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关于TPS23754 5V/5A 原理图疑问。

Other Parts Discussed in Thread: TPS23754

参考官方TPS23754 原理图,但是在调试的时候,遇到一个问题,电路中C28/0.47uF,并没有焊接,但是输出电压任然能正常输出5V。

所以,Q1/SiR464DP,在C28没有上件状态时是处于什么状态?为什么电路仍能正常输出5V?