Patent ID: 8866451

Claim:
A power supply apparatus comprising: a first power factor correction circuit that includes a first switching element, a first output voltage detection unit that detects an output voltage of the first power factor correction circuit, and a first current detection unit that detects a current flowing through the first switching element; a second power factor correction circuit that includes a second switching element; a second output voltage detection unit that detects an output voltage of the second power factor correction circuit, and a second current detection unit that detects a current flowing through the second switching element; and a control circuit that includes a first switching control unit that outputs a first switching signal for controlling the first switching element generated in accordance with a detected result by the first output voltage detection unit and the first current detection unit, and a second switching, control unit that outputs a second switching signal for controlling the second switching element generated in accordance with a detected result by the second output voltage detection unit and the second current detection unit, so that the output voltages of the first power factor correction circuit and the second power factor correction circuit are controlled by the first switching element and the second switching element, respectively.