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LM3445调光电路FLTR2引脚问题

Other Parts Discussed in Thread: LM3445

我们现在在使用LM3445制作一款可控硅调光电源产品,现在发现接上调光器并且调光器调到最小时,启动时会出现电流过冲。我们尝试把FLTR2引脚直接接地,还是会出现电流过冲,按道理FLTR2引脚接地,不会有输出,请问是什么原因?