Interleaved parallel PFC control circuit and control method
A control circuit and control method technology, applied in the direction of electrical components, high-efficiency power electronic conversion, output power conversion devices, etc., can solve problems such as high cost and complex control system, achieve product cost control, simple circuit structure, and reduce control The effect of system complexity
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 The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.
 This embodiment is a specific application of the present invention in a boost converter. The boost converter includes a main circuit and an interleaved parallel PFC control circuit. The main circuit part includes a bridge rectifier circuit and a parallel PFC module. Such as Figure 4 As shown, the interleaved parallel PFC control circuit also includes a sampling module, a processing module, a comparison module, and a selection module. The sampling module is connected to the main circuit to sample signals, the selection module outputs a drive control signal, and the power switch tube of the parallel PFC module Perform on-off control.
 Please refer to Figure 5 , The parallel PFC module includes a first boost circuit and a second boost circuit, the first boost circuit includes a first inductor L1, a first diode D1,...
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