Power distribution circuitry including control unit IC

摘要

A power distribution circuit is disclosed. In one embodiment, the power distribution circuit includes a plurality of transistors and a control unit IC. First terminals of each of the transistors may be coupled to separate voltage sources. Second terminals of each of the transistors may be coupled to a common power node. An electronic system may receive power from one of the voltage sources when one of the transistors is on. The control unit IC may activate one or more of the transistors by driving a voltage to the control terminal of the transistor to be activated. The control unit IC may also monitor a voltage difference between the first terminal and the second terminal of each of the transistors. If the voltage of the second terminal becomes greater than the voltage of the first terminal for a given transistor, the control terminal may deactivate the transistor.