| 基于MPS4021的20W LED驱动电源设计 |
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| 引用本文： | 周有平,罗中良,陈国杰.基于MPS4021的20W LED驱动电源设计[J].西安航空技术高等专科学校学报,2013(5):43-46. |
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| 作者姓名： | 周有平 罗中良 陈国杰 |
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| 作者单位： | [1]佛山科学技术学院理学院,广东佛山528000 [2]惠州学院计算机系,广东惠州516007 |
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| 基金项目： | 佛山市科技发展专项（2011AA100041）; 广东省科技计划项目（2011B010200030,2012B010100038）; 佛山市产学研专项资金项目（2012HC100031）; 惠州市科技计划项目（2011C020005005）; 惠州学院校级重点项目（2012D06） |
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| 摘 要： | 采用原边反馈方案设计出一款20W LED驱动电源,通过变压器初次级隔离省去了副边反馈电路,提高了驱动电源的安全性和可靠性,并节约了BOM成本。所设计的驱动电源实现了在全电压范围内输出电流精度达±5%、功率因数大于0.9、效率大于85%,使用寿命大于3万小时,电磁干扰符合EN55015限制要求,并且具备有过流保护和过压保护功能,对设计大功率LED驱动电源具有一定的参考价值。
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| 关 键 词： | MPS 4021 LED驱动电源 原边反馈 变压器设计 |
Design of 20W Power Supply for LED Driving Based on MPS4021 |
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| ZHOU You-ping,LUO Zhong-liang,CHEN guo-jie.Design of 20W Power Supply for LED Driving Based on MPS4021[J].Journal of Xi'an Aerotechnical College,2013(5):43-46. |
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| Authors: | ZHOU You-ping LUO Zhong-liang CHEN guo-jie |
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| Institution: | 1. College of Science, Foshan University, Foshan 528000, China; 2. Department of Computers, Huizhou University, Huizhou 516007, China) |
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| Abstract: | A 20W power supply for LED driving is designed based on the primary side feedback scheme in this paper.The primary side and secondary side are isolated with a transformer and the secondary feedback circuit is omitted,so that the safety and reliability of this product is improved,the BOM cost is also cut.The output-current error percentage of the designed power supply for LED driving is less than 5%,the power factor is larger than 0.9,the efficiency is larger than 85% in the all voltage range,and the operational life span is over 30000 hours.The electromagnetic interference is in conformity with the EN55015 requirements.The current foldback and over-voltage protective functions are also integrated in it,too.This design can be a reference for high-power LED driving products. |
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| Keywords: | MPS4021 power supply for LED driving primary side feedback transformer design |
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