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首页> 外文会议>Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE >Current driven synchronous rectifier with saturable current transformer and dynamice gate voltage control for LLC resonant converter
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Current driven synchronous rectifier with saturable current transformer and dynamice gate voltage control for LLC resonant converter

机译：具有饱和电流互感器和LLC谐振转换器的动态门电压控制的电流驱动同步整流器

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摘要

This paper proposes an improved current driven synchronous rectifier with saturable current transformer and dynamic gate voltage control feature for LLC resonant converter efficiency improvement. A model of saturable current transformer is proposed. Compared with other voltage driven and current-driven synchronous rectifier, this current driven synchronous rectifier has several outstanding characteristics. This synchronous rectifier is completely self-contained. It needs no external signal or power supply. It is also insensitive to parasitic inductance. Inherent dynamic gate voltage control reduces gate loss in the MOSFET by saturable current transformer. A 300W 400V-12V converter is built to demonstrate the advantages of the proposed current driven synchronous rectifier. High efficiency at 98% can be achieved. There is more than 4% efficiency improvement compared with schottky diode.
机译：本文提出了一种具有饱和电流互感器和动态栅极电压控制功能的改进型电流驱动同步整流器，以提高LLC谐振转换器的效率。提出了饱和电流互感器模型。与其他电压驱动和电流驱动同步整流器相比，该电流驱动同步整流器具有几个突出的特性。该同步整流器是完全独立的。它不需要外部信号或电源。它也对寄生电感不敏感。固有的动态栅极电压控制可通过饱和电流互感器减少MOSFET的栅极损耗。内置一个300W 400V-12V转换器来演示所提出的电流驱动同步整流器的优点。可以达到98％的高效率。与肖特基二极管相比，效率提高了4％以上。

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