Texas Instruments TPD4S48x-Q1 USB Type-C® Port Protector ICs
Texas Instruments TPD4S48x-Q1 USB Type-C® Port Protector ICs are single-chip USB Type-C port protection ICs that provide IEC ESD and 48V short-to-VBUS overvoltage protection. Since the release of the USB Type-C connector, many products and accessories for USB Type-C have not met the specifications. One example is USB Type-C Power Delivery adapters that only place high voltage on the VBUS line. There is also concern about the mechanical twisting and sliding of the connector shorting pins due to the pins' proximity to the small connector. This mechanical twisting and sliding can cause the 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 concern that debris and moisture will cause the 48V VBUS pin to be shorted to the CC, SBU, or USB2 pins.
These mechanical events and non-ideal equipment make it necessary for the CC and other pins to be 48V tolerant, even though the pins only operate at 5V or lower. The Texas Instruments TPD4S48x-Q1 enables the CC and SBU or USB2 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. For systems not utilizing alternate modes with SBU communication, use the SBU pins of the TPD4S48x-Q1 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 on the connector.
The integrated VBUS divider circuit and FET driver allow PD controllers not rated for EPR operation to operate safely in EPR voltage ranges. When enabled by GPIO or automatically when VBUS exceeds 24V, the TPD4S480-Q1 disables the optional external blocking FET and enables the voltage divider. This action protects 20V-rated PD controllers and allows using existing VBUS sense circuits. The TPD4S481-Q1 does not include this feature.
Finally, most systems require IEC 61000-4-2 system-level ESD protection for external pins. The TPD4S48x-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.
Features
- Qualified for automotive applications
- AEC-Q100 qualified with the following results of device temperature grade 2 with -40°C to +105°C ambient operating temperature range
- 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
- +65/-35V surge protection on SBU pins
- Integrated VBUS divider circuit with an enable for dividing down the EPR level VBUS (TPD4S480-Q1 only)
- Integrated FET driver for control of external EPR blocking FET (TPD4S480-Q1 only)
- CC dead battery resistors are integrated for handling the dead battery use case
- 3.5mm x 3.5mm QFN package
Applications
- Automotive USB charging
- Automotive media hub
- Automotive head unit
- Automotive display module
Datasheets
Functional Block Diagrams
