A High-Efficiency Dimmable LED Driver for Low-Power Lighting Applications

Author

Chiu, Huang-Jen ; Lo, Yu-Kang ; Chen, Jun-Ting ; Cheng, Shih-Jen ; Lin, Chung-Yi ; Mou, Shann-Chyi

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan

Volume

57

Issue

2

fYear

2010

Firstpage

735

Lastpage

743

Abstract

This paper presents a dimmable light-emitting diode (LED) driver with adaptive feedback control for low-power lighting applications. An improved pulsewidth modulation dimming technique is studied for regulating the LED current and brightness. Under universal input voltage operation, high efficiency and high power factor can be achieved by a coupled inductor single-ended primary inductance converter power factor correction (PFC) converter with a simple commercial transition-mode PFC controller. The operation principles and design considerations of the studied LED driver are analyzed and discussed. A laboratory prototype is also designed and tested to verify the feasibility.

Keywords

PWM power convertors; light emitting diodes; low-power electronics; power factor correction; adaptive feedback control; coupled inductor single-ended primary inductance converter; high-efficiency dimmable LED driver; improved pulsewidth modulation dimming technique; low-power lighting applications; power factor correction converter; transition-mode PFC controller; Coupled inductor single-ended primary inductance converter power factor correction (SEPIC PFC); dimmable light-emitting diode (LED) driver; universal input voltage;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2009.2027251

Filename

5170095