Automotive USB Type-C™ CC/D+/D- short-to-20V and IEC ESD protection

The TPD4S201-Q1 is a

single-chip USB Type-C port protection device that provides 28V 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. 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 28V 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 28V VBUS pin to be shorted to the CC, SBU, or USB2

pins.

These non-ideal

equipments and mechanical events make it necessary for the CC and other pins to be 28V

tolerant, even though the pins only operate at 5V or lower. The TPD4S201-Q1

enables the CC and SBU or USB2 pins to be 28V 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. For systems not utilizing alternate

modes with SBU communication, the SBU pins of the TPD4S201-Q1 can be used to

protect the USB2 data lines instead. 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.

Finally, most systems require IEC 61000-4-2

system level ESD protection for external pins. The TPD4S201-Q1 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.