Zte Corporation

Junkai Li

Dan Li

Dacheng Zheng

Binchuan Dai

Zhenghai Wan

Xifeng Pu

Disclosed are an induction current sampling device and method for a bridgeless PFC circuit. The device includes a first sampling unit, a second sampling circuit and a third sampling circuit, wherein the first sampling unit, connected in serial with a first switch transistor of the bridgeless PFC circuit, is configured to sample a current flowing through the first switch transistor to acquire a first sampling signal V; the the second sampling unit, connected in serial with a second switch transistor of the bridgeless PFC circuit, is configured to sample a current flowing through the second switch transistor to acquire a second sampling signal V; and the third sampling unit, with one terminal connected with a ground of the bridgeless PFC circuit and the other terminal connected with a negative output of a PFC capacitor of the bridgeless PFC circuit, is configured to sample a current flowing through a boost diode of the bridgeless PFC circuit to acquire a third sampling signal V

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Shenzhen, China

Junkai Li