Dual Comparators with 400mV Reference

1.4 to 18

18

6.5

10

SOT-23, 2x3 DFN-6

LT6700HV

36V Input/Output Dual Comparators and Reference

1.4 to 18

18

6.5

10

SOT-23

LT6700MP

Dual Comparators and Reference for –55°C to 150°C

1.4 to 18

18

6.5

10

2x3 DFN-6

LT6703

Single Comparator and Internal Reference

1.4 to 18

18

6.5

10

SOT-23, 2x2 DFN-3

LT6703HV

36V Input/Output Comparator and Reference

1.4 to 18

18

6.5

10

SOT-23

LTC1440

Ultralow Power Comparator with Reference

2 to 11

8

Adj

4

MSOP-8,SO-8, DIP-8, 3x3 DFN-8

LTC1441

Dual Ultralow Power Comparators with Reference

2 to 11

8

None

5.7

DIP-8, SO-8

LTC1442


2 to 11

8

Adj

5.7

DIP-8, SO-8

LTC1443

Quad Ultralow Power Comparators with Reference

2 to 11

4

None

8.5

DIP-16, SO-16, 4x5 DFN-16

LTC1444


2 to 11

4

Adj

8.5

DIP-16, SO-16, 4x5 DFN-16

LTC1445


2 to 11

4

Adj

8.5

DIP-16, SO-16, 4x5 DFN-16

LTC1540

Nanopower Comparator with Reference

2 to 11

50

Adj

0.7

MSOP-8, SO-8, 3x3 DFN-8

LTC1541

Combined Amplifier, Comparator and Reference

2.5 to 12.6

8

2.25

7.5


LTC1542

Micropower Amplifier and Comparator

2.5 to 12.6

8

2.25

5


LTC1842


2.5 to 11

4

Adj

5.7

SO-8

LTC1843


2.5 to 11

4

Adj

5.7

SO-8

LTC1998

High Accuracy Comparator with 1.2V Reference

1.5 to 5.5

150

Adj

3.5

SOT-23

LT6108

High Side Current Sense Amplifier with Reference and Comparator

2.7 to 60

3

10

650

MSOP-8, 2x3 DFN-8

LT6109

High Side Current Sense Amplifier with Reference and 2 Comparators

2.7 to 60

3

10

700

MSOP

LT6118

Current Sense Amplifier, Reference, and Comparator with POR

2.7 to 60

3

10

650

MSOP-8, 2x3 DFN-8

LT6119

Current Sense Amplifier, Reference, and 2 Comparators with POR

2.7 to 60

3

10

700

MSOP

TO LOAD

33

34


Special Functions/Battery Charger Support Devices LTC2943: Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement

LTC3335: Nanopower Buck-Boost DC/DC with Integrated Coulomb Counter

Features • Measures Accumulated Battery Charge and Discharge

Features • 680nA Input Quiescent Current (Output in Regulation at No Load)

•

3.6V to 20V Operating Range

•

1.8V to 5.5V Input Operationg Range

•

14-Bit ADC Measures Voltage, Current and Temperature

•

•

1% Voltage, Current and Charge Accuracy

Selectable Output Voltages of 1.8V, 2.5V, 2.8V, 3V, 3.3V, 3.6V, 4.5V, 5V

•

3mm x 3mm DFN-8 Package

•

Integrated Coulomb Counter Measures Accumulated Battery Discharge

•

±5% Battery Discharge Measurement Accuracy

1A LOAD

CHARGER

3.3V

1µF 2k

2k

LTC2943

2k

VDD

ALCC

µP

SDA

SENSE+ RSENSE 50mΩ SENSE–

SCL

+

GND

Part Number

Supply Voltage (V)

Max Shutdown Current (µA)

MULTICELL LI-ION

Measures Accumulated Charge & Discharge

Charge Accuracy (%)

Integrated RSENSE

Measures Current

Integrated Temperature Sensor

Interface

Package (mm x mm)

Battery Gas Gauges (Coulomb Counters) LTC4150

2.7 to 8.5

1.5

~

No Spec

–

–

–

2 μC I/O Pins

MSOP-10

LTC2941/-1

2.7 to 5.5

2

~

1

– /~

–

–

I2C/SMBus

2x3 DFN-6, MSOP-8

~

I2C/SMBus

2x3 DFN-6

~

I2C/SMBus

3x3 DFN-8

~

I2C/SMBus

3x3 DFN-8

LTC2942/-1 LTC2943/-1 LTC2944

2.7 to 5.5 3.6 to 20 3.6 to 60

2 25 50

~ ~ ~

LTC4231: Micropower Hot Swap Controller Features • Enables Safe Battery or Board Insertion and Removal •

Low 4µA Quiescent Current, 0.3µA in Shutdown

•

Filtered Circuit Breaker with 1µs Fast Current Limit

•

Overvoltage and Undervoltage Protection

1 1 1

– /~ – /~ –

~ ~ ~

Battery Hot Swap with Reverse Protection SMAJ24CA

22.5mΩ

•

2.7V to 36V Operating Range

•

Reverse Battery Protection to –40V

•

Controls Single or Back-to-Back N-Channel MOSFETs

•

MOSFET On Status Output

•

3mm x 3mm QFN-12 and MSOP-12 Packages

VOUT 24V 2A

Si5410DU

220µF SENSE 1020k

–– Adjustable Undervoltage Hysteresis –– Divider Strobed Ground for Reduced Current

