TPD4S480RUKR TI Chips TPD4S480 USB Type C 48V EPR Port Protector Short to VBUS

TI Chips TPD4S480RUKR TPD4S480 USB Type-C® 48V EPR Port Protector: Short-to-VBUS Overvoltage 

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

Applications
• Desktop PC/motherboard
• Standard notebook PC
• Chromebook and WOA
• Docking station
• Port/cable adapters and dongles
• Smartphones

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 
PD 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.