外文翻译---topswitch系列三端离线式pwm开关

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1、附录附录A英文原文TOPSwitchFamilyThree-terminalOff-linePWMSwitchTOPSwitchdevicebelongstothree-linePWMswitch.ItisanewtypeofICwhichmergesPWMandMOSFET.Ithasmanyadvantages:smallvolume,lightweight,highdensityandlowcost.Highfrequencyswitchingpowersupplymadefromitcannotonlysimplifythecircuit,butalsoc

2、animprovetheEMCcharacteristicsandreducethecost.TheTOPSwitchfamilyimplements,withonlythreepins,allfunctionsnecessaryforanoff-lineswitchedmodecontrolsystem:highvoltageN-channelpowerMOSFETwithcontrolledturn-ongatedriver,voltagemodePWMcontrollerwithintegrated100kHzoscillator,highvoltagest

3、art-upbiascircuit,bandgapderivedreference,biasshuntregulator/erroramplifierforloopcompensationandfaultprotectioncircuitry.ComparedtodiscreteMOSFETandcontrollerorselfoscillating(RCC)switchingconvertersolutions,aTOPSwitchintegratedcircuitcanreducetotalcost,componentcount,size,weightanda

4、tthesametimeincreaseefficiencyandsystemreliability.Thesedevicesareintendedfor100/110/230VACoff-linePowerSupplyapplicationsinthe0to100W(0to50Wuniversal)rangeand230/277VACoff-linepowerfactorcorrection(PFC)applicationsinthe0to150Wrange.PinFunctionalDescriptionDRAINPin:OutputMOSFETdrainco

5、nnection.Providesinternalbiascurrentduringstart-upoperationviaaninternalswitchedhighvoltagecurrentsource.Internalcurrentsensepoint.CONTROLPin:Erroramplifierandfeedbackcurrentinputpinfordutycyclecontrol.Internalshuntregulatorconnectiontoprovideinternalbiascurrentduringnormaloperation.T

6、riggerinputforlatchingshutdown.Itisalsousedasthesupplybypassandauto-restart/compensationcapacitorconnectionpoint.SOURCEPin:OutputMOSFETsourceconnection.Primary-sidecircuitcommon,powerreturn,andreferencepoint.TOPSwitchFamilyFunctionalDescriptionTOPSwitchisaselfbiasedandprotectedlinearc

7、ontrolcurrent-to-dutycycleconverterwithanopendrainoutput.HighefficiencyisachievedthroughtheuseofCMOSandintegrationofthemaximumnumberoffunctionspossible.CMOSsignificantlyreducesbiascurrentsascomparedtobipolarordiscretesolutions.Integrationeliminatesexternalpowerresistorsusedforcurrents

8、ensin