基于软开关技术的单开关LED驱动电路研究

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Abstract This paper presented a new boost circuit based on soft-switch technique for LED driving applications. The driving circuit consists of only one switch and several other components. The main switch turns on or off under ZCS conditions, which results in high efficiency. This driving circuit can offer constant average output current independent of output voltage variations, and is especially suitable for LED driving uses. The average output current is related to the switching frequency, input DC voltage and resonant capacitor. For one specific LED driving circuit, the constant average output current corresponds to specific switching frequency, input DC voltage and Duty, and this makes it simple to design the control system. Fewer components needed in the circuit mean less cost, which is really important for both the manufacturers and customers.

Key words： LED driving circuit resonant circuit zero current switch switching loss soft- switching

Published: 22 January 2018

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	Articles by authors
	Li Dan
	Zhang Dairun
	Yang Lin

Cite this article:

Li Dan,Zhang Dairun,Yang Lin. Study on LED Driving Circuit with Single Switch based on Soft-switch Technique[J]. Electrical Engineering, 2017, 18(12): 58-61.

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http://dqjs.cesmedia.cn/EN/Y2017/V18/I12/58

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