tps2511usb专用充电端口控制器和电流限制电源开关

查询样品特 说支持一个将D+线路短接至D-线路的USB充 TPS2511是一款USB充电端口(DCP)控制器和电端口 电流限制电源开关。一个自动检测特性USB数支持一个在D+线应用2.0V电压，在D-线路 上应用2.7V电压的USBDCP（或者是一个在D+ 应用2.7V电压，在D- 应用2.0VUSB

应2.7V2.0VDD线应用2.0V和2.7V电压 D+和D-线的电压均为 %

) USB2.03.0工作电压范围：4.5VUSB(AC(DC墙式适配

5.05.05.05.01OUTAC-to-DCConverterBuckDC-to-DC2ILIM73DP4ENPowerUSBPleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsCopyright©2012,TexasInstrumentsTexasInstrumentssemiconductorproductsanddierstheretoappearsattheCopyright©2012,TexasInstrumentsPRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperthetermsoftheInstrumentsstandardwarranty.Productionprocessingdoes EnglishDataSheet:necessarilyincludetestingofallThisintegratedcircuitcanbedamagedbyESD.TexasInstruments mendsthatallintegratedcircuitsbehandledwithappropriateprecautions.Failuretoobserveproperhandlingandinstallationprocedurescancausedamage.ESDdamagecanrangefromsubtleperformancedegradationtocompletedevicefailure.Precisionintegratedcircuitsmaybemoresusceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications.ORDERING–40°CtoMSOP8Tapeand(1)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthis,orseetheTIwebsiteat UM mendedjunctiontemperaturerange,voltagesarereferencedtoGND(unlessotherwiseSupplyvoltage7VInputvoltageEN,7VoltageOUT,7INto7DPoutputvoltage,DMoutputIN+0.3orDPinputvoltage,DMinputIN+0.3orContinuousoutputsinkDPinputcurrent,DMinputDPoutputcurrent,DMoutputContinuousoutputsinkInternallyESDHumanBodyModelIN,OUT,EN,ILIM_SET,2DP,ChargingDeviceModelVOperatingjunctiontemperature,InternallyStoragetemperaturerange,THERMALTHERMALDGN(8Junction-to-ambientthermalJunction-to-case(top)thermalJunction-to-boardthermalJunction-to-topcharacterizationJunction-to-boardcharacterizationJunction-to-case(bottom)thermal有关传统和全新热度量的信息，请参阅IC封装热度量应用报告（文献号：SPRA953）MENDEDOPERATINGvoltagesarereferencedtoGND(unlessotherwisenoted),positivecurrentareintoInputvoltageofVInputvoltageof0Inputvoltageof0DPdatalineinput0DMdatalineinput0Continuoussink/sourceContinuoussink/sourceContinuoussink2ContinuousoutputcurrentofARLAresistorofcurrent-limit,ILIM_SETtoOperatingjunctionºELECTRICALConditionsare–40°C≤(TJ=TA)≤125°C,4.5V≤VIN≤5.5V,VEN=VNandRLM_SET=22.1kΩ.Positivecurrentareintopins.Typicalvaluesareat25°C.AllvoltagesarewithrespecttoGND(unlessotherwisenoted).TESTPOWERIOUT=2IOUT=2A,–40ºC≤(TJ=TA)≤IOUT=2A,TJ=TA=OUTvoltageriseCL=1µF,RL=100Ω,VIN=5VFigure1,FigureOUTvoltagefallCL=1µF,RL=100Ω,VIN=5VFigure1,FigureReverseleakageVOUT=5.5V,VIN=VEN=0 DischargeVOUT=4ΩCURRENTOUTshort-circuitcurrentRLM_SET=44.2RLM_SET=22.1RLM_SET=16.9Short-circuitresponseVIN=5.0V,RL=50mΩ,2inchesleadlength,SeeFigure4HICCUPOUTvoltagethresholdofgoingintohiccupmodeVIN=5.0V,RILIM_SET=210VOntimeofhiccupVIN=5.0V,RL=OfftimeofhiccupVIN=5.0V,RL=sINUVLOthresholdvoltage,VSUPPLYDisabled,INsupplyVEN=0V,VN=5.5–40ºC≤TJ≤ Enabled,INsupplyVEN=VIN,RLM_SET=210Specifiedbydesign.NotproductionELECTRICALCHARACTERISTICS(Conditionsare–40°C≤(TJ=TA)≤125°C,4.5V≤VIN≤5.5V,VEN=VNandRLM_SET=22.1kΩ.Positivecurrentareintopins.Typicalvaluesareat25°C.AllvoltagesarewithrespecttoGND(unlessotherwisenoted).TESTTHERMALTemperaturerisingNotincurrentIncurrentHysteresisOUTCURRENTrising(2)RLM_SET=22.1RLM_SET=44.2RLM_SET=22.1RLM_SET=44.2CSoutputactivelowICS=10CSdeglitchtimeduringturningICS=18ENABLEINPUT ENthresholdvoltage,VLeakageVEN=0VorVEN=5.5OUTvoltageturn-onCL=1µF,RL=100Ω,seeFigure1,Figure2 OUTvoltageturn-off BC1.2DCPMODE(SHORT DPandDMshortingVDP=0.8V,IDM=1ΩVDP=0.8VoltagethresholdonDPunderwhichthedevicegoesbacktodividermode50DIVIDER DPoutputVIN=5.0VDMoutputVIN=5.0DPoutputIDP=–5DMoutputIDM=–51.2V/1.2V DPoutputVIN=5.0VDMoutputVIN=5.0VDPoutputIDP=–5DMoutputIDM=–5Specifiedbydesign.Notproduction Figure1.OutputRiseandFallTest Figure2.EnableTiming,ActiveHigh