Si7164DP

24V

GATE

IN

SOURCE

UVL

STATUS

1.65k

20k

LTC4231 UVH

4.22k OV

SHDN

32.4k GNDSW

TIMER GND

180nF


Special Functions/Battery Charger Support Devices LTM®2884: Isolated USB Transceiver with Isolated Power Features • Isolated USB Transceiver: 2500V RMS for 1 Minute •

USB 2.0 Full Speed and Low Speed compatible

•

Integrated Isolated DC/DC Converter, External or Bus Powered

•

Auto-Configuration of Bus Speed

•

15mm x 15mm BGA-44 Package

Powered 2.5W Isolated Hub Port

VBUS

8.6V TO 16.5V

LTM2884

VCC

VBUS

VCC2

VLO PWR

ON

HUB µC D1+

VBUS2

D2+

GND

VCC2

VLO PWR

ON

100µF

DOWNSTREAM USB PORT

D1+ UPSTREAM USB PORT

D2–

15k

LTM2884

VCC

VLO2

D1–

15k

+

VBUS

SPNDPWR

ISOLATION BARRIER

SPNDPWR

200mA AT 5V

500mA AT 5V

PERIPHERAL

ISOLATION BARRIER

4.4V TO 16.5V

Bus Powered 1W Isolated Peripheral Device

VLO2 1.5k D2+

D1–

D2–

GND2

GND

GND2

GND

Nano-Current Supervisors Portable applications will appreciate the low power consumption of 6V < VIN < 8.4V

our nano-current supervisors, which can directly monitor voltages up to 36V. Resistor-programmable or pin-selectable thresholds provide

Li-Ion 4.2V

flexibility in small footprints.

+

Features • 850nA Quiescent Current

Li-Ion 4.2V

•

Operating Range: 2.5V < VCC < 36V

•

1.5% (Max) Accuracy Over Temperature

•

Adjustable Reset Threshold

•

Adjustable IN+/IN– Threshold

•

2mm × 2mm DFN-8 and TSOT-8 Packages

Part Number

# of Voltage Monitors (# of Adj Inputs)

Monitor Voltages (V)

R2 6.04M C1 0.1µF 50V

LTC2960 36V Nano-Current 2-Input Voltage Monitor +

LTC3632 DC/DC GND

VOUT 1.8V R4 1.3M C2 1µF

LTC2960-3 DVCC

VCC R1 402k

IN+

RST

RESET

MR

OUT ADJ

LOW BATTERY

GND

R3 402k

POWER-FAIL FALLING THRESHOLD = 6.410V RESET FALLING THRESHOLD = 1.693V

Threshold Accuracy

Reset Pulse Width


Power Fail Warning

Manual Reset

Comments

Package (mm x mm)

Nano-Current Supervisors LTC2960

2 (2)

Adj

1.5%

15ms/ 200ms

0.85

~

~

Resistor Programmable Reset and UV/OV Thresholds

TSOT-8, 2x2 DFN-8

LTC2934

1 (1)

Adj

1.5%

15ms/ 200ms

0.5

~

~

Resistor Programmable Reset and Power-Fail Thresholds

TSOT-8, 2x2 DFN-8

LTC2935

1 (1)

1.6 to 6

1.5%

200ms

0.5

~

~

8 Pin-Selectable Reset and Power-Fail Thresholds

TSOT-8, 2x2 DFN-8

35

36


Pushbutton Controllers Our pushbutton controllers solve the inherent bounce problem associated with all mechanical contacts, while also enabling power supply converters and releasing a processor once the supply is fully powered up. Wide voltage operation, rugged ESD protection, small size, low quiescent current and ease of design distinguish these pushbutton controllers from discrete implementations. LTC2955: Pushbutton On/Off Controller with Automatic Turn-On Features • Automatic Turn-On via Voltage Monitor Input •

Wide Input Supply Range: 1.5V to 36V

•

Low Supply Current: 1.2μA

•

±25kV ESD HBM on PB Input

•

±36V Wide Input Voltage for PB Input

•

3mm x 2mm DFN-10 and TSOT-8 Packages

VTRIP = 5.4V

LT3008-3.3 VOUT

VIN

8.4V

SHDN R7 1M

VIN 0.1µF

LTC2955DDB-1 SEL INT

TMR

Supply Voltage

Supply Current

Turn-On Debounce Time

PGD

PB

402k

µP

KILL

ON

Description

1M

EN

2.32M

Part Number

3.3V

GND

POWER-FAIL

System OK Response Time

Interrupt Debounce Time

Turn-Off Debounce Time

Turn-Off Delay

ESD

Package

Pushbutton Controllers LTC2950

Basic Pushbutton Controller

2.7V to 26V

6µA

Adj

512ms

Adj

n/a

1024ms

10kV

TSOT-8, DFN-8

LTC2951

Basic Pushbutton Controller

2.7V to 26V

6µA

128ms

512ms

Adj

n/a

Adj

10kV

TSOT-8, DFN-8

LTC2952

Pushbutton Controller with 2 Ideal Diode-OR Controllers for Load Sharing or Automatic Switchover Applications

2.7V to 28V

25µA

Adj

400ms

26ms

Adj

400ms

8kV

TSSOP-20, QFN-20

LTC2953

Pushbutton Controller with Supply Monitor, UVLO and Power Fail Comparators for Supervisory Applications

