Single-switch ZVZCS quasi-resonant CLL isolated DC-DC converter for 32” LCD TV

被引：0

作者：

Ryu, Seung-Hee ^{[1
]}

Ahn, Jung-Hoon ^{[1
]}

Cho, Kwang-Seung ^{[1
]}

Lee, Byoung-Kuk ^{[1
]}

机构：

[1] College of Information and Communication Engineering, Sungkyunkwan University

来源：

Journal of Electrical Engineering and Technology | 2015年 / 10卷 / 04期

关键词：

Isolated dc-dc converter; LED backlighting LCD TV; Single-switch quasi-resonant; Zero-voltage and zero-current switching (ZVZCS);

D O I：

10.5370/JEET.2015.10.4.1647

中图分类号：

学科分类号：

摘要：

In this paper, a single-switch ZVZCS quasi-resonant CLL isolated DC-DC converter for driving a low-power (less than 100 W) 32'' LED backlighting liquid crystal display television (LCD TV) is proposed. The proposed converter exhibits both forward and flyback operational characteristics. All semiconductors are activated and deactivated under the soft switching conditions during the switching transition without additional active devices. The switching frequency varies less than about 10 kHz for load variations, leading to minimizing the efficiency reduction under light load. Furthermore, the low di/dt and dv/dt by soft switching enhance the electromagnetic interference (EMI) performance above 1 MHz. A theoretical analysis is described in detail, and a 72-W prototype converter verifies the validity of the analysis. © 2015 The Korean Institute of Electrical Engineers.

引用

页码：1647 / 1655

页数：8