Figure3.Power-Onand Figure4.OutputShort-CircuitFUNCTIONALBLOCK DEVICE8PINS(Top ILIM

PIN4OActivelowopen-drainoutput,whenOUTcurrentismorethanapproximayhalfofthecurrentlimitsetbyaresistoronILIM_SETpin,theoutputisactivelow.umsinkcurrentis10mA.7ConnectedtotheD–orD+lineofUSBconnector,providethecorrectvoltagewithanattachedportableequipmentforDCPdetection,highimpedancewhiledisabled.6ConnectedtotheD+orD–lineofUSBconnector,providethecorrectvoltagewithanattachedportableequipmentforDCPdetection,highimpedancewhiledisabled.5ILogic-levelcontrolinput,whenitishigh,turnspowerswitchon,whenitislow,turnspowerswitchoffandturnsDPandDMintothehighimpedancestate.1GGround2IExternalresistorusedtosetcurrent-limiting mended16.9kΩ≤RILIM_SET≤7503PPowersupply.Inputvoltageconnectedtopowerswitch,connectaceramiccapacitorwithavalueof0.1-µForgreaterfromtheINpintoGNDasclosetothedeviceaspossible.8OPower-switchoutput.ConnecttoVBUSofGGround(1)G=Ground,I=Input,O=Output,P=0.10.1100 100385746

USBUSB2ILIM

GND

RILIMFigure5.TestCircuitforSystemOperationinTypicalCharacteristicsTYPICALVIN=5V,VIN=5V,COUT=22F,RILIMSET=22.1k,RL=2.5 6 OUT,EN,OUT,EN,CS-OUT,EN,CS-IOUT-IOUT-2 0

IOUTIOUT-0 Time-

0Time-

Figure6.TurnonDelayandRiseTimeWith22-µF Figure7.TurnoffDelayandFallTimeWith22-µFVINVIN=5V,COUT=22F,RILIMSET=22.1k,RL=2.5 OUT,OUT,EN,DP,DM-20 Time-

OUT,OUT,EN,DP,DM-20 Time-Figure8.Enableinto2.5-Ω Figure9.Disablewith2.5-ΩVIN=5V,VIN=5V,COUT=22F,RILIMSET=22.1k,RL=2.5 OUT VIN=5V,COUT=22F,RILIMSET=22.1k,RL=2.5 6 4VIN,OUTVIN,OUT-IOUT-VIN,OUT-2 0

