| 基才OB2532的原边反馈LED驱动电路设计 |
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| 引用本文： | 张涛,张献中.基才OB2532的原边反馈LED驱动电路设计[J].电子设计工程,2013(22):105-107,114. |
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| 作者姓名： | 张涛 张献中 |
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| 作者单位： | 武汉科技大学信息科学与工程学院,湖北武汉430081 |
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| 摘 要： | 文中应用高性能离线式PWM控制器OB2532，设计了一款小功率LED驱动电路，电路采用原边反馈方式。与传统的副边反馈相比，原边反馈驱动电路省去了光耦和TIA31芯片，降低了成本，提高了系统的可靠性。所设计的LED驱动电路具有恒压恒流控制特性。实测的结果来表明：4个1W的白光LED正常工作，亮度非常高，测试参数达到设计要求。
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| 关 键 词： | 发光二极管 原边反馈 脉宽调制 OB2532 |
Design of the primary-side feedback LED driver circuit based on OB2532 |
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| ZHANG Tao,ZHANG Xian-zhong.Design of the primary-side feedback LED driver circuit based on OB2532[J].Electronic Design Engineering,2013(22):105-107,114. |
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| Authors: | ZHANG Tao ZHANG Xian-zhong |
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| Affiliation: | (College of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China) |
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| Abstract: | In this paper, a small power LED driving circuit is designed based on high performance off-line PWM controller OB2532. The driving circuit has a primary-side feedback characteristics. Compared with the traditional feedback mode compared, the optical coupling and TLA31 chip are left out in the primary-side feedback driver circuit. The cost of driving circuit is reduced, and the reliability of the system is improved. The LED drive circuit has constant voltage/current control characteristics. Experimental results show： four 1W white light LED can normally work, and has very high brightness. Test parameters meet the design requirements. |
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| Keywords: | LED primary-side feedback pulse-width modulation OB2532 |
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