Patent ID: 8995153
Filing Date: 2015-03-31
Classification: H02M,Y02B

Abstract:
1. A passive power factor correction circuit, comprising: a power supply; a rectifier, coupled to the power supply for rectifying the power supply and generating an input current; a filtering device comprising a filtering inductor, for reducing high order harmonic of the input current; a resonance device comprising a first inductor and a first capacitor connected in parallel, and coupled to the filtering device for controlling operation time of the input current; and a suppression device, coupled to the resonance device and coupled to a load for suppressing ripple of the input current, the suppression device further comprising a second inductor connected to the load in serial and a diode connected to the load in parallel; wherein when the passive power factor correction circuit operates in a first mode, a voltage cross the second inductor is greater than a voltage of the load, and thereby, the diode turns on and the first inductor is charged by the first capacitor.