Evaluation of synchronous-rectification efficiency improvement limits in forward converters
Evaluation of synchronous-rectification efficiency improvement limits in forward converters
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DOI：
10.1109/41.402478
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发表时间：
1995-08
期刊：
影响因子：
--
通讯作者：
M. Jovanovic;Michael T. Zhang;F. Lee
中科院分区：
文献类型：
--
作者：
M. Jovanovic;Michael T. Zhang;F. Lee
提出了具有同步整流器的正向功率转换器的不同实现的设计权衡，并评估了同步整流器驱动方法对转换效率的影响。具体来说，讨论了具有自驱动同步整流器的功率转换器的 RCD 钳位和有源钳位复位方法的优点和局限性。得出了所讨论的同步整流方法相对于肖特基二极管实现的效率改进上限的估计。最后，对离线 3.3 V/20 A 正向功率转换器功率级的效率进行了实验比较，并与理论估计值进行了比较。 >
Design trade-offs for different implementations of the forward power converter with synchronous rectifiers are presented, and effects of the synchronous rectifier driving method on the conversion efficiency are evaluated. Specifically, the merits and limitations of the RCD-clamp and active-clamp reset approaches for a power converter with self-driven synchronous rectifiers are discussed. Estimates of the upper limits of the efficiency improvements of the discussed synchronous rectification approaches relative to the Schottky diode implementation are derived. Finally, experimental comparisons of efficiencies for an offline, 3.3 V/20 A forward power converter power stage are presented and compared with the theoretically estimated ones. >