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TPS65131无法输出负电源



原理图按照datasheet画的,接通5V电源后,发现有+10.8V电压,VNEG电源异常,为+0.2V左右(接20K左右的电阻到GND作为负载),请问这是那里的问题?

下面原理图R49、R56阻值反了,时间验证是有对调过来的。