参考TPS65130数据手册设计的电路通电后发现正电源输出正常,负压输出为0,其中FBN引脚为0,VREF为1.2V,4号脚电压正常
原理图如下
PCB布局如下:
希望各位大佬帮忙看下问题所在。补充芯片无发热,输入电流正常
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Hi
电路看起来没有问题,有没有阻抗上确认负压电路这边是否有短路之类,或者连接错误之类?
另外更换一个芯片看看?