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이종규(Jong-kue Lee),윤흥식(Heung-Sik Yoon) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
The main purpose of this study is to develop current fed power supply for LED lighting that is controlled depending on control of current. LED is a device with a little variation of load when its operation is normal. For this study, a structure of current fed circuit for the LED power supply is proposed with the consideration of electric features of LED. IGBT, a switching device is used to generate constant current with control of on-off. In addition, the use IGBT was helpful to reduce switching loss as well as to simplify the circuits. For the experiment, a current fed power supply is designed and tested its characteristics of control of current under the condition of four 96W LED in parallel connection. As a result, its control of current is identified under this experimental circumstance.