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1、APPLICAApplicationNote105TIONNOTE—105December2005CurrentSenseCircuitCollectionMakingSenseofCurrentTimRegan,EditorINTRODUCTIONSensingand/orcontrollingcurrentflowisafundamentalThisApplicationNoteWillChangerequirementinmanyelectronicssystems,andthetech-ThisApplicationNoteisagrowingandc
2、hangingdocu-niquestodosoareasdiverseastheapplicationsthem-ment.Manyofthechapterslistedbelowareplaceholdersselves.ThisApplicationNotecompilessolutionstocur-formaterialthatwillbefilledinsoon.Asthechaptersarerentsensingproblemsandorganizesthesolutionsbyadded,theirlinkswillbeenabled.gen
3、eralapplicationtype.ThesecircuitshavebeenculledfromavarietyofLinearTechnologydocuments.UsingtheApplicationNoteClickthenameofachapterinthe“CircuitCollectionIn-CircuitsOrganizedbyGeneralApplicationdex”belowtoopenthePDFversionofthatchapter.Eachchaptercollectstogetherapplicationsthatten
4、dtosolveasimilargeneralproblem,suchashighsidecur-Contributorsrentsensing,ornegativesupplysensing.ThechaptersJonMunson,AlexiSevastopoulos,aretitledaccordingly(see“CircuitCollectionIndex”be-GregZimmer,MichaelStokowskilow).Inthisway,thereaderhasaccesstomanypossiblesolutionstoaparticula
5、rprobleminoneplace.,LTC,LTM,LT,BurstMode,OPTI-LOOP,Over-The-TopandPolyPhaseareregisteredtrademarksofLinearTechnologyCorporation.AdaptivePower,C-Load,DirectSense,EasyDrive,FilterCAD,HotSwap,LinearView,µModule,MicropowerSwitcherCAD,MultimodeItisunlikelythatanyparticularcircuitshownwil
6、lexactlyDimming,NoLatency∆Σ,NoLatencyDelta-Sigma,NoRSENSE,OperationalFilter,PanelPro-tect,PowerPath,PowerSOT,SmartStart,SoftSpan,StageShedding,SwitcherCAD,ThinSOT,meettherequirementsforaspecificdesign,butthesug-UltraFastandVLDOaretrademarksofLinearTechnologyCorporation.Otherproductn
7、amesgestionofmanycircuittechniquesanddevicesshouldmaybetrademarksofthecompaniesthatmanufacturetheproducts.proveuseful.Specificcircuitsmayappearinseveralchaptersiftheyhavebroadapplication.CIRCUITCOLLECTIONINDEXQCurrentSenseBasicsQLevelShiftingQHighSpeedQHighSideQHighVoltageQFaultSens
8、ingQLowSideQLowVolt
