JAJSP20 November 2024 TPD4S480
PRODUCTION DATA
The CC pins on the USB Type-C connector serve many functions; one of the functions is to be a provider of power to active cables. Active cables are required when desiring to pass greater than 3 A of current on the VBUS line or when the USB Type-C port uses the super-speed lines (TX1+, TX2–, RX1+, RX1–, TX2+, TX2–, RX2+, RX2–). When CC is configured to provide power, it is called VCONN. VCONN is a DC voltage source in the range of 3V to 5.5V. If supporting VCONN, a VCONN provider must be able to provide 1.5 W of power to a cable; this translates into a current range of 273mA to 500mA (depending on the VCONN voltage level).
When a USB Type-C port is configured for VCONN and using the TPD4S480, this VCONN current flows through the OVP FETs of the TPD4S480. Therefore, the TPD4S480 has been designed to handle these currents and have an RON low enough to provide a specification compliant VCONN voltage to the active cable.