基于MPS4021的30W LED驱动电源设计
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引用本文:罗中良,李曦雯,索剑,陈治明,黎馨楹.基于MPS4021的30W LED驱动电源设计[J].计算技术与自动化,2013,(3):30-33
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罗中良,李曦雯,索剑,陈治明,黎馨楹 (惠州学院广东 惠州516007) 
中文摘要:随着LED技术的日益成熟,LED已经被应用到很多领域,特别是在大功率商业照明领域,LED凭借其具有节能、长寿命、可靠性高、低成本等优点,充分地展现出高性价比的特点。本文设计一种反激式原边反馈低成本方案的驱动电源,在100-240V电压范围内输出电流精度达到±5%,功率因数大于0.9,效率大于85%,并具有过压、短路保护功能。通过分析其工作原理并对具体参数给出详细的计算过程。对LED驱动电源工程师在设计的过程中具有一定的参考价值。
中文关键词:原边反馈  MPS4021  LED电源
 
Design of 30W Power Supply for LED Driving Based on MPS4021
Abstract:with its getting mature gradually in technology, LED is being applied to different fields, especially in the high-power commercial lighting field, LED is of high quality-price ratio and popular since its energy-saving, long-lifetime, high reliability and low cost. A power supply for LED driving based on a low-cost fly-back primary side feedback scheme is designed in this paper. Its output-current error percentage is less than 5%, the power factor is larger than 0.9, the efficiency is larger than 85% in the voltage range of 200-240V. The current fold-back and over-voltage protective functions are also integrated in it, too. The detailed calculation of the circuit’s parameters based on an analysis of its operating principles is presented. This design can be a reference for high-power LED driving products.
keywords:primary side feedback  MPS4021  power supply for LED driving
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