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TPS92518 引脚1 2 3处烧坏严重

Other Parts Discussed in Thread: TPS92518

TI工程师,你好:

我先在碰到一个问题,在使用TPS92518的时候,有几块电路板的前三个引脚烧坏严重,有的板子没有这个问题,能帮忙分析一下么。应用工程师说  是在上点过一会出现,还没开始点亮LED