Patent ID: 6038148
Filing Date: 2000-03-14
Classification: H02M,Y02B

Abstract:
A self-driven synchronous rectifier circuit for a power converter, said circuit comprising:a transformer having a primary and secondary winding, said secondary winding having a first terminal and a second terminal;a first synchronous rectifier coupled to said second transformer terminal and having a control terminal;a second synchronous rectifier coupled to said first transformer terminal and having a control terminal;a first switch coupled to said first synchronous rectifier control terminal;a second switch coupled to said second synchronous rectifier control terminal; and said first and second switch being coupled to said secondary winding, wherein said first and second switches are connected to said first synchronous rectifier and said second synchronous rectifier, respectively, such that switching transitions of said first and second synchronous rectifiers are initiated by a polarity reversal of the voltage of said secondary transformer winding.