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http://dx.doi.org/10.6113/TKPE.2015.20.3.223

High Efficiency LED Driving System using Y type Current Balancing Transformer  

Kim, Jin-Gu (Dept. of Electrical & Electronics Eng., Kangwon National University)
Yoo, Jin-Wan (Dept. of Electrical & Electronics Eng., Kangwon National University)
Park, Chong-Yeon (Dept. of Electrical & Electronics Eng., Kangwon National University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.20, no.3, 2015 , pp. 223-231 More about this Journal
Abstract
LEDs have been widely used in lighting displays, automobiles, and airplanes owing to their excellent light output characteristics and long lifespan. Though LEDs are manufactured under the same process, variations in impurity concentrations cause electrical deviation among LEDs. The resulting electrical deviation can not only reduce the life time of the LED but also cause non-uniform luminance of LEDs connected in parallel. LED driving circuit is required to solve these problems. In this paper, we propose a LED driving system using Y-type current balancing transformer to maximize the efficiency of the system by removing output stage Schottky diodes. Experimental results are presented to verify the performance of proposed LED driving system that is applied to 80 W LED modules.
Keywords
LLC resonant Inverter; LED driving system; Y type balancing transformer;
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