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求机器视觉光源控制器LED驱动芯片推荐,控制10 × 4个LED阵列,

Other Parts Discussed in Thread: TPS61195, LP8555, LM3402

电源输入24V,LED为 10 × 4个LED , 4个一组串联,共十组(见图1);

用的是cree的5MM灯珠,压降在3.2V左右 ,作电流为20MA。(参数见下图2)

要求可以通过输入一个模拟调节去控制LED阵列亮度,调节范围为0 --- 30MA


图1


图2