Title :
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
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;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2009.2027251
