Patent ID: 8179703

Claim:
A power factor correction converter comprising: a rectifier circuit arranged to rectify an alternating-current voltage received from an alternating-current input power supply; a series circuit connected to a trailing portion of the rectifier circuit and an inductor and a switching element; a rectifying and smoothing circuit connected in parallel with the switching element; a switching control circuit arranged to on/off controls the switching element so that input current received from the alternating-current input power supply has a shape similar to a shape of the alternating-current voltage; an input voltage detection circuit arranged to detect an input voltage received from the alternating-current input power supply; an inductor current detection circuit arranged to detect current passing through the inductor; and an output voltage detection circuit arranged to detect an output voltage of the rectifying and smoothing circuit; wherein the switching control circuit defines, as a reference current amplitude value, a product of an output voltage error, the output voltage error being an error between a desired output voltage value and a value of the detected output voltage, and a value of the detected input voltage and controls the on-time of the switching element in accordance with a difference between the reference current amplitude value and current passing through the inductor; and the switching control circuit includes an output voltage control value correction circuit arranged to correct one of the desired output voltage value and the output voltage error using a value proportional to the reference current amplitude value.