2.7V to 27V

12µA

32ms

512ms

32ms

Adj

n/a

10kV

DFN-12

LTC2954

Pushbutton Controller with Interrupt Logic for Menu-Driven Applications

2.7V to 26V

6µA

Adj

512ms

32ms

Adj

n/a

10kV

TSOT-8, DFN-8

LTC2955

Pushbutton Controller with Automatic Turn-On and Interrupt Logic for Menu-Driven Applications

1.5V to 36V

1.2µA

32ms

512ms

32ms

Adj

n/a

25kV

TSOT-8, DFN-10

LTC2956

Wake-Up Timer with Pushbutton Controller

1.5V to 36V

0.3µA

32ms

n/a

n/a

Adj

n/a

25kV

MSOP-12, DFN-12


High Side and Low Side Current Sensing Sensing and controlling current flow is a fundamental requirement in many battery charger and monitor applications.

LT1999: High Voltage, Bidirectional Current Sense Amplifier 0.025

CHARGER

BAT

High side current sense amplifiers extract small differential LOAD

voltages from high common mode voltages. This is used

5V

1

to measure the voltage on a small sense resistor placed in series between a power supply and load, providing a direct

V+IN 2

measurement of current flowing into the load. where a sense resistor is placed between load and ground. The

5V

best solutions for low side sensing are micropower, rail-to-rail

2µA

SHDN

0.8k

4k

0.8k

4

5V

0.1µF 8 VSHDN

10µF

0.1µF

40k

+ –

4k V+

V–IN 3

In some applications, low side current sensing can be used,

LT1999-10

V+

42V

V+

– +

7 VOUT

+ VOUT 160k 6 VREF –

V+

160k

V+

5

+INVCC VREF LTC2433-1

CS

–IN

SDO

SCK

0.1µF

0.1µF

input amplifiers with low input bias current and low offset voltage. For more information, see our complete current sense solutions

Dual Current Sensor for Charge/Discharge Monitoring

guide at www.linear.com/currentsense

Part Number

Directional Sense

Input Voltage Range (V)

Response Time (µs)

VOS Max (µV)

VOS Offset Drift

IBIAS Max

Gain Settings

Package

High Side Current Sense Amplifiers LT1787

Bidirectional

2.5 to 65

10

75

0.5µV/°C

20µA

Fixed Gain=8

SO-8, MSOP-8

LT1787HV

Bidirectional

2.5 to 65

10

75

0.5µV/°C

20µA

Fixed Av=8

SO-8, MSOP-8

LTC4151

Unidirectional

7 to 80

n/a

4000

n/a

n/a

n/a

DFN-10, MSOP-10

LT6100

Unidirectional

4.1 to 48

40

300

0.5µV/°C

10µA

10,12.5,20,25,40,50V/V

DFN-8, MSOP-8

LTC6101

Unidirectional

4 to 105

1

300

1µV/°C

170nA

Adj w/ 2 Resistors

SOT-23, MSOP-8

LTC6101HV

Unidirectional

5 to 105

1

300

1µV/°C

170nA

Adj w/ 2 Resistors

SOT-23, MSOP-8

LTC6102

Unidirectional

4 to 105

1

10

25nV/°C

3nA

Adj w/ 2 Resistors

DFN-8, MSOP-8

LTC6102HV

Unidirectional

5 to 105

1

10

50nV/°C

3nA

Adj w/ 2 Resistors

DFN-8, MSOP-8

LTC6103

Unidirectional

4 to 70

1

450

1.5µV/°C

170nA

Adj w/ 2 Resistors/amp

MSOP-8

LTC6104

Bidirectional

4 to 70

1

450

1.5µV/°C

170nA

Adj w/ 3 Resistors

MSOP-8

LT6105

Unidirectional

-0.3 to 44

3.5

300

0.5µV/°C

25µA

Adj w/ 2 Resistors

DFN-6, MSOP-8

LT6106

Unidirectional

2.7 to 44

3.5

250

1µV/°C

40nA

Adj w/ 2 Resistors

SOT-23

LT6107

Unidirectional

2.7 to 44

3.5

250

1µV/°C

40nA

Adj w/ 2 Resistors

SOT-23

LT1999

Bidirectional

-5 to 80

2.5

750

5µV/ºC

2.5µA

10, 20, 50 V/V

MSOP-8, SO-8

LT6108

Undirectional

2.7 to 60

3

125

0.8µV/ºC

300µA

Adj w/ 2 Resistors

MSOP-8, DFN-8

LT6109

Undirectional

2.7 to 60

3

125

0.8µV/ºC

300µA

Adj w/ 2 Resistors

MSOP-8

LT6118

Undirectional

2.7 to 60

3

125

0.8µV/ºC

300µA

Adj w/ 2 Resistors

MSOP-8, DFN-8

LT6119

Undirectional

2.7 to 60

3

125

0.8µV/ºC

300µA

Adj w/ 2 Resistors

MSOP-8

Part Number

Description

Railto-Rail

Direction Sense

Input Voltage Range (V)

VOS Max (µV)