IOUTIOUT-

0-6m-4m- -4m- -8m-10m-12m-Time-

Time-Figure10.PowerUp– Figure11.PowerDown–TYPICALCHARACTERISTICS(8VIN=5V,RILIMSET=22.1k,RL=2.564OUT,OUT,EN-0

0

VIN=5V,COUT=22F,RILIMSET=22.1k,RL=1.836OUT,OUT,EN,CS-IOUTIOUT-0

4IOUTIOUT-

22222

8821542

-6m-4m- 8m10m12mTime-

Time-

Figure12.InrushCurrentwithDifferentCapacitance Figure13.Enableinto1.83-VIN=5V,VIN=5V,COUT=22F,RILIMSET=22.1k,RL=0 6 OUT,EN,CS-OUT,EN,CS-EN,DP,DM-IOUT-IOUT-2

IOUTIOUT- 0

-15m- 20m Time-Figure14.Enableinto1-ΩVIN=5V,COUT=22F,RILIMSET=22.1k,RL=166330

-10m- 10mFigure15.EnableintoFigure15.EnableintoVIN=5V,COUT=22F,RILIMSET=22.1k,RL=138261402

20m25m30m35mVIN,OUT,CS-IOUTVIN,OUT,CS-IOUT-OUT,EN-IOUT-

Time-

Time-

Figure16.1-ΩLoad Figure17.HiccupModeWhileEnabledinto1-ΩTYPICALCHARACTERISTICS( VIN=5DPandDMDPandDMOutputVoltage-CS-IOUTCS-IOUT- Time-

TJ-JunctionTemperature-Figure18.OutputCurrentSensing Figure19.DPandDMOutputVoltagevsVINVIN=5V,RILIMSET=16.9SupplySupplyCurrent,Disabled-0 TJ-JunctionTemperature-

VINVIN=5 RILIM=16.9RILIM=210SupplyCurrent,Enabled- TJ-JunctionTemperature-Figure20.SupplyCurrentDisabledvs Figure21.SupplyCurrentEnabledvsVIN=VIN=5V,IOUT=2ICCICC-CurrentLimit-RDS(ON)-2 TJ-JunctionTemperature-

