Patent ID: 7061776
Filing Date: 2006-06-13
Classification: H02M,Y02B

Abstract:
1. A half-bridge flyback power converter, comprising: a transformer, having a primary winding and a secondary winding, wherein said secondary winding is coupled to a secondary circuit; wherein a first terminal of said primary winding and a first terminal of said secondary winding have same polarity; a high-side switch; a low-side switch, wherein said high-side switch is coupled between an input voltage and a second terminal of said primary winding; wherein said low-side switch is coupled between said first terminal of said primary winding and a ground reference level; a first flyback diode, wherein an anode of said first flyback diode is coupled to said ground reference level; wherein a cathode of said first flyback diode is coupled to said second terminal of said primary winding; a second flyback diode, having an anode coupled to said first terminal of said primary winding; a bulk capacitor, wherein a positive terminal of said bulk capacitor is coupled to a cathode of said second flyback diode; wherein a negative terminal of said bulk capacitor is coupled to said ground reference level; and a forward diode, having a cathode coupled to said input voltage and an anode coupled to said positive terminal of said bulk capacitor.