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求一款LED用恒流源芯片

Other Parts Discussed in Thread: LM3464, LM3409

希望输出电流可以达到3A,可以通过外部控制信号(频率可达60kHZ)来控制芯片电流的输出与截止,并且可以通过模拟电压来控制输出电流的大小。