VOS Drift

IBIAS Max

Gain

Package

Low Side Current Sense Amplifiers LT6015/6/7

Single/Dual/Quad Precision Over-the-Top Op Amps

In/Out

Bidirectional

0 to 76

50

0.75µV/°C

5nA

Adj w/ 2 Resistors

ThinSOT, MSOP-8, DFN-22

LT1490A/91A

Dual/Quad Over-The-Top® µPower Rail-to-Rail Op Amps

In/Out

Bidirectional

0 to 44

500

4µV/°C

8nA

Adj w/ 2 Resistors

DFN-8, DIP-8, MSOP-8, SO-8, DIP-14, SO-14

LT1636

Over-The-Top Micropower , Rail-to-Rail Single Supply Op Amp

In/Out

Bidirectional

0 to 44

225

5µV/°C

8nA

Adj w/ 2 Resistors

DFN-8, DIP-8, MSOP-8, SO-8

LT1638/39

1.2MHz, Over-The-Top Micropower Rail-to-Rail Op Amp

In/Out

Bidirectional

0 to 44

600

6µV/°C

50nA

Adj w/ 2 Resistors

DFN-8, DIP-8, MSOP-8, SO-8, DIP-14, SO-14

LTC2054/55

Single/Dual Low Power, Zero-Drift, 3V, 5V, ±5V Op Amps

Out

Bidirectional

0 to V±0.7

3

0.05µV/ºC

3nA

Adj w/ 2 Resistors

ThinSOT, DFN-8, MSOP-8

LT6105

Precision, High Side or Low Side, Current Sense Amplifier

In

Unidirectional

-0.3 to 44

300

1µV/°C

25µA

Adj w/ 2 Resistors

DFN-6, MSOP-8

LTC2057

High Voltage Low Noise Zero-Drift Op Amp

Out

Bidirectional

-0.1 to V±1.5

5

0.225µV/ºC

200µA

Adj w/ 2 Resistors

DFN-8, MSOP-8, MSOP-10, SO-8

37

Integrated Pass Transistor

Charge Termination

Standalone

Battery Charge Current (Max), A


Temperature Control

1.5

~

~

‡

~

‡

~

~

‡

~

~

~‡

~

~

~¶

~

¶

~

~

¶

~

~

~¶

~

~

¶

~

~¶

~¶

~

1

1

2

1.25

0.25

0.95

0.95

1.2

1

1

1

1

1-14

1

1

1

~

~

~

~

~

~

~

~

~

¶

~

~

~

†

~

~†

~

†

~‡ ~

~

‡

~

~

~

~

~

–

–

~

~

~

~

~

~‡

~

~

~

~¶

~¶

~

~

~

~

~

~

~

~

~ ~ ~

– – –

~

–

~

~

~

~

~

~

– ~

~

~

–

~

–

~

~

~

~

~

– ~

~

~

~

~

~

~

~

~

–

~

~

–

* Current C/10, † Current C/x, ‡ Timer, § µC, ¶Timer + Current Indication, # PROG Pin Tracks Charge Current, ** Gas Gauge Capability, †† For 1-Cell LiFePO4

1

1 ~

~

–

~

~

~

–

~

– ~**

~

~

~

~

~

~

~

~

~

~

~

~

Li-Ion/Polymer 4.2V/Cell & 4.1V/Cell Linear Battery Chargers

~

~

1.25

1

~

1

1.2

1

~

~

~

1.2

1

~

1.5

1

~

~

1.5

1.5

1

1.25

1.5

1

~

1

1.5

1

~

1

1.5

1

LTC4066

QFN-24

DFN-10 DFN-10 DFN-10 DFN-10

– – –

LTC4096/X

LTC4075/X

LTC4078/X

LTC4079

LTC4053 DFN-10 MSOP-10

LTC4063

LTC4062

LTC4061

LTC4050

LTC4085

LTC4067

LTC4055

Integration/Features

MSOP-10

DFN-10

DFN-10

DFN-10

DFN-14

DFN-12

QFN-16

LTC4089

LTC4090

DFN-22

LTC4088

DFN-22

LTC4098-3.6 ††

LTC4098

LTC4160

LTC4099

Most

Part Number

DFN-14

QFN-20

QFN-20

QFN-20

QFN-20

Package (mm x mm)

~

~

~

–

–

~

~

~

~

~

~

~

~

~

~

~

~

Li-Ion/Polymer 4.2V/Cell & 4.1V/Cell Linear Battery Chargers with PowerPath Control (Power Managers)

ICHARGE Monitor #

Status Signals

End-of-Charge Signal

Charge Termination & Integration

Thermal Regulation

Battery

AC Present Signal

MASTER SELECTOR GUIDES—Power Managers and Linear Battery Chargers


Least

38 B AT T E RY C H A R G I N G S O L U T I O N S Lithium-Ion/Polymer

Integrated Pass Transistor

Charge Termination

Standalone



0.9

0.8

1

0.7

1

1

1

1

–

~

–

–

~

~

~

~

~

~

~

~

~

~

~

~

–

50mA

0.18

1

1

–

~

~

~

–

~

~§

~

~

~

–

~

–

–

–

–

~

–

–

–

~

– ~

–

–

~

–

~

~

– – ~

–

– –

~

–

–

–

~

~

~

–

~

~

~

–

~

~

– ~

~

–

–

–

~

~

~

–

~

~

~

~

–

~ ~

~

DFN-6 –

–

~

~

ThinSOT

LTC4071 2x3 DFN-8, MSOP-8E

LTC4065L/LX LTC4070

DFN-6

–

LTC4059/A

LTC4054L

2x3 DFN-8, MSOP-8E

DFN-6

ThinSOT

ThinSOT

LTC4064 MSOP-10E

LTC4059/A LTC4057

DFN-6

LTC4056

LTC4065/A

LTC4070

LTC4054/X

ThinSOT

–

–

–

~

–

ThinSOT

– –

DFN-6

ThinSOT

LTC1733

LTC1732

MSOP-10E

LTC4058/X

LTC4068/X

LTC4095

LTC4076

LTC4077


LTC1731

Most

Part Number

MSOP-8

~

–

~

–

MSOP-10

DFN-8

– –

DFN-8 DFN-8

–

DFN-10 DFN-10

– –

Package (mm x mm)

