設(shè)計參考、源碼手冊1746個zhcs111a

Figure2.TPS62170(adjustableoutput controlcontrol*Thispinisconnectedtoapulldownresistorinternally(seeDetailedDescriptionsection).

Figure3.TPS62171/2/3(fixedoutputPARAMETERMEASUREMENTListof17V,1AStep-DownConverter,TPS62170DSG,Texas2.2uH,1.4A,3x2.8x1.210μF,25V,22μF,6.3V,dependingondependingon100kΩ,Chip,0603,1/16W,

TYPICALTableofvsOutputCurrent,vsInput5-OutputvsOutputcurrent(LoadvsInputVoltage(LineSwitchingvsInputvsOutputQuiescentvsInputShutdownvsInputPowerFETvsInputVoltage(High-Side,Low-19,OutputVoltagevsoutputumOutputvsInput-PSM-Mode23,LoadTransient25-29,TypicalPowerSaveModeTypicalModeEfficiencyEfficiency

OUTPUT INPUTEfficiencyEfficiency 0 OutputCurrent InputVoltage Figure5. Figure6.EfficiencyEfficiency

OUTPUT INPUTEfficiencyEfficiency 0 1213141516OutputCurrent InputVoltage Figure7. Figure8.EfficiencyEfficiency

OUTPUT INPUTEfficiencyEfficiency 0 345678910111213141516OutputCurrent InputVoltage Figure9. Figure10.EfficiencyEfficiency

OUTPUT INPUTEfficiencyEfficiency 0 345678910111213141516OutputCurrent InputVoltage Figure11. Figure12.3

OUTPUT OUTPUT OUTPUT INPUT3OutputVoltageOutputVoltageOutputVoltageOutputVoltage3 33 0

3

OutputCurrent InputVoltage Figure13.OutputVoltageAccuracy(LoadRegulation) Figure14.OutputVoltageAccuracy(LineRegulation)SWITCHINGFREQUENCY SWITCHINGFREQUENCY OUTPUT INPUT SwitchingFrequencySwitchingFrequencySwitchingFrequency 0

0

0 OutputCurrent InputVoltage Figure15.Switching Figure16.SwitchingInputInputCurrent

INPUT INPUT INPUT INPUTInputInputCurrent 12 18.0 12 18.0InputVoltage InputVoltage Figure17.Quiescent Figure18.ShutdownRDSonRDSonHigh?Side

STATICDRAIN-SOURCE- STATICDRAIN-SOURCE- INPUT INPUTRDSonRDSonLow?Side 12 6 18.0InputVoltage InputVoltage Figure19.High-Side Figure20.Low-Side0

