Oppedahl Patent Law Firm LLC
Induction current sampling device and method for bridgeless PFC circuit
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 V1; 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 V2; 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 V3. 
ZTE CORPORATION
H H H H H G G Y H H Y
H02M H02M H02M H02M H02M G01R G01R Y02P H02M H02M Y02B
inventional inventional inventional inventional inventional inventional inventional additional inventional additional additional
Dan Zhenghai Dacheng Xifeng Binchuan Junkai
Li Wan Zheng Pu Dai Li