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基于OB2532的原边反馈LED驱动电路设计

更新时间:2020-08-27 05:13:27 大小:554K 上传用户:守着阳光1985查看TA发布的资源 标签:ob2532led驱动电路 下载积分:5分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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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。

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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基于OB2532的原边反馈LED驱动电路设计.pdf 554K

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