~

Temperature Control

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

‡

~

~

~* ~§

~

~

–

~

§

~ ~

~ ~

~ ~‡

§

~§ ~

–

– ~

~

~

~‡

~

‡

~

~

~

~

~

~

~¶

~*

~‡

–

–

~‡

–

‡

~

~

~

~

~

~

~

~ ~

End-of-Charge Signal

* Current C/10, † Current C/x, ‡ Timer, § µC, ¶ Timer + Current Indication, # PROG Pin Tracks Charge Current, ** Gas Gauge Capability, †† 500mA With External PFET

0.25

50mA††

1

1

0.15

0.9

1

1

~ ~

~*

~

†

~¶

~†

~†

Li-Ion/Polymer Coin Cell Battery Chargers

0.75

0.7

0.75

1

1

0.8

1

1

1.5

1

0.95

1

2

0.95

1

2

0.95

1

1, 2

0.95

1

1, 2

0.95

1

Li-Ion/Polymer 4.2V/Cell & 4.1V/Cell Linear Battery Chargers

ICHARGE Monitor #

Status Signals

Thermal Regulation



Battery

AC Present Signal

MASTER SELECTOR GUIDES—Power Managers and Linear Battery Chargers (continued)

LTC1734L

LTC1734

Least

Lithium-Ion/Polymer

B AT T E RY C H A R G I N G S O L U T I O N S 39

Standalone



4

2

1-16

1-4

~

~

~

Charge Termination ~§

~#

~#

4

2

2

4

0.4

4

2

1.5

4

2

1

1-2

3-4

1-4

2-4

1-2

1-2, adj

1-2

~

–

~

~

~

~

~

~

~

~

–

–

–

– ~

– – –

– ~ –

~‡

~¶,††

~

~

~

~

–

‡

~

~

~

~

~

‡

– ~

–

~‡

~‡

~**

–

–

~

~

~

~

~

End-of-Charge Signal –

~

~

~

~

‡

–

–

–

~

–

–

~**

~**

Status Signals

AC Present Signal –

–

–

~

–

–

–

–

~

–

~

–

–

~

~

~ ~

–

~

~

~

~

~

~

~

–

~

~

–

–

–

~

~

~

~

~

~

~

~

Temperature Control

* Current C/10, † Current C/x, ‡ Timer, ¶ µC, § T, t, -dV , # T, t, -dV, dT/dt, ** Timer + Current, †† for Li-Ion Termination, use LTC1729, ‡‡ PROG Pin Tracks Charge Current

4

1

Li-Ion/Polymer Switch Mode Battery Chargers

4

1-16

NiMH/NiCd Battery Chargers



ICHARGE Monitor ‡‡

Battery

Thermal Regulation

MASTER SELECTOR GUIDES—Switch Mode Battery Chargers


LTC4002

DFN-10 SO-8

LTC1980

LTC4006

LT1571

LTC4121

LTC4007

LT3650

LTC4001/-1

LT3651-8.x

LT3651-4.x

LTC4010 Switch Mode LTC4060 Linear


LTC4011 Switch Mode

Most

Part Number

SSOP-16 SSOP-28

SSOP-24

SSOP-16

QFN-16

SSOP-24

DFN-12

SSOP-24

QFN-36

QFN-36

DFN-16 TSSOP-16

TSSOP-16E

TSSOP-20E

Package (mm x mm)

Least

40 B AT T E RY C H A R G I N G S O L U T I O N S Lithium-Ion/Polymer

Standalone


VBAT Range, V

4

8

4

4

3.5-28

3-21

3.5-26

3.0-5.5

~

~

~

~

~

Charge Termination Method(s)

– – – –

– – – –

SMBus¶ ¶

¶

¶

SMBus

SMBus

SMBus

–

Integrated Pass Transistor –

SMBus‡,¶

End-of-Charge Signal –

–

–

–

–

~

~

~

–

~

~

~

–

1-4 0.4

1-14 0.25

8

8

2

2

4

4

4

3

0.75

2

2

1.5

1

3.5-28

2.5-23

3.3-18

3.3-14.4

2-28

2-28

3-28

2.5-26

1.5-20

1.5-20

2.5-26

2.5-26

2.5-26

~

~

‡

~ – – – – – –

– – – – – – –

–

~

¶,††

~¶,††

~¶,††

~

~

~

~

¶,††

~

~

~¶,††

~¶,††

~ ~

~

–

¶

–

–

~

–

¶

~

~

¶

~

–

~

~

–

~

~

~

~

~**

~**

~ ~

–

–

¶,††

–

–

–

¶

SPI

~

~

~‡

~

~

~

**

–

–

–

–

–

–

~

~

~

–

–

–

–

–

–

–

–

–

–

~

~

~

~

–

–

~ ~

– – –

~

–

–

–

–

–

–

Temperature Control

–

–

–

–

–

–

~

–

–

~

~

–

–

~

~

~

~

~

~

~

~

LT3652



TSSOP-16, SSOP-28

TSSOP-20, SSOP-28

DD Pak, TO-220

SO-8

SO-24

SSOP-20

QFN-20

QFN-20

LT1505 LT3652HV

LTC4121

LTC4101

LTC4100

SSOP-28

LTC1960

LTC4020

LTC1759

LTC1760

LTC4110

Most

Part Number


SSOP-36, QFN-38

DFN-10

QFN-16

5x7 QFN-38

SSOP-24

SSOP-24

SSOP-36

TSSOP-48

QFN-38

Package (mm x mm)

