Patent ID: 9331562
Filing Date: 2016-05-03
CPC Classification: H02M,Y02B,Y02P

Claim Text:
1. A power-factor converter with nonlinear conversion ratio, comprising: a rectifier circuit; a first inductor, having a first terminal coupled to a first terminal of an AC power source, and a second terminal coupled to a first input terminal of the rectifier circuit; a second inductor, having a first terminal coupled to a second terminal of the AC power source, and a second terminal coupled to a second input terminal of the rectifier circuit; and a switch circuit, comprising: a first bidirectional switch, having a first terminal coupled to the first terminal of the first inductor, and a second terminal coupled to the second terminal of the second inductor; and a second bidirectional switch, having a first terminal coupled to the first terminal of the second inductor, and a second terminal coupled to the second terminal of the first inductor, wherein the first bidirectional switch and the second bidirectional switch are turned on and turned off simultaneously, the first bidirectional switch and the second bidirectional switch keep turning on in an inductor-charging phase, and the first bidirectional switch and the second bidirectional switch keep turning off in an inductor-discharging phase, wherein the power-factor converter is in the inductor-charging phase while at least one of the first inductor and the second inductor is being charged.