《半桥电源，输出30V，电流20A，用同步整流方式》.pdf

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 16, NO. 6, NOVEMBER 2001 803 A New Driving Scheme for Synchronous Rectifiers: Single Winding Self-Driven Synchronous Rectification Pedro Alou, Jose A. Cobos, Member, IEEE, Oscar García, Member, IEEE, Roberto Prieto, Member, IEEE, and Javier Uceda, Senior Member, IEEE Abstract—Single winding self-driven synchronous rectification interleaved synchronous Buck, they are also an interesting so- (SWSDSR) approach is a new driving circuit that overcomes lution since input voltage is higher. the limitations of the traditional driving schemes, becoming When topologies with transformer are used in these applica- an interesting alternative to supply new electronic loads as microprocessors. Traditional self-driven synchronous rectification tions, one of the more important issues is how to drive the syn- (SDSR) technique has shown very good performance to improve chronous rectifiers (SRs). This paper presents a new self-driven efficiency and thermal management in low-voltage low-power synchronous rectification (SDSR) scheme very interesting for dc/dc converters, however it can not be extended to the new fast the new low voltage, fast dynamic specifications, it is the single dynamic, very low voltage applications. winding self-driven synchronous rectification (SWSDSR) ap- SWSDSR scheme is based on an additional winding in the power transformer (auxiliary winding). It allows for maintaining the syn- proach. chronous rectifiers (SRs) on even when the voltage in the trans- Traditional SDSR scheme has been successfully