6 Detailed Description

6.1 Overview

The TPD4S201 is a single chip USB Type-C port protector that provides 28V short-to-VBUS overvoltage and

ESD protection. Due to the small pin pitch of the USB Type-C connector and non-compliant USB Type-C cables

and accessories, the VBUS pins short to the CC and SBU pins inside the USB Type-C connector. Because of

this short-to-VBUS event, the CC and SBU pins need to be 28V tolerant, to support protection on the full USB

PD-SPR voltage range. The TPD4S201 integrates four channels of 28V short-to-VBUS overvoltage protection for

the CC1, CC2, SBU1, and SBU2 pins of the USB Type-C connector.

Additionally, IEC 61000-4-2 system level ESD protection is required to protect a USB Type-C port from

ESD strikes generated by end product users. The TPD4S201 integrates four channels of IEC61000-4-2 ESD

protection for the CC1, CC2, SBU1, and SBU2 pins of the USB Type-C connector, providing ESD protection

for all of the low-speed pins on the USB Type-C connector in a single chip. Additionally, high-voltage ESD

protection that is 21.5V DC tolerant is required for the CC and SBU lines to simultaneously support ESD and

short-to-VBUS protection. The TPD4S201 integrates a high-voltage ESD diode designed to work in conjunction

with the overvoltage protection FETs inside the device.

6.2 Functional Block Diagram

Control Logic and

Charge Pumps

Over-voltage

Protection

ESD

Clamps

ESD

Clamps

System

Clamps

System

Clamps

RD

RD

VPWR

SBU1

FLT

SBU2

CC1

CC2

C_SBU1

C_SBU2

C_CC1

C_CC2

VBIAS

RPD_G1

RPD_G2

VPWR

VPWR

6.3 Feature Description

6.3.1 4-Channels of Short-to-VBUS Overvoltage Protection (CC1, CC2, SBU1, SBU2 Pins or CC1, CC2, DP,

DM Pins): 28-VDC Tolerant

The TPD4S201 provides 4-channels of short-to-VBUS Overvoltage Protection for the CC1, CC2, SBU1, and

SBU2 pins (or the CC1, CC2, DP, and DM pins) of the USB Type-C connector. The TPD4S201 is able to

handle 28VDC on its C_CC1, C_CC2, C_SBU1, and C_SBU2 pins. This level of protection is necessary because

according to the USB PD specification, with VBUS set for 20-V operation, the VBUS voltage is allowed to legally

swing up to 21V and 21.2V on voltage transitions from a different USB PD VBUS voltage. The TPD4S201 builds

in tolerance up to 28VBUS to provide margin above this 21.2V specification to support inductive rining that occurs

during a short event.

TPD4S201

SLVSIF2 – JULY 2025

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