A Single-Switch AC-DC LED Driver Based on a Boost-Flyback PFC Converter With Lossless Snubber

被引：72

作者：

Lee, Sin-Woo ^{[1
]}

Do, Hyun-Lark ^{[1
]}

机构：

[1] Seoul Natl Univ Sci & Technol, Dept Elect & Informat Engn, Seoul 139743, South Korea

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2017年 / 32卷 / 02期

关键词：

Boost-flyback converter; LED driver; lossless snubber; power factor correction (PFC); HIGH-POWER-FACTOR; DESIGN; TRANSFORMER; CIRCUIT;

D O I：

10.1109/TPEL.2016.2549029

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：

A single-switch ac-dc light-emitting-diode (LED) driver based on boost-flyback power factor correction (PFC) converter with a lossless snubber is proposed. In the proposed LED driver, the boost PFC module is designed to be operated in the discontinuous-conduction mode to achieve a high power factor. The dc-dc flyback module is designed to provide input-output electrical isolation to improve safety. The lossless snubber circuit clamps the peak voltage spike of switch to a low voltage and the leakage inductor energy is recycled via the dc-dc flyback module. Additionally, a low-voltage-rating capacitor can be used as the dc-bus capacitor because some of the input power is directly conducted to the output; the remaining power is stored in the dc-bus capacitor. Therefore, the proposed LED driver can provide a high power factor and a high power conversion efficiency. These results are verified for an output of 48 V and 2 A for the experimental prototype.

引用

页码：1375 / 1384

页数：10

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