自驱动同步整流器的新驱动方案

APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285) Pub Date : 1999-03-14 DOI:10.1109/APEC.1999.750466

J. Cobos, P. Alou, Ó. García, J. Uceda, M. Rascon

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引用次数: 39

摘要

自驱动同步整流(SDSR)是提高低输出电压变换器效率和热管理的一种很好的技术。本文提出了一种驱动同步整流器的新方案。它允许即使在变压器中的电压为零时也保持SRs开启，这在传统的自驱动方法中是不可能做到的。即使在输出电压低于3.3 V(即1.5 V)的应用中，也可以正确驱动SRs。此外，驱动损耗非常低，因为一个MOSFET的放电用于给另一个MOSFET充电，反之亦然。该方案已在两个样机中得到验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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New driving scheme for self driven synchronous rectifiers

Self-driven synchronous rectification (SDSR) is a very good technique to improve efficiency and thermal management in low output voltage converters. In this paper, a new scheme to drive the synchronous rectifiers (SRs) is proposed. It allows for maintaining the SRs on even when the voltage in the transformer is zero, which is impossible to do in traditional self-driven approaches. It also makes possible to drive properly the SRs even for applications where output voltage is lower than 3.3 V, namely 1.5 V. Furthermore, driving losses are very low, since the discharge of one MOSFET is used to charge the other and vice versa. This scheme has been validated in two prototypes.

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APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)

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