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1. (WO2018107620) PFC FLYBACK FULL BRIDGE-BASED SMART CORRECTION WAVE VOLTAGE CONVERSION CIRCUIT

Pub. No.:    WO/2018/107620    International Application No.:    PCT/CN2017/079186
Publication Date: Fri Jun 22 01:59:59 CEST 2018 International Filing Date: Sun Apr 02 01:59:59 CEST 2017
IPC: H02M 5/458
H02M 1/42
Applicants: GUANGDONG BESTEK E-COMMERCE CO., LTD
广东百事泰电子商务股份有限公司
Inventors: HE, Wei
何伟
Title: PFC FLYBACK FULL BRIDGE-BASED SMART CORRECTION WAVE VOLTAGE CONVERSION CIRCUIT
Abstract:
A power-factor correction (PFC) flyback full bridge-based smart correction wave voltage conversion circuit, comprising: an input unit (10); a PFC boosting unit (20); a flyback isolating converter unit (30), comprising a first switch tube (Q6), a transformer (T1), a first rectifying diode (D5), and a first electrolytic capacitor (C3); a first terminal of a primary winding of the transformer is connected to an output terminal of the PFC boosting unit, and a second terminal of the primary winding of the transformer is connected to a drain of the first switch tube, while a source of the first switch tube is connected to a front end ground (HGND1); a first terminal of a secondary winding of the transformer is connected to an anode of the first rectifying diode, while a second terminal of the secondary winding of the transformer is connected to a rear end ground, a cathode of the first rectifying diode acting as an output terminal of the flyback isolating converter unit; a phase inverting unit (60) is used for carrying out inversion conversion on an output voltage of the flyback isolating converter unit and then outputting an alternating current. The smart correction wave voltage conversion circuit may increase PF values and improve output voltage quality.