TJ-JunctionTemperature-Figure22.CurrentLimitvs Figure23.PowerSwitchOn-(RDS(ON))DETAILEDThefollowingoverviewreferencesvariousindustrystandards.Itisalways mendedtoconsultthelateststandardtoensurethemostrecentandaccurateinformation.Rechargeableportableequipmentrequiresanexternalpowersourcetochargeitsbatteries.USBportsareconvenientlocationsforchargingbecauseofanavailable5-Vpowersource.Universallyacceptedstandardsarerequiredtoensurehostand-sidedevicesmeetthepowermanagementrequirements.Traditionally,USBhostportsfollowingtheUSB2.0Specificationmustprovideatleast500mAtodownstream-sidedevices.BecausemultipleUSBdevicescanbeattachedtoasingleUSBportthroughabus-poweredhub,itistheresponsibilityofthe-sidedevicetonegotiatethepowerallotmentfromthehosttoguaranteethetotalcurrentdrawdoesnotexceed500mA.TheTPS2511provides100mAofcurrenttoeachUSBdevice.EachUSBdevicecansubsequentlyrequestmorecurrent,whichisgrantedinstepsof100mAup500mAtotal..Thehostmaygrantordenytherequestbasedontheavailablecurrent.Additionally,thesuccessoftheUSBtechnologymakesthemicro-USBconnectorapopularchoiceforwalladaptercables.ThisallowsaportabledevicetochargefrombothawalladapterandUSBportwithonlyoneOnecommondifficultyhasresultedfromthis.AsUSBcharginghasgainedpopularity,the500-mAminimumdefinedbytheUSB2.0Specificationor900mAdefinedintheUSB3.0Specification,has einsufficientformanyhandsets,tabletsandalmediayers(PMP)whichhaveahigherratedchargingcurrent.Walladaptersandcarchargerscanprovidemuchmorecurrentthan500mAor900mAtofastchargeportabledevices.Severalnewstandardshavebeenintroduceddefiningprotocolhandshakingmethodsthatallowhostanddevicestoacknowledgeanddrawadditionalcurrentbeyondthe500mA(definedintheUSB2.0Specification)or900mA(definedintheUSB3.0Specification)minimumwhileusingasinglemicro-USBinputTheTPS2511supportsthreeofthemostcommonUSBBatteryChargingSpecification,Revision1.2municationsIndustryStandardYD/T1591-2009DividerIntheseprotocolstherearethreetypesofchargingportsdefinedtoprovidedifferentchargingcurrentto-sidedevices.Thesechargingportsaredefinedas:StandarddownstreamportChargingdownstreamportDedicatedchargingportTheBC1.2SpecificationdefinesachargingportasadownstreamfacingUSBportthatprovidespowerforchargingportableequipment.Table1showsdifferentportoperatingmodesaccordingtotheBC1.2Table1.OperatingModesPORTBYPORTABLEEQUIPMENTSDP(USBSDP(USBTheBC1.2Specificationdefinestheprotocolnecessarytoallowportableequipmenttodeterminewhattypeofportitisconnectedtosothatitcanallotitsumallowablecurrentdrawn.Thehand-shakingprocessistwosteps.Duringstepone,theprimarydetection,theportableequipmentoutputsanominal0.6VoutputonitsD+lineandreadsthevoltageinputonitsD-line.TheportabledeviceconcludesitisconnectedtoaSDPifthevoltageislessthanthenominaldatadetectvoltageof0.3V.TheportabledeviceconcludesthatitisconnectedtoaChargingPortiftheD-voltageisgreaterthanthenominaldatadetectvoltageof0.3Vandlessthan0.8V.Thesecondstep,thesecondarydetection,isnecessaryforportableequipmenttodeterminebetweenaCDPandaDCP.Theportabledeviceoutputsanominal0.6VoutputonitsD-lineandreadsthevoltageinputonitsD+line.TheportabledeviceconcludesitisconnectedtoaCDPifthedatalinebeingremainsislessthanthenominaldatadetectvoltageof0.3V.TheportabledeviceconcludesitisconnectedtoaDCPifthedatalinebeingreadisgreaterthanthenominaldatadetectvoltageof0.3Vandlessthan0.8V.DedicatedChargingPortAdedicatedchargingport(DCP)isadownstreamportonadevicethatoutputspowerthroughaUSBconnector,butisnotcapableofenumeratingadownstreamdevice,whichgenerallyallowsportabledevicestofastchargeattheirumratedcurrent.AUSBchargerisadevicewithaDCP,suchasawalladapterorcarpoweradapter.ADCPisidentifiedbytheelectricalcharacteristicsofitsdatalines.ThefollowingDCPidentificationcircuitsareusuallyusedtomeetthehandshakingdetectionsofdifferentportabledevices.ShorttheD+LinetotheD–5.0200USBUSB

