Design Considerations for Dual-Output Quasi-Resonant Flyback LED Driver With Current-Sharing Transformer

被引：66

作者：

Wu, Xinke ^{[1
]}

Wang, Zhaohui ^{[1
]}

Zhang, Junming ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2013年 / 28卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Current-sharing-transformer; dual output; flyback dc-dc; light-emitting-diode (LED) driver; CONVERTER;

D O I：

10.1109/TPEL.2012.2234480

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：

In this paper, a quasi-resonant (QR) flyback dual-output LED driver with current-sharing transformer (CST) is analyzed thoroughly. Although the CST is utilized to balance the currents in two LED strings, from the theoretical analysis, it shows that the parasitic capacitance of CST and its magnetizing inductance have a significant effect on the output current deviation and diode's voltage stress. In order to achieve the optimal current sharing ability between two outputs with minimum auxiliary components, a design guideline for the CST in QR flyback is proposed according to the theoretical analysis. A 100-W dual-output dc-dc prototype is built up to verify the theoretical analysis.

引用

页码：4820 / 4830

页数：11

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