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1、APPLICAApplicationNote105TIONNOTE—105December2005CurrentSenseCircuitCollectionMakingSenseofCurrentTimRegan,EditorINTRODUCTIONSensingand/orcontrollingcurrentflowisafundamentalThisApplicationNoteWillChangerequirementinmanyelectronicssystems,andthetech-ThisApplicationNoteisagrowingandchangingdo
2、cu-niquestodosoareasdiverseastheapplicationsthem-ment.Manyofthechapterslistedbelowareplaceholdersselves.ThisApplicationNotecompilessolutionstocur-formaterialthatwillbefilledinsoon.Asthechaptersarerentsensingproblemsandorganizesthesolutionsbyadded,theirlinkswillbeenabled.generalapplicationtyp
3、e.ThesecircuitshavebeenculledfromavarietyofLinearTechnologydocuments.UsingtheApplicationNoteClickthenameofachapterinthe“CircuitCollectionIn-CircuitsOrganizedbyGeneralApplicationdex”belowtoopenthePDFversionofthatchapter.Eachchaptercollectstogetherapplicationsthattendtosolveasimilargeneralprob
4、lem,suchashighsidecur-Contributorsrentsensing,ornegativesupplysensing.ThechaptersJonMunson,AlexiSevastopoulos,aretitledaccordingly(see“CircuitCollectionIndex”be-GregZimmer,MichaelStokowskilow).Inthisway,thereaderhasaccesstomanypossiblesolutionstoaparticularprobleminoneplace.,LTC,LTM,LT,Burst
5、Mode,OPTI-LOOP,Over-The-TopandPolyPhaseareregisteredtrademarksofLinearTechnologyCorporation.AdaptivePower,C-Load,DirectSense,EasyDrive,FilterCAD,HotSwap,LinearView,µModule,MicropowerSwitcherCAD,MultimodeItisunlikelythatanyparticularcircuitshownwillexactlyDimming,NoLatency∆Σ,NoLatencyDelta-Si
6、gma,NoRSENSE,OperationalFilter,PanelPro-tect,PowerPath,PowerSOT,SmartStart,SoftSpan,StageShedding,SwitcherCAD,ThinSOT,meettherequirementsforaspecificdesign,butthesug-UltraFastandVLDOaretrademarksofLinearTechnologyCorporation.Otherproductnamesgestionofmanycircuittechniquesanddevicesshouldmayb
7、etrademarksofthecompaniesthatmanufacturetheproducts.proveuseful.Specificcircuitsmayappearinseveralchaptersiftheyhavebroadapplication.CIRCUITCOLLECTIONINDEXQCurrentSenseBasicsQLevelShiftingQHighSpeedQHighSideQHighVoltageQFaultSensingQLowSideQLowVolt
