Source controller and power switch ascertains when a USB sink is attached

The Texas Instruments TPS25820/21 is a USB Type-C source controller including an integrated 1.5 A-rated USB power switch. The device monitors the Type-C configuration channel (CC) lines to ascertain when a USB sink is attached. If a sink is connected, the device applies power to VBUS and communicates the selectable VBUS current sourcing capability to the sink via the pass through CC line. If the sink is joined with an electronically marked cable, the device also applies VCONN power to the cable VCONN pin. The device does not apply VCONN power and is for functions where VCONN is not required such as USB 2.0 and data-less charging implementations. The device draws 1.0µA (typ) when nothing is attached. The FAULT output signals while the switch is in an overcurrent or overtemperature condition. The SINK output signals if a sink is connected and the POL output signals the polarity of the cable super-speed lines.