Patent ID: 9740261
Date: 2017-08-22
CPC Classifications: G06F

Claim:
1. A method of power delivery, comprising: providing a first port controller and at least a second port controller each including a state machine, an input/output (IO) pin, at least one receptacle supply pin (V said state machine implementing a dead-battery control (DBC) algorithm upon sensing a dead-battery condition comprising sensing a voltage on said receptacle supply pin and a lack of voltage on said VDD supply pin, said DBC algorithm: pulling up said IO pin; starting a timer set for a time period T wherein if said IO pin is pulled low resetting said first port controller or said second port controller for a pull low period and then restarting said DBC algorithm or continuing said monitoring of said IO pin until said IO pin is not pulled low for at least said T said first port controller or said second port controller pulling its said IO pin low for an assertion period of time to claim priority over another of said first and said second port controller, and sending a control signal by turning on said gate driver pin to close its associated one of said power path switches to exclusively provide said power to said power system sink.