Patent ID: 9705323
Date: 2017-07-11
CPC Classifications: G06F,H02J,H02M

Claim:
1. A power control circuit for a power supply system supplying power to a chipset of an electronic device, wherein the power supply system comprises a power supply and a voltage converter, and the voltage converter converts a supply voltage of the power supply into a predetermined voltage and outputs the predetermined voltage to the chipset, comprising: a switch, having a first terminal coupled to the power supply, a second terminal coupled to the voltage converter, and a control terminal; and a first switch controller coupled to the control terminal of the switch and the chipset, controlling the switch to couple the power supply to the voltage converter according to a turning-on event of the power supply system, wherein the first switch controller comprises a power-on switch, wherein the switch does not couple the power supply to the voltage converter before the turning-on event of the power supply system, and wherein the power control circuit is configured such that when the power supply is plugged in but before the power-on switch is conducting during the turning-on event of the power supply system, the power supply is isolated from the voltage converter and the chipset.