ACCESSORY DEVICE FOR MANAGING MULTIPLE POWER SOURCES

Aspects of the present disclosure provide techniques, including devices and systems implementing the techniques, for managing multiple power sources using an accessory device. One example accessory device includes a first power supply node configured to receive power from an alternative power source, a second power supply node configured to be coupled to a universal serial bus (USB)-C plug of a primary power source, an output power supply node configured to be coupled to a USB-C receptacle, and a management circuit. The management circuit includes an input node coupled to a first control configuration (CC) input line and a second CC input line; a first output node coupled to a first CC output line; and a second output node coupled to a second CC output line. The management circuit is configured to maintain an impedance of the CC input lines and CC output lines within a range.