TPS61080中文资料

ΩR249.9kW4.7µFTPS61081L1:TDKVLCF5020T-4R7N1R7-1C3:FeedforwardcapacitorforstabilityC1:MurataGRM188R60J105KR3:NoisedecouplingresistorC2:MurataGRM219R61C475KCs:SoftstartprogrammingcapacitorLVINENFSWSSGNDSWOUTFBPGNDTPS61080TPS61081SLVS644B–FEBRUARY2006–REVISEDJANUARY2007HIGHVOLTAGEDC/DCBOOSTCONVERTERWITH0.5-A/1.3-AINTEGRATEDSWITCH•2.5-Vto6-VInputVoltageRangeTheTPS61080/1isa1.2MHz/600kHzfixedfrequencyboostregulatordesignedforhigh•Upto27-VOutputVoltageintegration,whichintegratesapowerswitch,an•0.5-AIntegratedSwitch(TPS61080)input/outputisolationswitchandapowerdiode.1.3-AIntegratedSwitch(TPS61081)Whenashortcircuitconditionisdetected,the•12V/400mAand24V/170mAFrom5-VInputisolationswitchopensuptodisconnecttheoutput(TYP)fromtheinput.Asaresult,theICprotectsitselfandtheinputsourcefromanypin,exceptVIN,from•IntegratedPowerDiodebeingshortedtoground.Theisolationswitchalso•1.2-MHz/600-kHzSelectableFixedSwitchingdisconnectstheoutputfrominputduringshutdowntoFrequencypreventanyleakagecurrent.Otherprovisionsfor•InputtoOutputIsolationprotectioninclude0.5A/1.3Apeak-to-peakovercurrentprotection,programmablesoftstart(SS),•Short-CircuitProtectionovervoltageprotection(OVP),thermalshutdownand•ProgrammableSoftStartundervoltagelockout(UVLO).•OvervoltageProtectionTheICoperatesfrominputsuppliesincludingsingle•Upto87%EfficiencyLi-ionbattery,tripleNiMH,andregulated5V,suchas•10-Pin3mm×3mmQFNPackageUSBoutput.Theoutputcanbeboostedupto27V.TPS61080/1canprovidethesupplyvoltagesofOLED,TFT-LCDbias,12Vand24Vpowerrails.TheoutputofTPS61080/1canalsobeconfiguredasa•3.3Vto12V,5Vto12Vand24VBoostcurrentsourcetopowerupto7WLEDinflashlightConverterapplications.•WhiteLEDBacklightforMediaFormFactorDisplayORDERINGINFORMATION•OLEDPowerSupplyTAOVERCURRENTPACKAGEPACKAGE•xDSLApplicationsLIMITMARKING•TFT-LCDBiasSupply0.5A(min)TPS61080DRCRBCN•WhiteLEDFlashLight1.3A(min)TPS61081DRCRBCO–40°Cto85°C0.5A(min)TPS61080DRCTBCN1.3A(min)TPS61081DRCTBCOFigure1.5Vto12V,250mAStep-UpDC/DCConverterPleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.PowerPADisatrademarkofTexasInstruments.PRODUCTIONDATAinformationiscurrentasofpublicationdate.Copyright©2006–2007,TexasInstrumentsIncorporatedProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.–FEBRUARY2006–REVISEDJANUARY2007TERMINALFUNCTIONSTERMINALI/ODESCRIPTIONNAMENO.TheinductorisconnectedbetweenthispinandtheSWpin.ThispinconnectstothesourceoftheL1IisolationFETaswell.MinimizetraceareaatthispintoreduceEMI.InputpintotheIC.Itistheinputtotheboostregulator,andalsopowerstheICcircuit.ItisconnectedtoVIN2IthedrainoftheisolationFETaswell.Enablepin.Whenthevoltageofthispinfallsbelowenablethresholdformorethan74ms,theICturnsoffEN6Iandconsumeslessthan2μAcurrent.GND4SignalgroundoftheICPowergroundoftheIC.ItisconnectedtothesourceofthePWMswitch.ThispinshouldbemadeveryPGND8closetotheoutputcapacitorinlayout.Voltagefeedbackpinfortheoutputregulation.Itisregulatedtoaninternalreferencevoltage.AnexternalFB5IvoltagedividerfromtheoutputtoGNDwiththecentertapconnectedtothispinprogramstheregulatedvoltage.Thispincanalsobeconnectedtoalowsidecurrentsenseresistortoprogramcurrentregulation.Outputoftheboostregulator.Whentheoutputvoltageexceedsthe27Vovervoltageprotection(OVP)OUT9Othreshold,thePWMswitchturnsoffuntilVoutdrops0.7Vbelowtheovervoltagethreshold.SW10ISwitchingnodeoftheIC.ConnecttheinductorbetweenthispinandtheLpin.SS3ISoftstartprogrammingpin.AcapacitorbetweentheSSpinandGNDpinprogramssoftstarttiming.Switchingfrequencyselectionpin.Logichighonthepinselects1.2MHz,whilelogiclowreducestheFSW7Ifrequencyto600KHzforbetterlightloadefficiency.Thethermalpadshouldbesolderedtotheanalogground.Ifpossible,usethermalviatoconnecttoThermalPad–groundplaneforidealpowerdissipation.FUNCTIONALBLOCKDIAGRAM2SubmitDocumentationFeedback–FEBRUARY2006–REVISEDJANUARY2007overoperatingfree-airtemperaturerange(unlessotherwisenoted)(1)VALUEUNITSupplyVoltagesonpinVIN(2)–0.3to7VVoltagesonpinsEN,FB,SS,LandFSW(2)–0.3to7VVoltageonpinOUT(2)30VVVoltageonpinSW(2)30VVContinuousPowerDissipationSeeDissipationRatingTableOperatingJunctionTemperatureRange–40to150°CStorageTemperatureRange–65to150°CLeadTemperature(soldering,10sec)260°C(1)Stressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedevice.Thesearestressratingsonly,andfuncti