RT1716WSC datasheet(12/37 Pages) RICHTEK

12 / 37 page

RT1716

DS1716-04

March 2020

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

USB_PD

The PD function of the RT1716 complies with USB Power

Delivery spec 3.0 and Type-C Port Controller Interface spec

1.0. Some

“Not support” functions are listed in the register

table.

Type-C Detection

The USB_PD implements multiple comparators which can

be used by software to determine the state of the CC1,

CC2 pins. This status information provides the host

processor all of the information required to determine

attach and detach status of the cable.

The USB_PD has three threshold comparators, which

match the USB Type-C specification for the three charge

current levels, which can be detected by a Type-C device.

These comparators can automatically trigger interrupts

to occur when there is a state change.

Detection through Autonomous DRP Toggles

The USB_PD has the capability to do autonomous DRP

toggles. In DRP toggles, the RT1716 implements DRP

toggle between SRC (source) and SNK (sink). It can also

present as a SRC or SNK only and monitor CC1, CC2

status.

Dead Battery Mode

RT1716 that supports being charged by USB whose

VDD’s DC-DC is off shall apply Rd to both CC1 and CC2

and follow all Sink rules. When it is connected to a Source,

DRP or Sourcing Device, the system will receive the default

VBUS. Circuitry to present Rd in this case only needs to

guarantee the voltage on CC is pulled within the same

range as the voltage clamp implementation of Rd in order

for a Source to recognize the Sink and provide VBUS.

RT1716WSC Datasheet(PDF) 12 Page - Richtek Technology Corporation