Method and apparatus for damping ringing in self-driven synchronous rectifiers

A power converter, comprising:

• a primary side power circuit for receiving an input voltage;
• a secondary side power circuit, coupled to said primary side power circuit, for supplying an output voltage, comprising:
• first and second synchronous rectifiers each having a source, drain and gate, said first and second synchronous rectifiers are coupled together such that said drain of said first synchronous rectifier is coupled to said gate of said second synchronous rectifier and said drain of said second synchronous rectifier is coupled to said gate of said first synchronous rectifier;
• and
• a damping drive circuit coupled to said first and second synchronous rectifiers comprising:
• first and second switches, each having a source, drain and gate, said first and second switches are coupled together, such that said drain of said first switch is coupled to said gate of said second switch and said drain of said second switch is coupled to said gate of said first switch, wherein said first switch is active when said first synchronous rectifier is active and said second switch is active when said second synchronous rectifier is active.