Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)
- Volume 25 Issue 5
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- Pages.7-14
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- 2011
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- 1229-4691(pISSN)
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- 2287-5034(eISSN)
DOI QR Code
Design of New LED Operation Drive Using Compensating Circuit for Transformed Voltage
전압 변동분 보상회로를 이용한 새로운 LED 구동드라이브 설계
- Received : 2011.01.10
- Accepted : 2011.04.08
- Published : 2011.05.31
Abstract
Currently high power Light Emitting Diode (LED) is in the limelight due to its characteristics of long durability, low maintenance costs, and high efficiency. Furthermore, it does not emit pollutants or poisonous gases and is a light source not using mercury, so it holds a high status in eco-friendly terms as well. In this paper, we studied a two-stage LED power drive circuit that can compensate only voltage regulation through LED output current, in order to improve efficiency of LED drive with constant current control in accordance with changes in temperature. The proposed LED drive has an advantage of reducing LED drive's voltage losses by controlling only voltage change of input power, compared with an existing circuit which controls input voltage. The suggested non-insulation compensating circuit for voltage change was verified to have improved efficiency relative to a LED drive using existing DC/DC converter.