* Current C/10, † Current C/x, ‡ Timer, ¶ µC , § T, t, -dV , # T, t, -dV, dT/dt, ** Timer + Current, †† for Li-Ion Termination, use LTC1729 , ‡‡ PROG Pin Tracks Charge Current

–

–

–

–

–

–

–

–

~

~

–

~

2.5-55 20A+

Lead-Acid, Li-Ion/Polymer, NiMH/NiCd Switch Mode Battery Chargers

3

3.5-18

Smart Battery Chargers

ICHARGE Monitor ‡‡

Status Signals

Thermal Regulation



Battery

AC Present Signal

MASTER SELECTOR GUIDES—Switch Mode Battery Chargers (continued)

LTC4008

LTC4009/-1/-2

LTC4012/-1/-2/-3

LTC4079


LT1510

LT1571

LT1769

LT1513

LT1512

LT1511

Least

Lithium-Ion/Polymer

B AT T E RY C H A R G I N G S O L U T I O N S 41

Ideal Diode

Li-Ion/Polymer Charger

Buck-Boost (BB)/ Boost (IOUT)

Buck(s) (IOUT)


3.3V, 20mA

1A, 400mA x2

400mA, – 600mA

–

400mA x2

600mA, – 400mA x2

1A BB

400mA x 2, 1A

–

–

200mA x2

200mA

4

4

4

4

3

2

2

2

2

–

400mA, – 800mA

600mA

300mA

300mA

2

1

1

1

–

–

–

–

–

–

–

Linear

Linear

Linear

Linear

Linear

Linear

Linear

Linear

Sync Buck + Linear

Sync Buck + Linear

0.5

0.5

0.95

0.95

0.95

0.95

0.5

0.5

1.5

1.5

0.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

–

–

–

–

–

–

Linear

Linear

Switch Mode

Switch Mode

Linear

Switch Mode

Linear

Switch Mode

Switch Mode

Linear

Linear

Switch Mode

–

–

–

–

–

–

–

–

Int + Ext (opt.)

Int + Ext (opt.)

–

Int + Ext (opt.)

Int + Ext (opt.)

Int + Ext (opt.)

Int + Ext (opt.)

Int + Ext (opt.)

Int + Ext (opt.)

Int + Ext (opt.)

Other Features

– – – –

4.3 to 8 2.7 to 4.5 2.7 to 4.5

–

–

4.25 to 8

5, USB

5, USB

–

4.35V to 5.5V

3x3 DFN-10


3x5 DFN-16

3x5 DFN-16

3x3 QFN-16

3x3 QFN-20

3x3 QFN-20

3x3 QFN-20

4x4 QFN-24

I2C –

4x4 QFN-24

–

4x4 QFN-24

4x5 QFN-24

I2C

–

4x4 QFN-28

4.35V to 5.5V

4.25 to 5.5

4.25 to 5.5

5, USB, Li Ion

5, USB, Li Ion

5, USB, Li Ion, Hi-V 38V max

–

4x5 QFN-28

I2C

5, USB, Li Ion

4x6 QFN-38

5, USB, Li-Ion, I2C Hi-V 38V with 60V transients; OVP: 68V

4x7 QFN-44

4x6 QFN-38

4x7 QFN-44

–

–

Interface

–

5, USB, Li Ion, Hi-V Bat-Track, OVP

5, USB, Li Ion, Hi-V Bat-Track, OVP

5, USB, Li Ion

Package (mm x mm)

11 7, 12

7, 11

LTC3556 LTC3557/-1

LTC3555/1/-3

13 13 13

LTC4080 LTC4081

13

LTC3552/-1 LTC3550/-1

13

12

LTC3553

7, 13

12

LTC3554

LTC3559/-1

11

LTC3567

LTC3558

11

LTC3566

7, 12

7, 11

12

LTC3677/-3

LTC3576/-1

7, 12

LTC3577/-1/-3/-4

Least

7, 11

LTC3455/-1


Page #

LTC3586/-1

Most

Part Number


–

0.4A BB

400mA

400mA x2

2

–

–

3.3V, 25mA

3.3V, 25mA

150mA

2

Sync Buck + Linear

Linear

Sync Buck + Linear

Sync Buck + Linear

Linear

Linear

Sync Buck + Linear

Flexible Gain Linear Block for LDO Controller

3.3V, 25mA

3.3V, 25mA

3.3V, 25mA

–

1A BB

–

1A BB

–

2 x 150mA

600mA, – 400mA x2

4

2 x 150mA

600mA, 10-LED 400mA Boost x2

3.3V, 20mA

5

1A BB, 0.8A Boost

400mA x2

5

Li-Ion/Polymer Multifunction Power Management Integrated Circuits (PMICs)


Battery Charger/Power Manager

PowerPath Topology

Onboard Regulators

LDO(s) (IOUT)

