Chengdu Monolithic Power Systems Co., Ltd.

Chuanhao Xu

Hao Wang

Pengfei Liu

A power factor control circuit for controlling a PFC circuit is disclosed. The PFC circuit is controlled to operate in one or more operation mode(s) (e.g., CCM, BCM, and DCM) in a single cycle of an input rectified voltage based on a load condition of the PFC circuit. The power factor control circuit includes a control reference circuit and a switching control circuit. The control reference circuit provides a peak current signal, a valley current signal and a turn-on delay signal based on a first current reference, a second current reference, and an input average current. The switching control circuit provides a switching control signal to control a dominant power switch of the PFC circuit based on a current sense signal, the peak current signal, the valley current signal, and the turn-on delay signal.

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Hangzhou, China

Chuanhao Xu