TPD4S201RUKR [Texas Instruments]

The TPD4S201 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 shorting pins due to the close proximity they have in this small connector. This mechanical twisting nad sliding of the connector causes 28V VBUS to be shorted to the CC and SBU pins. Due to the proximity of the pins in the Type-C connector, there is a heightened concern of a short to the CC, SBU or USB2 pin to the the 28V VBUS pin caused by debris and moisure.

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 enables the CC and SBU or USB2 pins to be 28V tolerant without interfering with normal operation by providing overvoltage protection on the CC and SBU pins. The device places high voltage FETs in series on the SBU and CC lines. For systems not using alternate modes with SBU communication, the SBU pins of the TPD4S201 are available for 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 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.