Patent ID: 6169683
Filing Date: 2001-01-02
Classification: H02M,Y02B

Abstract:
An externally driven synchronous rectifier circuit for a DC-to-DC power converter comprising: a primary transformer having a primary and secondary winding, said secondary winding having a first terminal and a second terminal; a first synchronous rectifier operably coupled to said first terminal of said secondary winding; a second synchronous rectifier operably coupled to said second terminal of said secondary winding; an external drive circuit operably coupled to said first and second synchronous rectifiers to provide timing signals to turn on and off said first and second synchronous rectifiers; an energy recovery circuit coupled to said first and second synchronous rectifiers and configured for storing energy associated with charging and discharging the input capacitance said first and second synchronous rectifiers; and an output voltage terminal coupled to said energy recovery circuit for receiving rectified voltage waveforms.