Power supply circuit

Abstract

A power supply circuit adapted for an electronic device is provided. The power supply circuit comprises an input interface, a charging circuit, a switching circuit, and a protection circuit. The input interface is configured to receive a power voltage. The charging circuit is configured to convert the received power voltage into a system voltage, and provide the system voltage to a system power terminal. The switching circuit is coupled between the input interface and the charging circuit, and configured to be controlled by a control signal to be turned on or off. The protection circuit is configured to adjust the control signal provided to the switching circuit according to the system voltage fed back from the system power terminal, thereby controlling the switching circuit.

Dependencies are inferred from the claim text.