1 Features

• 4-channels of short-to-VBUS overvoltage protection

(CC1, CC2, SBU1, SBU2): 63VDC tolerant

• 4-channels of IEC 61000-4-2 ESD protection

(CC1, CC2, SBU1, SBU2)

• CC1 and CC2 overvoltage protection FETs for

passing VCONN power

• ±65V surge protection on CC pins

• +65V/-35V surge protection on SBU pins

• Integrated VBUS divider circuit with enable for

dividing down EPR level VBUS

• Integrated FET driver for control of external EPR

blocking FET

• CC dead battery resistors integrated for handling

dead battery use case in mobile devices

• 3mm × 3mm QFN package

2 Applications

• Desktop PC/motherboard

• Standard notebook PC

• Chromebook and WOA

• Docking station

• Port/cable adapters and dongles

• Smartphones

3 Description

The TPD4S480 is a single-chip USB Type-C port

protection device that provides 48V Short-to-VBUS

overvoltage and IEC ESD protection.

Since the release of the USB Type-C connector,

many products and accessories for USB Type-C have

been released that do not meet the USB Type-C

specification. One example of this is USB Type-C

Power Delivery adapters that only place high voltage

on the VBUS line. Another concern for USB Type-C is

that mechanical twisting and sliding of the connector

could short pins due to the close proximity they have

in this small connector. This can cause 48V VBUS to

be shorted to the CC and SBU pins. Also due to the

proximity of the pins in the Type-C connector, there

is a heightened concern that debris and moisture will

cause the 48V VBUS pin to be shorted to the CC and

SBU pins.

These non-ideal equipment and mechanical events

make it necessary for the CC and SBU pins to be

48V tolerant, even though the pins only operate at 5V

or lower. The TPD4S480 enables the CC and SBU

pins to be 48V tolerant without interfering with normal

operation by providing over-voltage protection on the

CC and SBU pins. The device places high voltage

FETs in series on the SBU and CC lines. When

a voltage above the OVP threshold is detected on

these lines, the high voltage switches are opened up,

isolating the rest of the system from the high voltage

condition present on the connector.

The integrated VBUS divider circuit and FET driver,

allow PD controllers not rated for EPR operation to

safely operate in EPR voltage ranges. When enabled

by GPIO or automatically when VBUS exceeds 24V,

the TPD4S480 disables the optional external blocking

FET and enables the voltage divider. This action

protects 20V rated PD controllers and allows the use

of existing VBUS sense circuits.

Finally, most systems require IEC 61000-4-2 system

level ESD protection for external pins. The TPD4S480

integrates IEC 61000-4-2 ESD protection for the CC1,

CC2, SBU1, and SBU2 pins, eliminating the need

to place high voltage TVS diodes externally on the

connector.