Elimination of an Electrolytic Capacitor in AC/DC Light-Emitting Diode (LED) Driver With High Input Power Factor and Constant Output Current

Author

Chen, Wu ; Hui, S. Y Ron

Author_Institution

Sch. of Electr. Eng., Southeast Univ., Nanjing, China

Volume

27

Issue

3

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

1598

Lastpage

1607

Abstract

While LEDs enjoy relatively long lifetime up to 10 years, the lifetime of traditional LED drivers using electrolytic capacitor as storage element is limited to typically less than 5 years. In this paper, an ac/dc LED driver without electrolytic capacitor is studied. Compared with other methods to eliminate electrolytic capacitor, the proposed driver has the advantages of almost unity input power factor and constant output current for LEDs. The operation principle, detailed design procedure of the main circuit, and control strategy are presented. The feasibility of the proposed converter has been successfully verified by experiments.

Keywords

driver circuits; electrolytic capacitors; light emitting diodes; power factor; AC-DC LED driver; AC-DC light emitting diode driver; constant output current; design procedure; electrolytic capacitor elimination; high input power factor; Capacitors; Converters; Driver circuits; Energy storage; Light emitting diodes; Power generation; Windings; AC/DC LED drivers; electrolytic capacitors; lifetime; light-emitting diodes (LEDs);

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2010.2103959

Filename

5762358