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TPS650250问题

Other Parts Discussed in Thread: TPS650250

参照官网开发板设计的板子,现在电源模块出现以下问题(DSP型号是TMSC6748,电源芯片是TPS650250):

1:电源模块是按照官网开发板的设计的,现在问题是1.3V输出也就是VDCDC3一直是1.58V不管分压电阻换多大;

2:另外1.8V实际输出是1.96V,这个1.96正常吗。

请问,以上问题可能是什么原因。