the RD resistor inside the TPD4S201, and enables VBUS to be applied from the power adapter even in a dead

battery condition. Once power is restored back to the system and back to the TPD4S201 on its VPWR pin, the

TPD4S201 turns ON its OVP FETs in 3.5ms and then turns OFF its dead battery RD. The TPD4S201 first turns

ON its CC OVP FETs fully, and then removes its dead battery RDs to make sure the PD controller RD is fully

exposed before removing the RD of the TPD4S201.

If desiring to power the CC/PD controller during dead battery mode and if the CC/PD Controller is configured

as a DRP, it is critical that the TPD4S201 be powered before or at the same time that the CC/PD controller is

powered. It is also critical that when unpowered, the CC/PD controller also expose its dead battery resistors.

When the TPD4S201 gets powered, it exposes the CC pins of the CC/PD controller within 3.5ms, and then

removes its own RD dead battery resistors. Once the TPD4S201 turns on, present the RD pull-down resistors

of the CC/PD controller immediately in order to maintain a connection. If the power adapter does not see RD

present, the VBUS disconnects. This event removes power from the device with its battery still not sufficiently

charged, which consequently removes power from the CC/PD controller and the TPD4S201. Then the RD

resistors of the TPD4S201 are exposed again, and connects the VBUS of the power adapter to start the cycle

over.

If the CC/PD Controller is configured for DRP and has started to DRP toggle before the TPD4S201 turns on, this

DRP toggle is unable to maintain a connection with a power adapter. If the CC/PD controller is configured for

DRP, the dead battery resistors of the PD controller need to be exposed as well, and that the resistors remain

exposed until the TPD4S201 turns on. This behavior is typically accomplished by powering the TPD4S201 at the

same time as the CC/PD controller when powering the CC/PD controller in dead battery operation.

If dead battery charging is not required in your application, connect the RPD_G1 and RPD_G2 pins to ground.

6.4 Device Functional Modes

The Device Mode Table describes all of the functional modes for the TPD4S201. The "X" in the below table

are "don't care" conditions, meaning the value present maintains functional mode and is within the absolute

maximum ratings of the data sheet.

Table 6-1. Device Mode Table

Device Mode Table

Inputs

Outputs

MODE

VPWR

C_CCx

C_SBUx

RPD_Gx

TJ

FLT

CC FETs

SBU FETs

Normal

Operating

Conditions

Unpowered,

no dead

battery

support

<UVLO

X

X

Grounded

X

High-Z

OFF

OFF

Unpowered,

dead battery

support

<UVLO

X

X

Shorted to

C_CCx

X

High-Z

OFF

OFF

Powered on,

SPR mode

>UVLO

<OVP

<OVP

X, forced

OFF

<TSD

High-Z

ON

ON

Fault

Conditions

Thermal

shutdown

>UVLO

X

X

X, forced

OFF

>TSD

Low (Fault

Asserted)

OFF

OFF

CC over

voltage

condition

>UVLO

>OVP

X

X, forced

OFF

<TSD

Low (Fault

Asserted)

OFF

OFF

SBU over

voltage

condition

>UVLO

X

>OVP

X, forced

OFF

<TSD

Low (Fault

Asserted)

OFF

OFF

IEC ESD

generated

over voltage

condition(1)

>UVLO

X

X

RD ON if

RPD_Gx is

shorted to

C_CCx

<TSD

Low (Fault

Asserted)

OFF

OFF

(1)

This row describes the state of the device while still in OVP after the IEC ESD strike which put the device into OVP is over, and the

voltages on the C_CCx and C_SBUx pins have returned to their normal voltage levels.

TPD4S201

SLVSIF2 – JULY 2025

www.ti.com

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