MASTER SELECTOR GUIDES—Multifunction PMICs

Input Voltage (V)

42 Lithium-Ion/Polymer


μModule Battery Chargers A µModule Power Product simplifies implementation, verification, and manufacturing of complex power circuits by integrating the power function in a compact molded plastic package. LTM8062/A: 32VIN, 2A μModule Power Tracking Battery Charger Features • Complete Battery Charger System

2A µModule Battery Chargers

•

Input Supply Voltage Regulation Loop for Peak Power Tracking in MPPT (Maximum Peak Power Tracking) Solar Applications

•

Resistor Programmable Float Voltage Up to 14.4V on the LTM8062 and 18.8V on the LTM8062A

•

Wide Input Voltage Range: 4.95V to 32V (40V Abs Max)

•

9mm × 15mm × 4.32mm LGA Package

Applications • Industrial Handheld Instruments •

12V to 24V Automotive and Heavy Equipment

•

Desktop Cradle Chargers

•

Solar Power Battery Charging

Charge Current vs Battery Voltage

Pin Configuration TOP VIEW

2500

CHARGING CURRENT (mA)

2000

BIAS ADJ FAULT CHRG GND

7

NORMAL CHARGING

BAT

6

NTC TMR RUN VINREG

BANK 2

5

1500

VINA

4 1000

0

BANK 1

3

GND

2

500

PRECONDITION

BANK 3

BANK 4 VIN

1

TERMINATION 0

Part Number

1

3 2 BATTERY VOLTAGE (V)

Battery Float Voltage (V)

A

4

B

C

D

E

F

G

H

J

K

L

LGA PACKAGE 77-LEAD (15mm × 9mm × 4.32mm)

Input Voltage (V)

Charge Current (A)

Battery Chemistry

Package Type

Package Dimensions (mm)

µModule Battery Chargers LTM8061

4.1 - 8.4

4.95 - 32

2

Li-Ion, Li-Poly

LGA

9 x 15 x 4.3

LTM8062

3.3 - 14.4

4.95 - 32

2

Li-Ion, Li-Poly, Lead Acid, LiFePO4

LGA

9 x 15 x 4.3

LTM8062A

3.3 - 18.8

4.95 - 32

2

Li-Ion, Li-Poly, Lead Acid, LiFePO4

LGA

9 x 15 x 4.3

43

N o t es :

S a l es O f f ice s N O RT H AME RI CA

NO RT HE A S T U. S .

C H IN A

K OREA

WES TER N U .S.

Connecticut Tel: (860) 228-4104

Room 1763, Office Building New Century Hotel No. 6 Southern Road of Capital Gym Haidian District Beijing, China 100044 Tel: +86 (10) 6801-1080 Fax: +86 (10) 6805-4030

Yundang Building, #1002 Samsung-Dong 144-23 Kangnam-Ku Seoul 135-090, Korea Tel: +82 (2) 792-1617 Fax: +82 (2) 792-1619

Unit 09, 14/F, Complex Building No. 88 Shenghe Yi Rd., Hi-Tech Zone Sichuan Province, Chengdu City China 610041 Tel: +86 028-8555 9725 Fax: +86 028-8542 6859

S IN G APORE

Unit 1503-04, Metroplaza Tower 2 223 Hing Fong Road Kwai Fong, N.T., Hong Kong Tel: +852 2428-0303 Fax: +852 2348-0885

TAIWAN

2085 E. Technology Cir., Ste. 101 Tempe, AZ 85284 Tel: (480) 777-1600 Fax: (480) 838-1104 7595 Irvine Center Dr., Ste. 120 Irvine, CA 92618 Tel: (949) 453-4650 Fax: (949) 453-4765 11300 W. Olympic Blvd., Ste. 700 Los Angeles, CA 90064 Tel: (818) 703-0835 Fax: (818) 703-0517 720 Sycamore Dr. Milpitas, CA 95035 Tel: (408) 428-2050 Fax: (408) 432-6331 3009 Douglas Blvd., Ste. 140 Roseville, CA 95661 Tel: (916) 787-5210 Fax: (916) 787-0110 5090 Shoreham Place, Ste. 110 San Diego, CA 92122 Tel: (858) 638-7131 Fax: (858) 638-7231

15 Research Place North Chelmsford, MA 01863 Tel: (978) 656-4750 Fax: (978) 656-4760 New York Tel: (978) 656-4750 3220 Tillman Dr., Ste. 120 Bensalem, PA 19020 Tel: (215) 638-9667 Fax: (215) 638-9764 S O UT HE A S T U. S . Huntsville, AL Tel: (256) 881-9850 Fort Lauderdale, FL Tel: (407) 688-7616 Orlando, FL Tel: (407) 688-7616 Tampa, FL Tel: (813) 634-9434 Atlanta, GA Tel: (770) 888-8137

7102 La Vista Place, Ste. 201 Niwot, CO 80503 Tel: (303) 926-0002 Fax: (303) 530-1477

170 Weston Oaks Ct. Cary, NC 27513 Tel: (919) 677-0066 Fax: (919) 678-0041

Salt Lake City, NV Tel: (801) 731-8008

8500 N. Mopac, Ste. 603 Austin, TX 78759 Tel: (512) 795-8000 Fax: (512) 795-0491

5285 SW Meadows Rd., Ste. 240 Lake Oswego, OR 97035 Tel: (503) 431-6960 Fax: (503) 431-6961 2018 156th Ave. NE, Ste. 100 Bellevue, WA 98007 Tel: (425) 748-5010 Fax: (425) 748-5009