OUTPUTVOLTAGE OUTPUT OUTPUT INPUTOutputVoltageOutputVoltageRipple

000

OutputOutputCurrent0 0

910111213141516OutputCurrent InputVoltageFigure21.OutputVoltage Figure22.umOutputOUTPUT OUTPUT Figure23.toPSMModeTransition Figure24.PSMtoModeTransitionTRANSIENTRESPONSE TRANSIENTRESPONSE Figure25.LoadTransientResponseinMode Figure26.LoadTransientResponsefromPowerSave(200mAto500mA) Mode(100mAto500mA)TRANSIENT TRANSIENT Figure27.LoadTransientResponseinMode Figure28.LoadTransientResponseinMode(200mAto500mA),risingedge (200mAto500mA),fallingedgeSTARTUPTO STARTUPTO Figure29.Startupwith Figure30.StartupwithPSMMODE MODEOPERATION Figure31.TypicalOperationinPowerSaveMode Figure32.TypicalOperationinmode(Iout=500mA)DETAILEDDeviceTheTPS6217XsynchronousswitchedmodepowerconvertersarebasedonDCS-Control?(DirectControlwithSeamlessTransitionintoPowerSaveMode),anadvancedregulationtopology,thatcombinestheadvantagesofhysteretic,voltagemodeandcurrentmodecontrolincludinganACloopdirectlyassociatedtotheoutputvoltage.Thiscontrollooptakesinformationaboutoutputvoltagechangesandfeedsitdirectlytoafastcomparatorstage.Itsetstheswitchingfrequency,whichisconstantforsteadystateoperatingconditions,andprovidesimmediateresponsetodynamicloadchanges.TogetaccurateDCloadregulation,avoltagefeedbackloopisused.TheinternallycompensatedregulationnetworkachievesfastandstableoperationwithsmallexternalcomponentsandlowESRcapacitors.TheDCS-ControlTMtopologysupports (PulseWidthModulation)modeformediumandheavyloadconditionsandaPowerSaveModeatlightloads.During,itoperatesatitsnominalswitchingfrequencyincontinuousconductionmode.Thisfrequencyistypicallyabout2.25MHzwithacontrolledfrequencyvariationdependingontheinputvoltage.Iftheloadcurrentdecreases,theconverterentersPowerSaveModetosustainhighefficiencydowntoverylightloads.InPowerSaveModetheswitchingfrequencydecreaseslinearlywiththeloadcurrent.SinceDCS-ControlTMsupportsbothoperationmodeswithinonesinglebuildingblock,thetransitionfrom toPowerSaveModeisseamlesswithouteffectsontheoutputvoltage.Fixedoutputvoltageversionsprovidesmallestsolutionsizeandlowestcurrentconsumption,requiringonly3externalcomponents.Aninternalcurrentlimitsupportsnominaloutputcurrentsofupto500mA.TheTPS6217XfamilyoffersbothexcellentDCvoltageandsuperiorloadtransientregulation,combinedwithverylowoutputvoltageripple,minimizinginterferencewithRFcircuits.PulseWidthModulation()TheTPS6217Xoperateswithpulsewidthmodulationincontinuousconductionmode(CCM)withanominalswitchingfrequencyofabout2.25MHz.Thefrequencyvariationin iscontrolledanddependsonVIN,VOUTandtheinductance.Thedeviceoperatesin modeaslongtheoutputcurrentishigherthanhalftheinductor'sripplecurrent.Tomaintainhighefficiencyatlightloads,thedeviceentersPowerSaveModeattheboundarytodiscontinuousconductionmode(DCM).Thishappensiftheoutputcurrent essmallerthanhalftheinductor'sripplecurrent.PowerSaveModeTheTPS6217X'sbuiltinPowerSaveModewillbeenteredseamlessly,iftheloadcurrentdecreases.Thissecuresahighefficiencyinlightloadoperation.ThedeviceremainsinPowerSaveModeaslongastheinductorcurrentisInPowerSaveModetheswitchingfrequencydecreaseslinearlywiththeloadcurrentmaintaininghighefficiency.ThetransitionintoandoutofPowerSaveModehappenswithintheentireregulationschemeandisseamlessinbothdirections.TPS6217Xincludesafixedon-timecircuitry.Thison-time,insteady-stateoperation,canbeestimated

VOUT420ns Forverysmalloutputvoltages,theon-timeincreasesbeyondtheresultofEquation1,tostayaboveanabsoluteminimumon-time,tON(min),whichisaround80nstolimitswitchinglosses.ThepeakinductorcurrentinPSMcanbeapproximatedby:

VOUT)

WhenVINdecreasestotypically15%aboveVOUT,theTPS6217Xwon'tenterPowerSaveMode,regardlessoftheloadcurrent.Thedevicemaintainsoutputregulationin 100%Duty-CycleThedutycycleofthebuckconverterisgivenbyD=Vout/Vinandincreasesastheinputvoltagecomesclosetotheoutputvoltage.Inthiscase,thedevicestarts100%dutycycleoperationturningonthehigh-sideswitch100%ofthetime.Thehigh-sideswitchstaysturnedonaslongastheoutputvoltageisbelowtheinternalsetpoint.Thisallowstheconversionofsmallinputtooutputvoltagedifferences,e.g.forlongestoperationtimeofbattery-poweredapplications.In100%dutycyclemode,thelow-sideFETisswitchedoff.Theminimuminputvoltagetomaintainoutputvoltageregulation,dependingontheloadcurrentandtheoutputvoltagelevel,canbecalculatedas:

VOUT(min)IOUTRDS(on)

