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高显色指数LED驱动电路的设计

更新时间:2020-08-02 04:17:35 大小:479K 上传用户:六3无线电查看TA发布的资源 标签:led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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针对医疗设备中常用卤钨灯光源存在的不足,提出一种基于可调光源的高显色指数LED驱动电路的解决方案。电路由LED驱动和电源管理等部分组成,通过采用PWM调光方式,实现LED驱动电流从20.7-339 mA连续可调,电路具有充电管理和多级电量显示功能。实验表明电路结构简单,性能良好,具有易于实现,通用性强等特点,可广泛应用于便携式医疗器械。

Aiming to the defects of tungsten halogen light source in many medical apparatus at the present, a driver scheme was proposed based on the adjustable and high color rendering index LED light source. The scheme's circuit was made up of LED drive and power management. The dimming circuit adopted PWM control and the drive current of LED could change from 20.7 mA to 339 mA continuously. The circuit has functions of charging management and multistage power display. The experiments show that the structure of this circuit is simple with good performance. It is easy to implement with strong universality, which can be widely applied to some portable medical devices.

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高显色指数LED驱动电路的设计.pdf 479K

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