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| Double loop step-down LED drive power supply |
| Liu Yuanling, Wang Jinli, Jia Wenchao |
| School of Electronics&Information Engineering, Changchun Guanghua University, Changchun 130000 |
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Abstract LED lighting is a kind of clean green lighting lamp with low energy consumption and pollution environment without lead and mercury. The main working core of LED lighting is consistent with semiconductor devices. Therefore, LED lighting also needs low-voltage constant current driving. Stability of driving power supply work determines the stability of LED lighting, the stability of the power supply using the peak current control of LED lighting drive, because the negative temperature effect of voltage loop and LED lighting peak current interaction will lead to LED light flashing, shorten LED lighting time, so in the drive the peak current in the power circuit control link using current loop instead of voltage loop, while adding slope compensation in the peak current control link, strengthen the implementation of LED lighting drive power stability and anti-interference ability.
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Received: 06 February 2018
Published: 23 October 2018
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2018, Vol. 19 