IOUTistheoutputRDS(on)istheRDS(on)ofthehigh-sideFETandRListhe oftheinductorEnable/ShutdownWhenEnable(EN)issetHigh,thedevicestartsShutdownisdifENispulledLowwithashutdowncurrentoftypically1.5μA.Duringshutdown,theinternalpowerMOSFETsaswellastheentirecontrolcircuitryareturnedoff.Theinternalresistivedividerpullsdowntheoutputvoltagesmoothly.IftheENpinisLow,aninternalpull-downresistorofabout400kΩisconnectedandkeepsitLow,toavoidbouncing.ToavoidON/OFFoscillations,aminimumslewrateofabout50mV/sis fortheENsignal.ConnectingtheENpintoanappropriateoutputsignalofanotherpowerrailprovidessequencingofmultiplepowerTheinternalsoftstartcircuitrycontrolstheoutputvoltageslopeduringstartup.Thisavoidsexcessiveinrushcurrentandensuresacontrolledoutputvoltagerisetime.Italsopreventsunwantedvoltagedropsfromhigh-impedancepowersourcesorbatteries.WhenENissettostartdeviceoperation,thedevicestartsswitchingafteradelayofabout50μsandVOUTriseswithaslopeofabout25mV/μs.SeeFigure29andFigure30fortypicalstartupTheTPS6217Xcanstartintoapre-biasedoutput.Duringmonotonicpre-biasedstartup,thelow-sideMOSFETisnotallowedtoturnonuntilthedevice'sinternalrampsetsanoutputvoltageabovethepre-biasvoltage.CurrentLimitAndShortCircuitTheTPS6217Xdevicesareprotectedagainstheavyloadandshortcircuitevents.Atheavyloads,thecurrentlimitdeterminesthe umoutputcurrent.Ifthecurrentlimitisreached,thehigh-sideFETwillbeturnedoff.Avoidingshootthroughcurrent,thelow-sideFETwillbeswitchedontosinktheinductorcurrent.Thehigh-sideFETwillturnonagain,onlyifthecurrentinthelow-sideFEThasdecreasedbelowthelowsidecurrentlimitthreshold.Theoutputcurrentofthedeviceislimitedbythecurrentlimit(seeELECTRICALCHARACTERISTICS).Duetointernalpropagationdelay,theactualcurrentcanexceedthestaticcurrentlimitduringthattime.Thedynamiccurrentlimitcanbecalculatedasfollows:I

VL

ILIMFisthestaticcurrentlimit,specifiedintheelectricalcharacteristictable,Listheinductorvalue,VListhevoltageacrosstheinductorandtPDistheinternalpropagationdelay.Thedynamichighsideswitchpeakcurrentcanbecalculatedas

HS

CareonthecurrentlimithastobetakeniftheinputvoltageishighandverysmallinductancesarePowerGoodTheTPS6217Xhasabuiltinpowergood(PG)functiontoindicatewhethertheoutputvoltagehasreacheditsappropriatelevelornot.ThePGsignalcanbeusedforstartupsequencingofmultiplerails.ThePGpinisanopen-drainoutputthatrequiresapull-upresistor(toanyvoltagebelow7V).Itcansink2mAofcurrentandmaintainitsspecifiedlogiclowlevel.ItishighimpedancewhenthedeviceisturnedoffduetoEN,UVLOorthermalshutdown.UnderVoltageLockoutIftheinputvoltagedrops,theundervoltagelockoutpreventsmisoperationofthedevicebyswitchingoffboththepowerFETs.Theundervoltagelockoutthresholdissettypicallyto2.7V.ThedeviceisfullyoperationalforvoltagesabovetheUVLOthresholdandturnsoffiftheinputvoltagetripsthethreshold.Theconverterstartsoperationagainoncetheinputvoltageexceedsthethresholdbyahysteresisoftypically180mV.ThermalThejunctiontemperature(Tj)ofthedeviceismonitoredbyaninternaltemperaturesensor.IfTjexceeds160°C(typ),thedevicegoesintothermalshutdown.Boththehigh-sideandlow-sidepowerFETsareturnedoffandPGgoeshighimpedance.WhenTjdecreasesbelowthehysteresisamount,theconverterresumesnormaloperation,beginningwithSoftStart.Toavoidunstableconditions,ahysteresisoftypically20°Cisimplementedonthethermalshutdowntemperature.APPLICATIONThefollowinginformationisintendedtobeaguidelinethroughtheindividualpowersupplydesignProgrammingTheOutputForfixedoutputversions,theFBpinispulleddowninternallyandmaybeleftfloating.itis mendedtoconnectittoAGNDtoimprovethermal.Theadjustableversioncanbeprogrammedforoutputvoltagesfrom0.9Vto6VbyusingaresistivedividerfromVOUTtoAGND.ThevoltageattheFBpinisregulatedto800mV.ThevalueoftheoutputvoltageissetbytheselectionoftheresistivedividerfromEquation6.Itis tochooseresistorvalueswhichallowacrosscurrentofatleast2uA,meaningthevalueofR2shouldn'texceed400kΩ.Lowerresistorvaluesare mendedforhighestaccuracyandmostrobustdesign.Forapplicationsrequiringlowestcurrentconsumption,theuseoffixedoutputvoltageversionsis IncasetheFBpingetsopened,thedeviceclampstheoutputvoltageattheVOSpintoaboutExternalComponentTheexternalcomponentshavetofulfilltheneedsoftheapplication,butalsothestabilitycriteriaofthedevicescontrolloop.TheTPS6217Xisoptimizedtoworkwithinarangeofexternalcomponents.TheLCoutputfiltersinductanceandcapacitancehavetobeconsideredtogether,creatingadoublepole,responsibleforthecornerfrequencyoftheconverter(seeOutputFilterAndLoopStabilitysection).Table1canbeusedtosimplifytheoutputfiltercomponentselection.Table mendedLCOutputFilter√√√√√√√√Thevaluesinthetablearenominalvalues.Variationsoftypically±20%duetotolerance,saturationandDCbiasareThisLCcombinationisthestandardvalue mendedformostMoredetailedinformationonfurtherLCcombinationscanbefoundinInductorTheinductorselectionisaffectedbyseveraleffectslikeinductorripplecurrent,outputripplevoltage,-to-PSMtransitionpointandefficiency.Inaddition,theinductorselectedhastoberatedforappropriatesaturationcurrentandDC(DCR).Equation7andEquation8calculatethe uminductorcurrentunderstaticload

