A Universal-Input Single-Stage High-Power-Factor Power Supply for HB-LEDs Based on Integrated Buck-Flyback Converter

被引：176

作者：

Gacio, David ^{[1
]}

Marcos Alonso, J. ^{[1
]}

Calleja, Antonio J. ^{[1
]}

Garcia, Jorge ^{[1
]}

Rico-Secades, Manuel ^{[1
]}

机构：

[1] Univ Oviedo, Dept Elect Engn, Gijon 33204, Spain

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2011年 / 58卷 / 02期

关键词：

Buck-flyback converters; closed-loop operation; electronic ballast; high-brightness light-emitting diode (HB-LED); LED lighting; offline application; power-factor correction (PFC); small-signal modeling; two-stage integrated converter; FACTOR ELECTRONIC BALLAST; RESONANT INVERTER;

D O I：

10.1109/TIE.2010.2046578

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Due to the high rise in luminous efficiency that high-brightness light-emitting diodes (HB-LEDs) have experienced in recent years, many new applications have been researched. This paper covers a streetlight LED application using the offline integrated buck-flyback converter (IBFC) developed in previous works. In this application, the converter is used to provide power-factor correction from a universal ac source. A control loop using the LM3524 IC has been implemented for testing the feasibility of Enabling pulsewidth modulation dimming mode. First, the LED load has been linearized and modeled in order to calculate the IBFC topology properly. Second, the converter has been designed and tested at the laboratory. The converter has also been modeled in order to design a fixed-frequency constant-current control. The dynamics of all the stages involved in the closed loop have been taken into account in order to develop an adequate controller. Finally, the experimental results obtained from the laboratory tests are discussed.

引用

页码：589 / 599

页数：11

共 25 条

[1] Investigation of a new control strategy for electronic ballasts based on variable inductor [J].