Abstract: A power control circuit includes a first power supply circuit configured to supply power to a universal serial bus upon a motherboard is turned on. When the motherboard is turned on, a first power source outputs a first voltage to a first input terminal of a double diode of the first power supply circuit, a second power source outputs a second voltage to a second input terminal of the double diode, an output terminal of the double diode outputs a first voltage, the first voltage controls the first electronic switch to switch on, and a third power supply outputs a second voltage through a first electronic switch of the first power supply circuit to provide power to the universal serial bus.

Abstract: A power control circuit includes a first power supply circuit configured to supply power to a universal serial bus upon a motherboard is turned on. When the motherboard is turned on, a first power source outputs a first voltage to a first input terminal of a double diode of the first power supply circuit, a second power source outputs a second voltage to a second input terminal of the double diode, an output terminal of the double diode outputs a first voltage, the first voltage controls the first electronic switch to switch on, and a third power supply outputs a second voltage through a first electronic switch of the first power supply circuit to provide power to the universal serial bus.