请教一下 我找ti模拟搭建出来的电路,当我在不接FB脚或接地时能为16v左右,接地为0v,但是一旦接入分压电阻,输出只为3.1v左右,fb电压为零点几符,显然没有正常工作,并且调整分压电阻没有用的,请问这是怎么回事。 刚刚上电测试了一下,发现8脚一下子接地了,芯片坏了,和六脚通了起来,请问原因在哪呢??
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