Patent ID: 8116107
Filing Date: 2012-02-14
Classification: H02M,Y02B

Abstract:
1. A synchronous rectification control circuit assembly comprising: a first transformer, said first transformer having a primary side and a secondary side, said primary side comprising a first winding, said secondary side comprising a second winding, a third winding, a fourth winding and a fifth winding, said second winding and said third winding being connected in series to grounding potential, said first winding having two opposite ends thereof coupled to a driving signal, said second winding and said third winding being adapted to reverse the phase of said driving signal and to convert said driving signal into a second driving signal and a third driving signal respectively; a reference voltage generating circuit coupled to a first power source and adapted to generate a reference voltage subject to an output voltage; a first pulse width modulation control signal generating circuit coupled to a second power source and adapted to generate a first pulse width modulation control signal subject to said second driving signal and said reference voltage; a second pulse width modulation control signal generating circuit coupled to said second power source and adapted to generate a second pulse width modulation control signal subject to said third driving signal and said reference voltage; a first synchronous rectification circuit said first synchronous rectification circuit being controlled to output said output voltage through an output terminal thereof subject to the control of said first pulse width modulation control signal; and a second synchronous rectification circuit, said second synchronous rectification circuit being controlled to output said output voltage through an output terminal thereof subject to the control of said second pulse width modulation control signal; wherein when said output voltage rises, the conduction time of said first synchronous rectification circuit and said second synchronous rectification circuit are relatively regulated to maintain stability of said output voltage.