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从block看,测电压是指VBUS和GND之间的电压,那么只测电压的话,Rshunt应该可以直接删掉,然后VBUS接到12V supply,这样block的双刀双置开关打到上面时可以测到12V supply的电压了。但是TI的FAE跟我讲,Vin+和Vin-之间不能开路。有些不明白。