Journal of Industrial Technology (산업기술연구)
- Volume 32 Issue A
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- Pages.103-107
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- 2012
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- 1229-9588(pISSN)
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- 1598-1371(eISSN)
LED Driver by the Low Cost DSP
저가형 DSP를 이용한 LED 구동회로
- Published : 2012.02.29
Abstract
Due to improvement of the semiconductor technology, the LED replaces the conventional lighting source and LED drivers have been studied and developed. The LED is driven by the constant current control method according to its characteristics. For the constant current control method, the linear regulator and the switching regulator is used. The switching regulator is usually used to LED drivers because it has specific characteristics as the wide input dynamic range and the high efficiency. In this paper, we have described the principle and the implement of the switching regulator, using the drive IC and the low cost DSP chip. Also, both methods have been implemented and its electrical characteristics had almost same experimental results in the steady state and the transient state.