22515 Sail Harbour Ct. Katy, TX 77450 Tel: (713) 463-5002

Indiana Tel: (847) 925-0860 Iowa Tel: (847) 925-0860 Kansas Tel: (913) 634-7966 Michigan Tel: (440) 239-0817 7805 Telegraph Rd., Ste. 225 Bloomington, MN 55438 Tel: (952) 903-0605 Missouri Tel: (913) 634-7966 Columbus, OH Tel: (614) 488-4466 7550 Lucerne Dr., Ste. 106 Middleburg Heights, OH 44130 Tel: (440) 239-0817 Fax: (440) 239-1466 Wisconsin Tel: (262) 331-4040

Room 2109-2111, 21/F, Block D Southern International Plaza 3013 Yitian Road, Futian District Shenzhen, China 518048 Tel: +86 755-2360-4866 Fax: +86 755-2360-4966 Room 1805, Tower A Optics Valley International Plaza No. 889 Luoyu Rd., Wuchang District Wuhan, China 430074 Tel: +86 027-8665 9231 Fax: +86 027-8665 9241

2301 W. Plano Pkwy., Ste. 109 Plano, TX 75075 Tel: (972) 733-3071 Fax: (972) 380-5138

Rm. 2410, Tower A, Greenland SOHO No. 5 ZhangBa 1 Road High-Tech Development Zone Shaanxi Province Xian, China 710065 Tel: +86 029-6851 8978 /68518979 Fax: +86 029-6851 8976

CA NA DA

IN D IA

Calgary, AB Tel: (403) 455-3577 Vancouver, BC Tel: (604) 783-3084

602, 6th Floor, Prestige Meridian-1 No. 29, MG Road, Bangalore 560001, India Tel: +91 80 4012-4610 Fax: +91 80 4012-4612

Ottawa, ON Tel: (613) 680-3473

JAPAN

MIDWES T U .S. 2040 E. Algonquin Rd., Ste. 512 Schaumburg, IL 60173 Tel: (847) 925-0860 Fax: (847) 925-0878

Room 2701, City Gateway No. 398 Cao Xi North Road Shanghai, China 200030 Tel: +86 (21) 6375-9478 Fax: +86 (21) 5465-5918

Toronto, ON Tel: (440) 239-0817 Montreal, QC Tel: (514) 236-6261

A SIA /PA C IFIC A US T R A L I A /NE W Z E AL AN D 133 Alexander Street Crows Nest, NSW 2065, Australia Tel: +61 (0)2 9432 7803 Fax: +61 (0)2 9439 2738 Suite 121A, 89 High Street Kew, Victoria 3101, Australia Tel: +61 3 9854 6120

7F, Sakuradori Ohtsu KT Bldg. 3-20-22 Marunouchi, Naka-ku Nagoya-shi, 460-0002, Japan Tel: +81 (52) 955-0056 Fax: +81 (52) 955-0058 6F Kearny Place Honmachi Bldg. 1-6-13 Awaza, Nishi-ku Osaka-shi, 550-0011, Japan Tel: +81 (6) 6533-5880 Fax: +81 (6) 6543-2588 8F Shuwa Kioicho Park Bldg. 3-6 Kioicho Chiyoda-ku Tokyo, 102-0094, Japan Tel: +81 (3) 5226-7291 Fax: +81 (3) 5226-0268

507 Yishun Industrial Park A Singapore 768734 Tel: +65 6753-2692 Fax: +65 6752-0108

8F-1, 77, Nanking E. Rd., Sec. 3 Taipei, Taiwan Tel: +886 (2) 2505-2622 Fax: +886 (2) 2516-0702

E U R O PE F IN L AN D Kirkkokatu 31 90100 Oulu, Finland Tel: +358 (0)46 712 2171 Fax: +358 (0)46 712 2175 Teknobulevardi 3-5, P.O. Box 35 FIN-01531 Vantaa, Finland Tel: +358 (0)46 712 2171 Fax: +358 (0)46 712 2175 F RAN C E Parc Tertiaire Silic 2 Rue de la Couture, BP10217 94518 Rungis CEDEX, France Tel: +33 (1) 56 70 19 90 Fax: +33 (1) 56 70 19 94 G ERMAN Y Haselburger Damm 4 D-59387 Ascheberg, Germany Tel: +49 (2593) 9516-0 Fax: +49 (2593) 951679 Osterfeldstrasse 84, Haus C D-85737 Ismaning, Germany Tel: +49 (89) 962455-0 Fax: +49 (89) 963147 Jesinger Strasse 65 D-73230 Kirchheim/Teck, Germany Tel: +49 (0)7021 80770 Fax: +49 (0)7021 807720 ITALY Via Torri Bianche 3, Palazzo Larice 20871 Vimercate (MB), Italy Tel: +39 039 596 5080 Fax: +39 039 596 5090 S WED EN Electrum 204, Isafjordsgatan 22 SE-164 40 Kista, Sweden Tel: +46 (8) 623 16 00 Fax: +46 (8) 623 16 50 U N IT ED K IN GDOM 3 The Listons, Liston Road Marlow, Buckinghamshire SL7 1FD United Kingdom Tel: +44 (1628) 477066 Fax: +44 (1628) 478153

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