IOUT

2

VIN(max) OUT

SW IL(max)istheuminductorΔIListhePeaktoPeakInductorRippleCurrent,L(min)istheminimumeffectiveinductorvalueandfSWistheactual SwitchingFrequency.Calculatingtheuminductorcurrentusingtheactualoperatingconditionsgivestheminimumsaturationcurrentoftheinductorneeded.Amarginofabout20%is mendedtoadd.Alargerinductorvalueisalsousefultogetlowerripplecurrent,butincreasesthetransientresponsetimeandsizeaswell.ThefollowinginductorshavebeenusedwiththeTPS6217Xandare mendedforuse:Table2.ListofInductanceCurrent[A]Dimensions[LxBxH]2.2μH,3.0x2.8x2.2μH,3.0x2.5x2.2μH,2.5x2.0x2.2μH,3.0x3.0x3.3μH,3.0x3.0x2.2μH,1.9x2.0x3.3μH,1.9x2.0x3.3μH,3.0x3.0x2.2μH,2.8x2.3x3.3μH,2.8x2.3x3.3μH,2.8x2.8x2.2uH,2.0x2.5x2.2uH,3.0x3.0xTaiyo2.2μH,2.0x1.25xTaiyo3.3μH,2.0x1.25xTaiyo(1)IRMSat40°CriseorISATat30%TPS6217Xcanberunwithaninductoraslowas2.2μH.However,forapplicationsrunningwithlowinput3.3μHis mended,toallowthefulloutputcurrent.TheinductorvaluealsodeterminestheloadcurrentatwhichPowerSaveModeisentered:1 2UsingEquation8,thiscurrentlevelcanbeadjustedbychangingtheinductorCapacitorOutput mendedvaluefortheoutputcapacitoris22uF.ThearchitectureoftheTPS6217Xallowstheuseoftinyceramicoutputcapacitorswithlowequivalentseries (ESR).Thesecapacitorsprovidelowoutputvoltagerippleandare mended.Tokeepitslow uptohighfrequenciesandtogetnarrowcapacitancevariationwithtemperature,it's mendedtouseX7RorX5Rdielectric.UsingahighervaluecanhavesomeadvantageslikesmallervoltagerippleandatighterDCoutputaccuracyinPowerSaveMode(seeSLVA463).Note:Inpowersavemode,theoutputvoltagerippledependsontheoutputcapacitance,itsESRandthepeakinductorcurrent.UsingceramiccapacitorsprovidessmallESRandlowripple.InputFormostapplications,10μFwillbesufficientandis mended,thoughalargervaluereducesinputcurrentripplefurther.Theinputcapacitorbufferstheinputvoltagefortransienteventsandalsodecouplestheconverterfromthesupply.AlowESRmultilayerceramiccapacitoris mendedforbestfilteringandshouldbecedbetweenVINandGNDascloseaspossibletothosepins.DCBiaseffect:HighcapacitanceceramiccapacitorshaveaDCBiaseffect,whichwillhaveastronginfluenceonthefinaleffectivecapacitance.Thereforetherightcapacitorvaluehastobechosencarefully.PackagesizeandvoltageratingincombinationwithdielectricmaterialareresponsiblefordifferencesbetweentheratedcapacitorvalueandtheeffectiveOutputFilterAndLoopThedevicesoftheTPS6217XfamilyareinternallycompensatedtobestablewithL-CfiltercombinationscorrespondingtoacornerfrequencytobecalculatedwithEquation10:f

