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PFCM Design Guide with Analog PFC IC



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PFCM Design Guide with Analog PFC IC

Member: baskaran7929 Added: Feb 16, 2011 Category: Product Manuals

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An inrush-current prevention circuit is required due to the large DC link capacitance as shown in Fig. 1. The relay of the circuit should be closed after DC link capacitor is charged far enough. PFCM, mini-SPM and control IC can share single GND stage. Usually, this GND and the NSENSE terminal of PFCM should have the same potential. Large surge voltage is easily produced between P and N terminals by large current switching. To reduce surge voltage it is important to shorten the DC link bus wiring between PFCM and DC link capacitor. In addition, good high frequency characteristic capacitor, such as polypropylene film capacitor should be mounted near to P and N terminals as a snubber.

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PFCM Design Guide with Analog PFC IC