提高同步整流降压变换器的轻载效率

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.1999.749651

Xunwei Zhou, M. Donati, L. Amoroso, F. Lee

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引用次数: 22

摘要

在许多低压应用中，如电池供电系统和微处理器电源-稳压模块(VRM)，需要在非常宽的负载范围内具有高效率的DC/DC转换器。为了提高低压电源变换器的效率，同步整流技术得到了广泛的应用。该技术的缺点是轻载时效率低。本文提出了一种实现简单、提高轻载效率的新技术。由于不需要电流传感器，因此可以实现高密度和高效率，使整个电路适合集成。文中给出了两个应用实例。实验结果表明，该技术显著提高了同步整流降压变换器的轻载效率。

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Improve light load efficiency for synchronous rectifier buck converter

A DC/DC converter with high efficiency over very wide load range is necessary for many low voltage applications, such as battery supplied systems and microprocessor power supplies-voltage regulator module (VRM). In order to improve the efficiency of low-voltage power converters, synchronous rectifier technology is widely used. The disadvantage of this technology is low efficiency at light load. This paper proposes a new technology that can improve light load efficiency with very simple implementation. Since current sensors are not required, high density and high efficiency can be achieved that makes the whole circuit suitable for integration. In the paper, two application examples are given. Experimental results verified that this technology significantly improves synchronous rectifier buck converters light load efficiency.

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

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