Tapped-inductor buck converter for high-step-down DC-DC conversion

被引：214

作者：

Yao, KW ^{[1
]}

Ye, M

Xu, M

Lee, FC

机构：

[1] Monolith Power Syst, Los Gatos, CA 95032 USA

[2] SynQor, Dallas, TX 75238 USA

[3] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2005年 / 20卷 / 04期

基金：

美国国家科学基金会;

关键词：

high-step-down dc-dc converter; lossless clamp circuit; tapped inductor;

D O I：

10.1109/TPEL.2005.850920

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The narrow duty cycle in the buck converter limits its application for high-step-down dc-dc conversion. With a simple structure, the tapped-inductor buck converter shows promise for extending the duty cycle. However, the leakage inductance causes a huge turn-off voltage spike across the top switch. Also, the gate drive for the top switch is not simple due to its floating source connection. This paper solves all these problems by modifying the tapped-inductor structure. A simple lossless clamp circuit can effectively clamp the switch turn-off voltage spike and totally recover the leakage energy. Experimental results for 12 V-to-1.5 V and 48 V-to-6 V dc-dc conversions show significant improvements in efficiency.

引用

页码：775 / 780

页数：6

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