NDLI: A universal-input high-power-factor PFC pre-regulator without electrolytic capacitor for PWM dimming LED lighting application

Content Provider	IEEE Xplore Digital Library
Author	Hongbo Ma Wensong Yu Cong Zheng Jih-Sheng Lai Quanyuan Feng Bo-Yuan Chen
Copyright Year	2011
Description	Author affiliation: Future Energy Electronics Center, Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, USA (Wensong Yu; Cong Zheng; Jih-Sheng Lai; Bo-Yuan Chen) \|\| School of Information Science & Technology, Southwest Jiaotong University, Chengdu, Sichuan, China (Hongbo Ma; Quanyuan Feng)
Abstract	High brightness white LED has attracted a lot of attention for its high efficacy, simple to drive, environmentally friendly, long lifespan and small size. The power supply for LED lighting also requires long life while maintaining high efficiency, high power factor and low cost. However, a typical design employs electrolytic capacitor as storage capacitor, which is not only bulky, but also with short lifespan, thus hampering the entire LED lighting system. To prolong the lifespan of power supply, it has to use film capacitor with small capacitance to replace electrolytic capacitor. In this paper, a universal input high efficiency, high power factor LED driver is proposed based on the modified SEPIC converter. Along with a relatively large voltage ripple allowable in a PFC design, the proposal of LED lamp driver is able to eliminate the electrolytic capacitor while maintaining high power factor. To increase the efficiency of LED driver, the presented SEPIC-derived converter is modified further as the twin-bus output stage for matching ultra-high efficiency twin-bus LED current regulator. The operation principle and related analysis is described in detail. A 50-W prototype has been built and tested to verify the proposed LED Driver.
Starting Page	2288
Ending Page	2295
File Size	947267
Page Count	8
File Format	PDF
ISBN	9781457705427
e-ISBN	9781457705410
DOI	10.1109/ECCE.2011.6064072
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitors Multiple lighting LED lamps Switches Universal input voltage Light emitting diodes Electrolytic capacitor SEPIC-derived Inductors Reactive power PWM dimming Lighting Capacitance Power factor correction (PFC)
Content Type	Text
Resource Type	Article

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