By Texas Instruments 38
Texas Instruments' TPS25820 and TPS25821 are USB Type-C source controllers with an integrated 1.5 A-rated USB power switch. The TPS25820 and TPS25821 monitor the Type-C configuration channel (CC) lines to determine when a USB sink is attached. If a sink is attached, the TPS25820 and TPS25821 apply power to VBUS and communicate the selectable VBUS current sourcing capability to the sink via the pass-through CC line. If the sink is attached with an electronically marked cable, the TPS25820 also applies VCONN power to the cable VCONN pin. The TPS25821 does not apply VCONN power and is for functions where VCONN is not needed, such as USB 2.0 and data-less charging implementations.
The TPS25820 and TPS25821 draw 1.0 µA (typical) when nothing is attached. The FAULT output signals when the switch is in an overcurrent or overtemperature condition. The SINK output signals when a sink is attached and the POL output signals the polarity of the cable super-speed lines.
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