Multi-string AC-powered LED Driver with Current Regulation Reduction based on Simple Circuitry
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概要
- 論文の詳細を見る
In this letter, a new simple circuitry LED driver with current reduction is proposed, realized and experimentally validated. The proposed circuit comprises with very few components intended for making a cost-effective and compact design while still shows a high performance. The circuit reduces non-conducting time of LEDs to enhance power factor (PF) and total harmonic distortion (THD).The flicker can also be relatively reduced. By using current limiter cells, lighting variation is eliminated with respect of the variation of AC input voltage. A worst case of a 4 W with only two LED-strings driver is implemented and tested by using a 1um 650V-BCDMOS high voltage process to verify advantageous characteristics of the suggested scheme. Experimental results demonstrate a PF of 0.97 with a THD of 24.62% and an efficiency of 87.1% at a 220V AC supply.
- The Institute of Electronics, Information and Communication Engineersの論文
著者
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Nguyen Van
Department Of Anesthesiology University Of Virginia Health System
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Song Hanjung
Department of Nano Engineering, Center for Nano Manufacturing, Inje University
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Seo Kilsoo
Power Semiconductor Research Center, KERI
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Jung Jinwoo
MagnaChip Semiconductor, Ltd.
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Park Ju-sung
Department of Electronic Engineering, Busan University
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