| 一种两级式LED恒流驱动电源设计 |
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| 引用本文：胡国珍，马学军，陆小洲，彭剑.一种两级式LED恒流驱动电源设计[J].计算技术与自动化,2015,(1):44-47 |
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| 中文摘要:根据LED驱动电源设计要求，对设计方案进行合理论证，前级功率因素校正采用升压型斩波电路，控制芯片采用仙童公司的FAN7527，后级采用隔离式单端反激电路实现降压型DC/DC变换，控制芯片为TI公司的UC3843；此外为满足LED驱动电源恒流输出特性，设计中采用AP4310设计一个恒流限压控制器。基于以上结构，完成一款实验样机，通过测试和分析，实验波形与理论波形基本一致，完成本次设计要求的性能指标。 |
| 中文关键词:LED DC/DC变换；功率因素；UC3843 恒流 |
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| Design and Realization of LED Constant Current Driver |
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| Abstract:According to the design requirements of LED Current drirer, this design plan for a reasonable argument. The first stage power of factor correction adopted boost chopper circuit and its control chip is Fairchild's FAN7527. Isolated single-ended flyback circuit buck type DC/DC converter was used as the second stage and its controller chips is TI's UC3843. In addition, to meet the output characteristics of constant current ,AP4310 was designed as constant current controller. Based on the above structure, experimental prototype of LED driver was realized. Through testing and analysis, experimental waveforms were consistent with the theoretical waveform and the proposed LED driver meets the design requirements. |
| keywords:LED DC / DC conversion power factor correction UC3843 constant current |
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