BTS 7750 G中文资料

P-DSO-28-14DataSheet12001-02-01TrilithICDataSheetBTS7750G1Overview1.1FeaturesQuadD-MOSswitchdriverFreeconfigurableasbridgeorquad-switchOptimizedforDCmotormanagementapplicationsLowRDSON:70mτhigh-sideswitch,45mτlow-sideswitch(typicalvalues@25C)Maximumpeakcurrent:typ.12A@25C=Verylowquiescentcurrent:typ.5←A@25C=Smalloutline,enhancedpowerP-DSO-packageFullshort-circuit-protectionOperatesupto40VStatusflagdiagnosisOvertemperatureshutdownwithhysteresisInternalclampdiodesIsolatedsourcesforexternalcurrentsensingUnder-voltagedetectionwithhysteresisPWMfrequenciesupto1kHz1.2DescriptionTheBTS7750GispartoftheTrilithICfamilycontainingthreediesinonepackage:Onedoublehigh-sideswitchandtwolow-sideswitches.ThedrainsofthesethreeverticalDMOSchipsaremountedonseparatedleadframes.Thesourcesareconnectedtoindividualpins,sotheBTS7750GcanbeusedinH-bridge-aswellasinanyotherconfiguration.Boththedoublehigh-sideandthetwolow-sideswitchesoftheBTS7750GaremanufacturedinSMARTSIPMOS®technologywhichcombineslowRDSONverticalDMOSpowerstageswithCMOScontrolcircuitry.Thehigh-sideswitchisfullyprotectedandcontainsthecontrolanddiagnosiscircuitry.Alsothelow-sideswitchesarefullyprotected,theequivalentstandardproductistheBSP78.IncontrasttotheBTS7750GP,whichconsistsofthesamechipsinanP-TO263-15package,theP-DSO-28-14packageoffersasmalleroutlineandalowerpriceforapplications,whichdonotneedthethermalpropertiesoftheP-TO263-15.TypeOrderingCodePackageBTS7750GQ67007-A9401P-DSO-28-14BTS7750GDataSheet22001-02-011.3PinConfiguration(topview)Figure128DL125DL127SL126SL124DHVS23SH122SH121SH220SH219DHVS18DL215DL216SL217SL21DL15DHVS4N.C.3DL12IL16GND7IH18ST9IH210DHVS11DL214N.C.13DL212IL2HS-LeadframeLS-LeadframeLS-LeadframeBTS7750GDataSheet32001-02-01Pinswritteninboldtypeneedpowerwiring.1.4PinDefinitionsandFunctionsPinNo.SymbolFunction1,3,25,28DL1Drainoflow-sideswitch1,leadframe11)2IL1Analoginputoflow-sideswitch14N.C.notconnected5,10,19,24DHVSDrainofhigh-sideswitchesandpowersupplyvoltage,leadframe21)6GNDGround7IH1Digitalinputofhigh-sideswitch18STStatusofhigh-sideswitches;openDrainoutput9IH2Digitalinputofhigh-sideswitch211N.C.notconnected12,14,15,18DL2Drainoflow-sideswitch2,leadframe31)13IL2Analoginputoflow-sideswitch216,17SL2Sourceoflow-sideswitch220,21SH2Sourceofhigh-sideswitch222,23SH1Sourceofhigh-sideswitch126,27SL1Sourceoflow-sideswitch11)Toreducethethermalresistancethesepinsaredirectconnectedviametalbridgestotheleadframe.BTS7750GDataSheet42001-02-011.5FunctionalBlockDiagramFigure2BlockDiagramSH2DHVSSTIL1GNDIH1SL2IH2IL2SL1DL2SH1DL15,10,19,249720,2116,176132RO1RO2BiasingandProtectionDiagnosisDriverOUT0IN0LL01LH10HL11HH22,231,3,25,28826,2712,14,15,18ProtectionGateDriverProtectionGateDriverBTS7750GDataSheet52001-02-011.6CircuitDescriptionInputCircuitThecontrolinputsIH1,2consistofTTL/CMOScompatibleSchmitt-Triggerswithhysteresis.Bufferamplifiersaredrivenbythesestagesandconvertthelogicsignalintothenecessaryformfordrivingthepoweroutputstages.TheinputsareprotectedbyESDclamp-diodes.TheinputsIL1andIL2areconnectedtotheinternalgate-drivingunitsoftheN-channelverticalpower-MOS-FETs.OutputStagesTheoutputstagesconsistofanlowRDSONPower-MOSH-bridge.InH-bridgeconfiguration,theD-MOSbodydiodescanbeusedforfreewheelingwhencommutatinginductiveloads.Ifthehigh-sideswitchesareusedassingleswitches,positiveandnegativevoltagespikeswhichoccurwhendrivinginductiveloadsarelimitedbyintegratedpowerclampdiodes.ShortCircuitProtectionTheoutputsareprotectedagainst–outputshortcircuittoground–outputshortcircuittothesupplyvoltage,and–overload(loadshortcircuit).AninternalOP-AmpcontrolstheDrain-Source-VoltagebycomparingtheDS-Voltage-Dropwithaninternalreferencevoltage.AbovethistrippointtheOP-Ampreducestheoutputcurrentdependingonthejunctiontemperatureandthedropvoltage.Inthecaseofoverloadedhigh-sideswitchesthestatusoutputissettolow.Thefullyprotectedlow-sideswitcheshavenostatusoutput.OvertemperatureProtectionThehigh-sideandthelow-sideswitchesalsoincorporateanovertemperatureprotectioncircuitwithhysteresiswhichswitchesofftheoutputtransistors.Inthecaseofthehigh-sideswitches,thestatusoutputissettolow.Undervoltage-Lockout(UVLO)WhenVSreachestheswitch-onvoltageVUVONtheICbecomesactivewithahysteresis.TheHigh-SideoutputtransistorsareswitchedoffifthesupplyvoltageVSdropsbelowtheswitchoffvalueVUVOFF.BTS7750GDataSheet62001-02-01StatusFlagThestatusflagoutputisanopendrainoutputwithZener-diodewhichrequiresapull-upresistor,c.f.theapplicationcircuitonpage14.Variouserrorsaslistedinthetable“Diagnosis”aredetectedbyswitchingtheopendrainoutputSTtolow.Aopenloaddetectionisnotavailable.Freewheelingconditiondoesnotcauseanerror.2TruthtableandDiagnosis(validonlyfortheHigh-Side-Switches)FlagIH1IH2SH1SH2STRemarksInputsOutputsNormaloperation;identicalwithfunctionaltruthtable00110101LLHHLHLH1111stand-bymodeswitch2activeswitch1activebothswitchesactiveOvertemperaturehigh-sideswitch101XXLLXX10detectedOvertemperaturehigh-sideswitch2XX01XXLL10detectedOvertemperaturebothhigh-sideswitches0X101XLLLLLL100detecteddetectedUndervoltageXXLL1notdetectedI