KIEE - The Transactions of the Korean Institute of Electrical Engineers

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The Transactions of the Korean Institute of Electrical Engineers

The Transactions of the Korean Institute of Electrical Engineers

ISO Journal TitleTrans. Korean. Inst. Elect. Eng.

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Title	A New LED Current Balancing Scheme Using Double-Step-Down DC-DC Converter
Authors	김기수(Kim, Kisu) ; 도 득 뜨완(Do, Duc Tuan) ; 김흥근(Kim, Heung-Geun) ; 차헌녕(Cha, Honnyong)
DOI	https://doi.org/10.5370/KIEE.2017.66.10.1474
Page	pp.1474-1480
ISSN	1975-8359
Keywords	Capacitor ; Current balancing ; Current regulator ; Double-step-down ; LED driver
Abstract	This paper presents a new LED current balancing scheme using double-step-down dc-dc converter. With the proposed structure, the two channel LED currents are automatically balanced without using any dedicated control or auxiliary circuit. In addition, switching loss of the switching devices in the proposed LED driver is lower than that of the conventional buck LED driver. To verify the operation of the proposed LED driver, a hardware prototype is built and tested with different number of LED.

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