High power factor LED power supply based on SEPIC converter

Author

Gao Tian ; Wang Qi ; Yang Yan ; Yan Zhong Jiang

Author_Institution

Sch. of Electron. & Inf., Northwestern Polytech. Univ., Xi´an, China

Volume

50

Issue

24

fYear

2014

fDate

11 20 2014

Firstpage

1866

Lastpage

1868

Abstract

A single-ended primary inductor converter (SEPIC)-based light-emitting diode (LED) power supply, which can achieve power factor correction (PFC) and constant-current drive for LED in the critical conduction mode (CRM), is presented. The circuit principle is described in detail. Meanwhile the formulas for metal-oxide semiconductor field-effect transistor switch-on time, switching frequency and the main influences of power factor are given. Experimental results show that the power can drive the LED with high efficiency by virtue of its high power factor, low power loss and stable output. Furthermore, it can be applied to low-power lighting occasions with simple structure and high reliability.

Keywords

field effect transistor switches; inductors; light emitting diodes; lighting; power MOSFET; power convertors; power factor correction; CRM; PFC; SEPIC converter; constant-current drive; critical conduction mode; high power factor LED power supply; light-emitting diode power supply; low-power lighting occasions; metal-oxide semiconductor field-effect transistor switch-on time; power factor correction; single-ended primary inductor converter;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2014.1925

Filename

6969225