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APPARATUS AND METHOD FOR SAMPLING INDUCTOR CURRENT OF BRIDGELESS PFC CIRCUIT
APPARATUS AND METHOD FOR SAMPLING INDUCTOR CURRENT OF BRIDGELESS PFC CIRCUIT
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机译:无桥PFC电路的电感电流采样的装置和方法
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摘要
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 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.
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