UDG-Figure24.DCPShortDivider1(DCPApplying2.0VonD+Lineand2.7VonD–Line)orDivider2(DCPApplying2.7VonD+Lineand2.0VonD–Line)5.05.02.7+–2.0+–5.02.0+–2.7+–USBUSB UDG- UDG-Figure25.Divider1 Figure26.Divider2Applying1.2VtotheD+Lineand1.2VtotheD–D200+–AsshowninFigure27,sometabletUSBchargersrequire1.2VontheshortedD200+–USB5.0USB UDG-Figure27.DCPApplying1.2VtotheD+Lineand1.2VtotheD–TheTPS2511isacombinationofacurrent-limitingUSBpowerswitchandanUSBDCPidentificationcontroller.Applicationsincludevehiclepowercharger,walladapterswithUSBDCPandotherUSBchargers.TheTPS2511DCPcontrollerhastheauto-detectfeaturethatmonitorstheD+andD–linevoltagesoftheUSBconnector,providingthecorrectelectricalcharacteristicsontheDPandDMpinsforthecorrectdetectionsofcompliantportabledevicestofastcharge.Theseportabledevicesincludesmartphones,5-Vtablets alTheTPS2511power-distributionswitchisintendedforapplicationswhereheavycapacitiveloadsandshort-circuitsarelikelytobeencountered,incorporatinga70-mΩ,N-channelMOSFETinasinglepackage.ThisdeviceprovideshiccupmodewhenincurrentlimitandOUTvoltageislessthan3.8V(typ)oranovertemperatureprotectionoccursunderanoverloadcondition.Hiccupmodeoperationcanreducetheoutputshort-circuitcurrentdowntoseveralmilliamperes.TheTPS2511providesalogic-levelenableENpintocontrolthedeviceturn-onandtuen-offandanopendrainoutputCSforcompensatingVBUStoaccountforcableI×Rvoltageloss.DCPAuto-TheTPS2511integratesanauto-detectfeaturetosupportdividermode,shortmodeand1.2V/1.2Vmode.Ifadividerdeviceisattached,2.7VisappliedtotheDPpinand2.0VisappliedtotheDMpin.Ifa deviceisattached,theTPS2511automaticallyswitchesintoshortmode.Ifadevicecompliantwiththe1.2V1.2Vchargingschemeisattached,1.2VisappliedonboththeDPpinandtheDMpin.ThefunctionaldiagramofDCPauto-detectfeatureisshowninFigure28.585867 2–+–2.7+–1.21USBShortModeS4:ONS1,S2,S3:1.2VonDPandDMS3,S4:ONS1,S2:Figure28.TPS2511DCPAuto-DetectFunctional

