标签: 故障查找

继电保护用开关电源的故障查找及改进对策

Foranyapplicationtobeginproperoperation,theappli-cationmustpower-upproperly.Manycriteriamustbetakenintoaccounttoensurethis.ThePICmicro™devicesintegrateseveralfeaturestosimplifythedesignforthepower-upsequence.Theseintegratedfeaturesalsoreducethetotalsystemcost.Thisapplicationnotedescribestherequirementsforthedevicetoproperlypower-up,commonpitfallsthatdesignersencounter,andmethodstoassistinsolvingpower-upproblems.AN607Power-upTroubleShootingcapableofgeneratinganinternalresetsignal.Author:MarkPalmerDependingonthedevicefamily,differentpower-upMicrochipTechnologyInc.sequenceswilloccurafterthisPORsignal.Contributions:RichardHull&RandyYachIftheslopeislessthen0.05V/ms,theMCLRpinshouldMicrochipTechnologyInc.beheldlow,byexternalcircuitry,untilavalidoper……