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Original question:

TPS61040

TPS61040: TPS61040输出负压电压偏低

x w
Prodigy 10 points
Part Number: TPS61040


电路如图，R15：110K ；R18：10K ；预估R16处是14.6V，C20处14V；实测R16处14.8V，C20处电压异常，是13.2V；这个是什么原因？SW处实测频率约50KHz；麻烦帮忙分析一下

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