OvercurrenttSCTURNtOS0AFigure29.OUTPinShort-CircuitCurrentinHiccup

Twopossibleoverloadconditionscanoccur.Inthefirstcondition,theoutputhasbeenshortedbeforethedeviceisenabledorbeforethevoltageofINhasbeenapplied.TheTPS2511sensestheshortandimmediayswitchesintohiccupmodeofconstant-currentlimiting.Inthesecondcondition,ashortoranoverloadoccurswhilethedeviceisenabled.Attheinstanttheoverloadoccurs,highcurrentsmayflowforseveralmicrosecondsbeforethecurrent-limitcircuitcanreact.Thedeviceoperatesinconstant-currentmodeforaperiodof16msafterthecurrent-limitcircuithasresponded,thenswitchesintohiccupmode(powercycling).Current-LimitTheTPS2511hasacurrent-limitingthresholdthatisexternallyprogrammedwitharesistor.Equation1andFigure30helpdeterminethetypicalcurrent-limitthreshold:RIOS_TYPRIOS_TYPisinmAandRILIMisinIOS_TYPhasabetteraccuracyifRLMislessthan210 VVIN=5V IOSTYPOUTOUTShortCircuitCurrentLimit-210 110160210260310360410460510560610660Current-LimitProgrammingResistorofILIM_SET-Figure30.TypicalCurrentLimitvsProgrammingCurrentSensingReportTheCSopen-drainoutputisassertedimmediaywhentheOUTpincurrentismorethanabouthalfofthecurrentlimitsetbyaresistoronILIM_SETpin.Built-inhysteresisimprovestheabilitytoresistcurrentnoiseontheOUTpin.TheCSoutputisactivelow. mendedoperatingsinkcurrentislessthan2mAumsinkcurrentis10UndervoltageLockout(UVLO)andEnableTheundervoltagelockout(UVLO)circuitdisablesthepowerswitchandotherfunctionalcircuitsuntiltheinputvoltagereachestheUVLOturn-onthreshold.Built-inhysteresispreventsunwantedoscillationsontheoutputduetoinputvoltagedropfromlargecurrentsurges.ThelogicinputoftheENpindisablesalloftheinternalcircuitrywhilemaintainingthepowerswitchoff.Alogic-highinputontheENpinenablesthedriver,controlcircuits,andpowerswitch.TheENinputvoltageiscompatiblewithbothTTLandCMOSlogiclevels.Soft-Start,ReverseBlockingandDischargeThepowerMOSFETdriverincorporatescircuitrythatcontrolstheriseandfalltimesoftheoutputvoltagetolimitlargecurrentandvoltagesurgesontheinputsupply,andprovidesbuilt-insoft-startfunctionality.TheTPS2511powerswitchblockscurrentfromtheOUTpintotheINpinwhenturnedoffbytheUVLOordisabled.TheTPS2511includesanoutputdischargefunction.A500-Ω(typ.)dischargeresistordissipatesstoredchargeandleakagecurrentontheOUTpinwhenthedeviceisinUVLOordisabled.HoweverasthiscircuitisbiasedfromtheINpin,theoutputdischargeisnotactivewhentheinputapproaches0V.ThermalTheTPS2511providesthermalprotectionfromtwoindependentthermalsensingcircuitsthatmonitortheoperatingtemperatureofthepowerdistributionswitchandturnofffor12seconds(typ)ifthetemperature mendedoperatingconditions.Thedeviceoperatesinconstant-currentmodeduringanover-currentconditionandOUTpinvoltageisabove3.8V(typ),whichhasarelativelylargevoltagedropacrosspowerswitch.Thepowerdissipationinthepackageisproportionaltothevoltagedropacrossthepowerswitch,sothejunctiontemperaturerisesduringtheover-currentcondition.Thefirstthermalsensorturnsoffthepowerswitchwhenthedietemperatureexceeds135°Candthedeviceiswithinthecurrentlimit.Thesecondthermalsensorturnsoffthepowerswitchwhenthedietemperatureexceeds155°Cregardlessofwhetherthepowerswitchisincurrentlimit.Hysteresisisbuiltintoboththermalsensors,andtheswitchturnsonafterthedevicehascooledapproximay10°C.Theswitchcontinuestocycleoffandonuntilthefaultisremoved.APPLICATIONProgrammingtheCurrentLimitTheuser-progrbleRILIMresistorontheILIMIT_SETpinsetsthecurrentlimit.TheTPS2511usesaninternalregulationlooptoprovidearegulatedvoltageontheILIM_SETpin.Thecurrent-limitingthresholdisproportionaltothecurrentsourcedoutoftheILIM_SETpin.The mended1%resistorrangeforRILIMisbetween16.9kΩand750kΩtoensurestabilityoftheinternalregulationloop,althoughnotexceeding210kΩresultsinabetteraccuracy.Manyapplicationsrequirethattheminimumcurrentlimitremainaboveacertaincurrentlevelorthattheumcurrentlimitremainbelowacertaincurrentlevel,soitisimportanttoconsiderthetoleranceoftheovercurrentthresholdwhenselectingavalueforRILIM.TheEquation2andEquation3calculatetheresultingovercurrentthresholdsforagivenexternalresistorvalue(RILIM).ThetracesroutingtheRILIMresistortotheTPS2511shouldbeasshortaspossibletoreduceparasiticeffectsonthecurrentlimitaccuracy.Theequationsandthegraphbelowcanbeusedtoestimatetheminimumand umvariationofthecurrentlimitthresholdforapredefinedresistorvalue.Thisvariationdisregardstheinaccuracyoftheresistor IOS_MIN IOS_MINisinRILIMisin

OUTOUTShortCircuitCurrentLimit-

IOS_MAXisinRILIMisin VINVIN=5IOSIOS IOSVIN=5IOSIOS IOSOUTOUTShortCircuitCurrentLimit-0

0 Figure31.CurrentLimitThresholdvsCurrent Figure32.CurrentLimitThresholdvsCurrentLimit LimitCurrentLimitSetpointInthefollowingexample,choosetheILIM_SETresistortoensurethatTPS2511doesnottripoffunderworstcaseconditionsofcurrentlimitandresistortolerance(assume1%resistortolerance).Forthisexample,IOS_MIN=2100mA.

