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tps65130没有正电压输出

输入3.7V,输出正负7V

上电后负电压输出正常,为-7.2V左右,FBN为-6.9V;但是正电压输出为0,FBP也为0;

电路和layout都是参考评估板做的,如图

请问问题出在哪里,或者怎么测试?