PFC STAGGERED FLYBACK FULL BRIDGE-BASED SMART CORRECTION WAVE VOLTAGE CONVERSION CIRCUIT

摘要

A PFC staggered flyback full bridge-based smart correction wave voltage conversion circuit, comprising: an input unit (10); a PFC boost unit (20); a staggered flyback isolation transformer unit (30), comprising a first switch transistor (Q6), a second switch transistor (Q7), a first transformer (T1), a second transformer (T2), a second rectifying diode (D7) and a third rectifying diode (D8), a first end of a primary winding of the first transformer (T1) and a first end of a primary winding of the second transformer (T2) both being connected to an output terminal of the PFC boost unit (20), a second end of the primary winding of the first transformer (T1) being connected to a drain electrode of the first switch transistor (Q6), a second end of the primary winding of the second transformer (T2) being connected to a drain electrode of the second switch transistor (Q7), and a cathode of the second rectifying diode (D7) and a cathode of the third rectifying diode (D8) forming a staggered flyback isolation transformer unit input terminal after being connected; a DC filter unit (40); and an inverter unit (60). The present conversion circuit can decrease ripple interference and increase output voltage quality.