hy_barry：
測試要先將輸出地floating,再測試.這種做法是正確的...以下引自EN60950-1-2006clause2.4.22.4.2LimitvaluesForfrequenciesnotexceeding1kHz,thesteady-statecurrentdrawnthroughanon-inductiveresistorof2000Ω±10%connectedbetweenanytwopartsofaLIMITEDCURRENTCIRCUIT,orbetweenanysuchpartandearth(see1.4.9),shallnotexceed0,7mApeak,or2mAd.c.如果不將輸出地floating,那么輸出會(huì)旁路一部分電流,使測得的電流值偏小...