NDLI: Analysis and design of a multi-channel constant current LED driver based on high frequency AC bus

Content Provider	IEEE Xplore Digital Library
Author	Shubo Zhi Quanming Luo Can Zou Luowei Zhou
Copyright Year	2012
Description	Author affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, 400044, China (Shubo Zhi; Quanming Luo; Can Zou; Luowei Zhou)
Abstract	With the significant development in the manufacturing process of LEDs, LEDs are promising for various lighting applications. In order to achieve better performance and higher reliability, the multiple LED strings structure is adopted in many applications, such as street lighting and tunnel lighting. This paper is aimed to describe a multi-channel constant current LED driver which is composed of a master AC source and some slave passive constant current sources according to the number of LED strings. The high frequency resonant inverter is controlled to operate as the master AC source, whose output forms the high frequency AC bus, each LED string is individually powered by its corresponding salve passive constant current source driven by the high frequency AC bus. By employing the LED's u-i model instead of the constant resistive load, the performance and characteristics of the driver are analyzed in detail and the experimental results are provided to verify the concept.
Starting Page	210
Ending Page	214
File Size	1044030
Page Count	5
File Format	PDF
ISBN	9781457720857
DOI	10.1109/IPEMC.2012.6258904
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-02
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Light emitting diodes Reliability Phosphors resonant converter Multi-Channel LED driver constant current driving
Content Type	Text
Resource Type	Article

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