ProvennominalvaluesforinductanceandceramiccapacitancearegiveninTable1andare mendedforuse.Differentvaluesmaywork,butcarehastobetakenontheloopstabilitywhichwillbeaffected.MoreinformationincludingadetailedL-CstabilitymatrixcanbefoundinSLVA463.TheTPS6217Xdevices,bothfixedandadjustableversions,includeaninternal25pFfeedforwardcapacitor,connectedbetweentheVOSandFBpins.Thiscapacitorimpactsthefrequencybehaviorandsetsapoleandzerointhecontrolloopwiththeresistorsofthefeedbackdivider,perEquation11andEquation12:1ff

2R125 12 2

225

ThoughtheTPS6217Xdevicesarestablewithoutthepoleandzerobeinginaparticularlocation,adjustingtheirlocationtothespecificneedsoftheapplicationcanprovidebetterperformanceinPowerSavemodeand/orimprovedtransientresponse.Anexternalfeedforwardcapacitorcanalsobeadded.Amoredetaileddiscussionontheoptimizationforstabilityvs.transientresponsecanbefoundinSLVA289andSLVA466.Ifusingceramiccapacitors,theDCbiaseffecthastobeconsidered.TheDCbiaseffectresultsinadropineffectivecapacitanceasthevoltageacrossthecapacitorincreases(seeDCBiaseffectNOTEinCapacitorselectionsection).LayoutAproperlayoutiscriticalfortheoperationofaswitchedmodepowersupply,evenmoreathighswitchingfrequencies.ThereforethePCBlayoutoftheTPS6217Xdemandscarefulattentiontoensureoperationandtogettheperformancespecified.Apoorlayoutcanleadtoissueslikepoorregulation(bothlineandload),stabilityandaccuracyweaknesses,increasedEMIradiationandnoisesensitivity.Providelowinductiveandresistivepathstogroundforloopswithhighdi/dt.Thereforepathsconductingtheswitchedloadcurrentshouldbeasshortandwideaspossible.Providelowcapacitivepaths(withrespecttoallothernodes)forwireswithhighdv/dt.ThereforetheinputandoutputcapacitanceshouldbecedascloseaspossibletotheICpinsandparallelwiringoverlongdistancesaswellasnarrowtracesshouldbeavoided.Loopswhichconductanalternatingcurrentshouldoutlineanareaassmallaspossible,asthisareaisproportionaltotheenergyradiated.AlsosensitivenodeslikeFBandVOSshouldbeconnectedwithshortwires,notnearbyhighdv/dtsignals(e.g.SW).Astheycarryinformationabouttheoutputvoltage,theyshouldbeconnectedascloseaspossibletotheactualoutputvoltage(attheoutputcapacitor).Signalsnotassignedtopowertransmission(e.g.feedbackdivider)shouldrefertothesignalground(AGND)andalwaysbeseparatedfromthepowerground(PGND).Insummary,theinputcapacitorshouldbecedascloseaspossibletotheVINandPGNDpinoftheIC.Thisconnectionsshouldbedonewithwideandshorttraces.TheoutputcapacitorshouldbecedsuchthatitsgroundisascloseaspossibletotheIC'sPGNDpins-avoidingadditionalvoltagedropintraces.Thisconnectionshouldalsobemadeshortandwide.TheinductorshouldbecedclosetotheSWpinandconnectdirectlytotheoutputcapacitor-minimizingtheloopareabetweentheSWpin,inductor,outputcapacitorandPGNDpin.Thefeedbackresistors,R1andR2,shouldbecedclosetotheICandconnectdirectlytotheAGNDandFBpins.Thoseconnections(includingVOUT)totheresistorsandevenmoretotheVOSpinshouldstayawayfromnoisesources,suchastheinductor.TheVOSpinshouldconnectintheshortestwaytoVOUTattheoutputcapacitor,whiletheVOUTconnectiontothefeedbackdividercanconnectattheload.Asinglepointgroundingschemeshouldbeimplementedwithallgrounds(AGND,PGNDandthethermalpad)connectingattheIC'sexposedthermalpad.Seeforthe mendedlayoutoftheTPS6217X.MoredetailedinformationcanbefoundintheEVMUsersGuide,SLVU483.LTheExposedThermalPadmustbesolderedtothecircuitboardformechanicalreliabilityandtoachieveappropriatepowerdissipation.AlthoughtheExposedThermalPadcanbeconnectedtoafloatingcircuitboardtrace,LFigure33.LayoutTHERMALImplementationofintegratedcircuitsinlow-profileandfine-pitchsurface-mountpackagestypicallyrequiresspecialattentiontopowerdissipation.Manysystem-dependentissuessuchasthermalcoupling,airflow,addedheatsinksandconvectionsurfaces,andthepresenceofotherheat-generatingcomponentsaffectthepower-dissipationlimitsofagivencomponent.ThreebasicapproachesforenhancingthermalperformancearelistedImprovingthepowerdissipationcapabilityofthePCBImprovingthethermalcouplingofthecomponenttothePCBbysolderingtheExposedThermalIntroducingairflowintheFormoredetailsonhowtousethethermalparameters,seetheapplicationnotes:ThermalCharacteristicsApplicationNote(SZZA017),and(SPRA953).TheTPS6217Xisdesignedfora umoperatingjunctiontemperature(Tj)of125°C.Thereforethe outputpowerislimitedbythepowerlossesthatcanbedissipatedovertheactualthermal ,givenbythepackageandthesurroundingPCBstructures.Ifthethermal ofthepackageisgiven,thesizeofthesurroundingcopperareaandaproperthermalconnectionoftheICcanreducethethermal .Togetanimprovedthermalbehavior,it's mendedtousetoplayermetaltoconnectthedevicewithwideandthickmetallines.InternalgroundlayerscanconnecttoviasdirectlyundertheICforimprovedthermalperformance.Ifshortcircuitoroverloadconditionsarepresent,thedeviceisprotectedbylimitinginternalpowerTypicalFigure34.5V/1APowerFigure35.3.3V/1APowerFigure36.2.5V/1APowerFigure37.1.8V/1APowerFigure38.1.5V/1APowerFigure39.1.2V/1APowerFigure40.1V/1APower

