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1、APPLICAApplicationNote105TIONNOTE—105December2005CurrentSenseCircuitCollectionMakingSenseofCurrentTimRegan,EditorINTRODUCTIONSensingand/orcontrollingcurrentflowisafundamentalThisApplicationNoteWillChangerequirementinmanyelectronicssystems,andthetech-ThisApplicationNotei
2、sagrowingandchangingdocu-niquestodosoareasdiverseastheapplicationsthem-ment.Manyofthechapterslistedbelowareplaceholdersselves.ThisApplicationNotecompilessolutionstocur-formaterialthatwillbefilledinsoon.Asthechaptersarerentsensingproblemsandorganizesthesolutionsbyadded,t
3、heirlinkswillbeenabled.generalapplicationtype.ThesecircuitshavebeenculledfromavarietyofLinearTechnologydocuments.UsingtheApplicationNoteClickthenameofachapterinthe“CircuitCollectionIn-CircuitsOrganizedbyGeneralApplicationdex”belowtoopenthePDFversionofthatchapter.Eachcha
4、ptercollectstogetherapplicationsthattendtosolveasimilargeneralproblem,suchashighsidecur-Contributorsrentsensing,ornegativesupplysensing.ThechaptersJonMunson,AlexiSevastopoulos,aretitledaccordingly(see“CircuitCollectionIndex”be-GregZimmer,MichaelStokowskilow).Inthisway,t
5、hereaderhasaccesstomanypossiblesolutionstoaparticularprobleminoneplace.,LTC,LTM,LT,BurstMode,OPTI-LOOP,Over-The-TopandPolyPhaseareregisteredtrademarksofLinearTechnologyCorporation.AdaptivePower,C-Load,DirectSense,EasyDrive,FilterCAD,HotSwap,LinearView,µModule,Micropower
6、SwitcherCAD,MultimodeItisunlikelythatanyparticularcircuitshownwillexactlyDimming,NoLatency∆Σ,NoLatencyDelta-Sigma,NoRSENSE,OperationalFilter,PanelPro-tect,PowerPath,PowerSOT,SmartStart,SoftSpan,StageShedding,SwitcherCAD,ThinSOT,meettherequirementsforaspecificdesign,butt
7、hesug-UltraFastandVLDOaretrademarksofLinearTechnologyCorporation.Otherproductnamesgestionofmanycircuittechniquesanddevicesshouldmaybetrademarksofthecompaniesthatmanufacturetheproducts.proveuseful.Specificcircuitsmayappearinseveralchaptersiftheyhavebroadapplication.CIRCU
8、ITCOLLECTIONINDEXQCurrentSenseBasicsQLevelShiftingQHighSpeedQHighSideQHighVoltageQFaultSensingQLowSideQLowVolt