hy_barry:
测试要先将输出地floating,再测试.这种做法是正确的...以下引自EN60950-1-2006clause2.4.22.4.2LimitvaluesForfrequenciesnotexceeding1kHz,thesteady-statecurrentdrawnthroughanon-inductiveresistorof2000Ω±10%connectedbetweenanytwopartsofaLIMITEDCURRENTCIRCUIT,orbetweenanysuchpartandearth(see1.4.9),shallnotexceed0,7mApeak,or2mAd.c.如果不将输出地floating,那么输出会旁路一部分电流,使测得的电流值偏小...