Figure41.-5VInvertingPowerTheTPS6217XcanbeusedasinvertingpowersupplybyrearrangingexternalcircuitryasshowninFigure41.AstheformerGNDnodenowrepresentsavoltagelevelbelowsystemground,thevoltagedifferencebetweenVINandVOUThastobelimitedforoperationtothe umsupplyvoltageof17V.Ininvertingoperationmode,theoutputcurrentcapabilityisreducedbytheinputtooutputvoltageconversion

V

Thetransferfunctionoftheinvertingpowersupplyconfigurationdiffersfromthebuckmodetransferfunction,incorporatingaRightHalfneZeroadditionally.Theloopstabilityhastobeadaptedandanoutputcapacitanceofatleast22uFis mended.AdetaileddesignexampleisgiveninSLVA469.REVISIONChangesfromOriginal(November2011)toRevision ChangedtheORDERINGINFORMATIONpackage PACKAGEOPTIONPACKAGEOPTIONPACKAGINGOrderablePackagePackageEcoLead/BallMSLPeakOpTempTop-Side8&noSb/Br)CU-40to8&noSb/Br)CU-40to8&noSb/Br)CU-40to8&noSb/Br)CU-40to8&noSb/Br)CU-40to8&noSb/Br)CU-40to8&noSb/Br)CU-40to8&noSb/Br)CU-40to(1)ThemarketingstatusvaluesaredefinedasACTIVE:Product mendedfornewLIFEBUY:TIhasannouncedthatthedevicewillbedis,andalifetime-buyperiodisinNRND: mendedfornewdesigns.Deviceisinproductiontosupportexist