Power factor correction circuit and electronic equipment

The invention relates to the technical field of electronic circuits, and discloses a power factor correction circuit and electronic equipment. The power factor correction circuit comprises a drive circuit, a boost circuit, a switching circuit and an absorption circuit. A main switching tube in the b...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: ZHOU MANZHI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention relates to the technical field of electronic circuits, and discloses a power factor correction circuit and electronic equipment. The power factor correction circuit comprises a drive circuit, a boost circuit, a switching circuit and an absorption circuit. A main switching tube in the boosted circuit works in an on state or an off state according to a driving signal generated by the driving circuit; when the main switching tube is switched from the on state to the off state, a parasitic capacitor of the main switching tube discharges to close the switching circuit, the switching-on of the switching circuit enables the main switching tube not to be switched on again when the switching circuit is switched off, and the absorption circuit absorbs the electric energy released by the parasitic capacitor of the main switching tube and releases the electric energy through the switching circuit to maintain the closed state of the switching circuit. In this way, the hidden danger ofsecondary switching-on w