A high-power-factor LED driver with zero-voltage switching-on characteristics

Author

Hung-Liang Cheng ; Cheng-Wei Lin ; Yong-Nong Chang ; Yao-Ching Hsieh

Author_Institution

Dept. of Electr. Eng., I-Shou Univ., Kaohsiung, Taiwan

fYear

2013

fDate

22-25 April 2013

Firstpage

334

Lastpage

339

Abstract

This paper proposes a high-efficiency LED driver consisting of interleaved buck-boost and buck converters. With no need to use any auxiliary reactive components, the active switches can operate at zero-voltage switching on (ZVS). The buck-boost converter is operated at discontinuous-conduction mode (DCM) to perform the function of power-factor correction (PFC). The buck converter regulates the output voltage to drive LEDs. A prototype 60-W LED driver is built and tested. Experimental results show that the switching losses can be effectively reduced by operating the active switches at ZVS. The measured power factor and circuit efficiency are as high as 0.99 and 93%, respectively.

Keywords

driver circuits; light emitting diodes; power factor correction; switches; switching convertors; zero voltage switching; DCM; PFC; ZVS; active switches; auxiliary reactive component; discontinuous-conduction mode; high-efficiency LED driver; high-power-factor LED driver; interleaved buck-boost converters; power-factor correction; switching loss; zero-voltage switching-on characteristics; Inductors; Light emitting diodes; Prototypes; Reactive power; Switches; Switching loss; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems (PEDS), 2013 IEEE 10th International Conference on

Conference_Location

Kitakyushu

ISSN

2164-5256

Print_ISBN

978-1-4673-1790-0

Electronic_ISBN

2164-5256

Type

conf

DOI

10.1109/PEDS.2013.6527040

Filename

6527040