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BQ257000A可以用5V充电,但是不能用PD充电器充电

Other Parts Discussed in Thread: BQ25700A

BQ25700A在5V的时候充电有1.5A,这个充电电流可以持续到7.5V;之后继续调高充电电压电流就会慢慢减小,到9V时候就停止充电了;用18W PD充电器充电,充电器可以输出12V电压,但是芯片没有工作,读取芯片处于SYSOVP保护,并关闭了转换器;请问这个什么原因导致SYSOVP保护,下面是原理图外围配置有问题吗?我们用的是2节锂离子电池

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