| 无电解电容LED驱动电路 |
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| 引用本文： | 孙文婷,羊彦.无电解电容LED驱动电路[J].电子设计工程,2012,20(14):8-10. |
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| 作者姓名： | 孙文婷 羊彦 |
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| 作者单位： | 西北工业大学,陕西西安,710129 |
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| 摘 要： | 针对现有LED驱动电路存在电解电容限制寿命的不足,提出了一种无电解电容的LED驱动电路的设计方法。该方法采用Panasonic松下MIP553内置PFC可调光LED驱动电路的芯片,与外部非隔离底边斩波电路合成作为基本的电路结构,输出稳定的电流用以满足LED工作的需要。同时设计保护电路来保护负载。实验结果表明,控制器芯片能稳定工作,并且可以实现27 V的恒压输出和350 mA的恒流输出。
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| 关 键 词： | 电解电容 驱动电路 恒流 损耗 保护电路 |
LED drive circuit without electrolytic capacitor |
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| SUN Wen-ting,YANG Yan.LED drive circuit without electrolytic capacitor[J].Electronic Design Engineering,2012,20(14):8-10. |
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| Authors: | SUN Wen-ting YANG Yan |
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| Affiliation: | (Northwestern Polytechnical University,Xi’an 710129,China) |
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| Abstract: | In the current LED drive circuit,the electrolytic can decrease the service life.This article explains a design method of LED drive circuit without electrolytic capacitor.Using the Panasonic MIP553 with built-in PFC adjustable light LED driver,we can produce the stable current to meet the working requirements of LED when adopting non-isolated low-side chopper circuit as the basic circuit configuration.Zener diode circuit is adopted to protect the load.The experiment result shows that the controller chip can work stably to achieve a Constant voltage output for 27V or Constant current output for 350mA. |
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| Keywords: | electrolytic capacitors drive circuit constant current loss protective circuit |
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