Solution for USB PD Type C
Kenny Chan
March, 2015
CONFIDENTIAL
Key Considerations of USB PD • Poor quality of adaptor or devices • Aging and poor quality problem of cable, plug, receptacle & Buck Cap •Cable voltage drop caused by high current • Dust problems
Safety
USB PD
• Low BOM Cost • Low Develop Cost •Low Mfg Cost
Cost
•Application Solution •HW/FW Support •Miniature Design •Design tool •Mfg. test •Certification/Logo •After service Total Solution
CONFIDENTIAL
Total Integrated Solution AC/DC
DC/DC
Buck RT7786 PWM
RT7207
RT7800
PD Control + CC/CV + SR + Protection
PD Control + Protection
RT9460 Charger IC - single cell
Boost
RT1710
3
CONFIDENTIAL
RT7800 - USB PD Controller Features •
USB PD 2.0 Type-C
•
High Flexibility :
•
•
•
Embedded ARM M0 MCU
•
Two I2C Interface for both EC & Charger
•
Programmable for DRP, DFP and UFP
•
Auto selection of various input source ( DC barrel or VBUS or VSYS5V )
High Integration: •
3 Power Path N-MOSFETs Drive
•
Rd , Rp Resistors and Switches Built in
•
LDO Built in
•
Support Vconn and Dead Battery Function
Protection: •
OVP for VBRL, VBUS, VSYS
•
OCP for VSYS
•
Vconn OVP and OCP
•
Vbus Constant Current and Cable Compensation
•
Quick Discharge
QFN5x5-32pins 4
CONFIDENTIAL
Built in LDO, CC, Vconn, Pre-driver Vbus XX Company
LDO
Vconn RT7800A
VCONN_CTRL Rp
Rp TXEN
CC
Tx
Rx
Rd Rd
Rd
CONFIDENTIAL
RT7800A Typical Application Circuit - Tablet RT7800 + RT9640 Enable Fast Charge MID VIN
USB PD Provider
LX SYS
VBUS C
5V DP DM
GC2A GC2B
P
GP CSVB VBRL VSYS5 VDD LDO1P8 GND
RT7800B USB PD Type-C Controller
SYS VIN
BAT
VPTS TS
Boost
Sys5V
Battery Pack
STAT
Type C Receptacle 24 Pins
IRQ CEB
SDA SCK
CC1 CC2
Smart Phone
RT9460 CHG CNTRL
CS+ IDAC for Vout adj. VRACT SCK_CHG SDA_CHG IRQ CEB STAT TS SCK_EC SDA_EC ALERT# (Fault, ACOK, BRLOK, Role SWAP...) EN
RT9640 AP
5V
Dual Role USB PD Port (Type C) 6
CONFIDENTIAL
RT7800A Typical Application Circuit - NB
BRL Receptacle
VCC
SYS VIN VBUS
C
option
GC1 GC2a GC2b VBP
VCONN1 VCONN2 CC1 CC2
CHG CNTRL
GP CSCS+
VCONN
P
SDA SCK
ACPRES
option
Type C Receptacle 24 Pins
ACDET
VBUS VBRL VSYS5
RT7800A USB PD Type-C
DAC_CV VRACT
SW
VIN
FB
EN
RT8296A
VDD V2 GND
SCK SDA ALERT# (Fault, ACOK, BRLOK, Role SWAP...) ENB
EC
V3.3
7
CONFIDENTIAL
RT7207 - USB PD Controller for SMPS Features • USB PD 2.0 Type-C Compliant , Other protocol is optional • Highly Integration: • ARM M0 MCU embedded • Transceiver embedded for BMC. • Programmable Type C current mode setting. (default, 1.5A, 3A) • CV and CC Control • Synchronous rectifier driver and controller (Operate in both DCM and CCM for wide output voltage range (RT7207T) BLD
• BLD pin for quick discharge • Shut regulator and Programmable cable compensation built in • Charge pump built in for wide VDD operation range ( 3V to 20V ). • USBP pin to directly drive external isolation P-MOSFETs . • Green mode in standby for power saving
PGND VG
V9
VCP
V5
AGND
V2
V_TR
AGND
CS+
VDD
QFN4X4 CS-
VDD
D-
USBP OVP
D+
• Protection:
• OTP, Adaptive OVP, Programmable UVP, SCP
CC1 CC2
RT
IFB VFB
OPTO
CONFIDENTIAL
AC/DC Adaptor Solution Adaptive Adaptor: VOUT
+
+
AC Mains
GND
+ 2 V_TR
22 VG
15, 16 4 VDD CS-
3 CS+
18 V2
9 RT
24 23 13 BLD PGND OVP
14 USBP
RT7207T VDD
DMAG
OPTO 12
GATE
HV RT7786 COMP
IFB 10
VCP VFB AGND V5 11 1, 17 19 20
V9 21
D5
D+ 6
CC1 7
CC2 8 CC2
CS/OTP
OPTO CC1
GND
• High Efficiency > 90% • Power Saving < 30mW @ 5V • High integration and Protection • Small size • Low cost
•QFN4x4 24 pin
9
CONFIDENTIAL
AC/DC Adaptor Solution Adaptive Adaptor: VOUT AC Mains GND
VDD
CS-
CS+
AGND
V2
V5
VCP
V9
CC2
BLD
USBP
RT7207D DMAG HV
VDD GATE
OPTO
OPTO
IFB
VFB
PGND CC1
RT7786
COMP
CS/OTP GND
CC2 CC1
• High Efficiency > 88% • Power Saving < 30mW @ 5V • High integration and Protection • Small size • Low cost
•SOP16
10
CONFIDENTIAL
Typical Application Circuit of RT7207T
SR
CC
Quick Discharge OTP
Charge Pump
Built in: CC/CV, LDO, TL431, OVP, OTP, SR, Cable Comp, Charge Pump, PMOS drive, Quick Discharge, Single Fault , PWM Off @ OVP 11
CONFIDENTIAL
RT7786: PWM for Adaptive Power Features
• Designed for adaptive power • Wide Vdd Range ( 7V~38V) • Adaptive Vo OVP , UVP for < 3V • Feedback Loop Fault Protection • Adaptive Loop Gain for Loop Stability • Adoptive Current Limit to meet LPS
DMAG
8
HV
COMP
2
7
NC
CS
3
6
VDD
GND
4
5
GATE
• High Efficiency: • CCM/QR Hybrid Control • Power Saving < 30mW @ 5V
SOP-8
• Other Protection:
• Vdd OVP, OCP, OLP, OTP, Adjustable Constant Output Power , Brown in/out protection, Secondary Rectifier Short Protection , Adaptive Vo OVP 12
CONFIDENTIAL
RT1710 _ E-Mark IC for USB PD Features • Support SOP’ and SOP’’ communication • Embedded RA resistor in detection pin • Support 2.7V to 5.5V operation on VCONN pin • Built-in voltage clamp in CC pin to avoid EOS • Built-in slew rate control for BMC signal to reduce the effect of EMI • Support custom structured VDM writing through CC pin
13
CONFIDENTIAL
Summary • Total USB PD Solution from Richtek Safety
USB PD Cost
Total Solution
14
