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求一款LED恒流驱动芯片

现在因为项目需要,想选择一款LED驱动芯片。

该芯片能够为3个LED提供驱动,分时驱动,分别设置不同的电流,3个LED灯的电流不需要多大,大概在几十mA就可以。

还请大家帮忙。