RT6191A
RT6191A is 36V Buck Controller manufactured by Richtek.
36V Buck Controller with I2C Interface for USB-PD
General Description
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 to control the power path. With an I2C patible interface, the RT6191A supports many programmable functions including CV/CC output, switching frequency, and cable voltage drop pensation. 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.
Applications
- Monitor
- USB Power Delivery
- Power Bank
Features
- Support USB-PD 3.0 SPR Mode and 28V of USBPD 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 (250k Hz to 1MHz)
- Power Saving Mode Enables Higher Light Load Efficiency
- Any Power TM for Constant Voltage (12.5m V/step, Typ.) and Constant Current (in 9-Bit Resolution) Output Settings
- Embedded 2nd OCP Function
- Bypass Mode
- I2C patible Interface
- Adjustable Soft-Start Time
- Programmable Cable Voltage Drop pensation
- Built-in Bleeders for Quick VBUS Discharge
- Power Good Indicator
- Full Protection with UVLO, OVP, UVP, OCP, Cycle- by-Cycle Current Limit and OTP
- WQFN-40L 5x5 Package
Simplified Application Circuit
VSYS
Q1...