2100

51228

51228RILIM

2100

22.227

Includingresistortolerance,target

22.227k22.007 RILIM=22.0 VBUSVoltageDropFigure33showsaUSBchargingdesignusingtheTPS2511.IngeneralVBUShassomevoltagelossduetoUSB andTPS2511powerswitchon-state.Thesumofvoltagelossislikelyseveralhundredmillivoltsfrom5VOUTtoVPD_INthatistheinputvoltageofPDwhilethehighchargingcurrentchargesthePD.Forexample,inFigure34,assumingthatthelossis170mΩ(includes100mΩofUSBcableand70mΩofpowerswitch)and5VOUTis5.0V,theinputvoltageofPD(VPD_IN)isabout4.66Vat2.0A.(seeFigure5.0VPD1005.0VPD1001OUTD2ILIM DMPortable3DPEN0.1Power4USBFigure33.TPS2511ChargingSystemSchematicVPDINwithVPDINwithout Figure34.TPS2511CSEquation8throughEquation11refertoFigureThepowersupplyoutputvoltageiscalculatedinEquationR1R2R3

5VOUTandVFBareknown.IfR3isgivenandR1isfixed,R2canbecalculated.The5VOUTvoltagechangewithcompensationisshowninEquation9andEquation10.R2R3R1V

R3 3 IfR1islessthanR3,thenEquation10canbesimplifiedasEquationV5VOUTDivideModeSelectionof5-Wand10-WUSB

TheTPS2511providestwotypesofconnectionsbetweentheDPpinandtheDMpinandbetweentheD+datalineandtheD–datalineoftheUSBconnectorfora5-WUSBchargeranda10-WUSBchargerwithasingleUSBport.Fora5-WUSBcharger,theDPpinisconnectdtotheD–lineandtheDMpinisconnectedtotheD+line.ThisisshowninFigure37andFigure38.ItisnecessarytoapplyDPandDMtoD+andD–ofUSBconnectorfor10-WUSBchargers.SeeFigure35andFigure36.Table2.showsdifferentchargingschemesforboth5-Wand10-WUSBchargersolutionsTable2.ChargingSchemesfor5-Wand10-WUSBUSBCHARGERCONTAININGCHARGING1.2VonbothD+andD–BC1.21.2VonbothD+andD–BC1.25.0

33OUTD5DM4DP2GNDUDG3OUT5DM4DP2GNDUSBUSBUSBFigure35.10-WUSBChargerApplicationwith Figure36.10-WUSBChargerApplicationwithoutPowerSwitch PowerSwitch5.0

33OUTD5DM4DP2GNDUDG3OUT5DM4DP2GNDUSBUSBUSBFigure37.5-WUSBChargerApplicationwith Figure38.5-WUSBChargerApplicationwithoutPowerSwitch PowerSwitchLayoutTPS2511cement.cetheTPS2511neartheUSBoutputconnectorandatlest22-µFOUTpinfiltercapacitor.ConnecttheexposedPowerPADtotheGNDpinandtothesystemgroundneusingaviaINpinbypasscapacitance.cethe0.1-µFbypasscapacitorneartheINpinandmaketheconnectionusingalow-inductancetrace.ILIM_SETpinconnection.CurrentlimitsetpointaccuracycanbecompromisedbystrayleakagefromahighervoltagesourcetotheILIM_SETpin.EnsurethatthereisadequatespacingbetweenINpincopper/traceandILIM_SETpintracetopreventcontaminantbuildupduringthePCBassemblyprocess.ThetracesroutingtheRILIMresistortothedeviceshouldbeasshortaspossibletoreduceparasiticeffectsonthecurrent-limitaccuracy.PACKAGEOPTIONPACKAGINGOrderablePackageEcoMSLPeakOpTempTop-Side8&noSb/Br)CU-40to8&noSb/Br)CU-40to(1)ThemarketingstatusvaluesaredefinedasACTIVE:Product mendedfornewLIFEBUY:TIhasannouncedthatthedevicewillbedis,andalifetime-buyperiodisin mendedfornewdesigns.Deviceisinproductiontosupportexistingcustomers,butTIdoes mendusingthispartinanewPREVIEW:Devicehasbeenannouncedbutisnotinproduction.SamplesmayormaynotbeOBSOLETE:TIhasdistheproductionofthe(2)Econ-Thennedeco-friendlyclassification:Pb-(RoHS),Pb-(RoHSExempt),orGreen(RoHS&noSb/Br)-pleasecheck informationandadditionalproductcontentdetails.TBD:ThePb-/Green nhasnotbeenPb-(RoHS):