RT6191A
36V Buck Controller with I2C Interface for USB-PD
General Description
Features
⚫ Support USB-PD 3.0 SPR Mode and 28V of USB-
The RT6191A is a Buck controller designed for USB
power delivery (USB PD). It operates with wide input
voltage range from 4.5V to 36V, and the output voltage
is programmable from 3V to 36V. The RT6191A
implements peak current mode control mechanism with
the programmable constant voltage (CV) and constant
current (CC) output to support USB-PD 3.0 SPR mode
and 28V of USB-PD 3.1 EPR mode. It also has built-in
charge pumps for driving external low-cost N-MOSFETs
PD 3.1 EPR Mode
⚫ Integrated Buck Controller :
Wide Input Voltage Range : 4.5V to 36V
Wide Output Voltage Range : 3V to 36V
Peak Current Mode Control
Programmable Switching Frequency
(250kHz to 1MHz)
Power Saving Mode Enables Higher Light Load
2
Efficiency
to control the power path. With an I C compatible
TM
⚫ AnyPower
for Constant Voltage (12.5mV/step,
interface, the RT6191A supports many programmable
functions including CV/CC output, switching frequency,
and cable voltage drop compensation. Moreover, the
RT6191A integrates full protections including input
UVLO, over/under-voltage protection, cycle-by-cycle
current limit, short protection, and over-temperature
protection. The RT6191A is available in a WQFN-40L
5x5 package.
Typ.) and Constant Current (in 9-Bit Resolution)
Output Settings
⚫ Embedded 2nd OCP Function
⚫ Bypass Mode
2
⚫ I C Compatible Interface
⚫ Adjustable Soft-Start Time
⚫ Programmable Cable Voltage Drop Compensation
⚫ Built-in Bleeders for Quick VBUS Discharge
⚫ Power Good Indicator
Applications
⚫ Monitor
⚫ Full Protection with UVLO, OVP, UVP, OCP, Cycle-
by-Cycle Current Limit and OTP
⚫ USB Power Delivery
⚫ Power Bank
⚫ WQFN-40L 5x5 Package
Simplified Application Circuit
Q1
V
SYS
V
BUS
V
BUSC
BUSA
L
Q2
QC1
QA1
QC2
V
RT6191A
BOOT1
SW1
QA2
LDRV1
HDRV1
PSINN
CSINN
PSOUTN
CSOUTP
CSINP
VIN
CSOUTN
VOUT
DIS
EN
External 5V
VBYP
ALERT
SCL
GPC
VBUSC
GPA
2
I C Signal
SDA
VBUSA
PGOOD
PGOOD COMPV
VDD
VDDP
COMPI
TSEN
SS
GND
AGND
ADDRESS
Copyright © 2022 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6191A-00
December 2022
www.richtek.com
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