Power supply circuit and power supply method

Abstract

A power supply circuit coupled to a power source for providing electronic energy to a workload includes a first switch, a control circuit, a first diode, and a backup power, in which the input of the first switch is coupled to the power source, the output of the first switch is coupled to the workload. the control circuit is coupled to the control terminal of the first switch for determining the state of the power source, the anode of the first diode is coupled to the power source, the cathode of the first diode is coupled to the first terminal of the backup power, the first terminal of the backup power is further coupled to the workload, when the control circuit determines that the power source is in a power-off state, a control signal is applied to the control terminal of the first switch to turn off the first switch.

Dependencies are inferred from the claim text.