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LED负载恒流驱动电源电路的研究

更新时间:2020-05-28 09:07:56 大小:1M 上传用户:songhuahua查看TA发布的资源 标签:led 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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提出一种由过零检测电路、可控硅整流电路、高频滤波电路与PWM隔离驱动电路组成的非隔离驱动方式的高效LED驱动电源电路。通过可控硅整流器(SCR)控制角α的程控调节与隔离驱动PWM占空比的自适应负载变化,分别实现LED负载恒流驱动的粗调与细调。对各电路模块的仿真与LED负载电流调节实验均验证了系统设计的正确性。

A non-isolated efficient LED driving circuit was proposed,which consists of the zero-crossing detection circuit,SCR commute circuit,high-frequency filtering circuit and PWM isolated driving circuit.Through program-controlled regulation of SCR control angle α and adaptive load change of the PWM duty cycle,both general and fine tuning of LED constant-current driving were realized. Simulating every circuit module and experimenting on the LED load current regulation verify the validity of the system design.

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LED负载恒流驱动电源电路的研究.pdf 1M

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