www.ti.com
TPS65552A
SLVS567–JULY2005
INTEGRATEDPHOTOFLASHCHARGERANDIGBTDRIVER
FEATURES
••••••••••
HighlyIntegratedSolutiontoReduceComponents
Integrated50-VPowerSwitch,R(ON)=200mΩTypicalIntegratedIGBTDriverHighEfficiency
ProgrammablePeakCurrent,0.95A~1.8AInputVoltageof1.8Vto12V
OptimizedControlLoopforFastChargeTimeSensingAllTriggerFromPrimarySide10-PinMSOP/16-PinQFNPackageProtection
–MAXOnTime
–OverVDSShutdown–ThermalMonitor
APPLICATIONS
••••
DigitalStillCameras(DSC)OpticalFilmCameras
MobilePhonesWithCameraPDAsWithCamera
DESCRIPTION
Thisdeviceoffersacompletesolutionforchargingaphotoflashcapacitorfrombatteryinput,andsub-sequentlydischargingthecapacitortothexenontube.Thedevicehasanintegratedpowerswitch,IGBTdriver,andcontrollogicblocksforchargeapplications.Comparedwithdiscretesolutions,thedevicesignificantlyreducesthecomponentcount,shrinksthesolutionsize,andeasesdesigncom-plexity.AdditionaladvantagesarefastchargingtimeandhighefficiencyduetotheoptimizedPWMcontrolalgorithm.
Otherprovisionsofthedeviceincludesfouroptionsfordeterminingadifferenttargetvoltage,programmablepeakcurrent,thermaldisablemonitor,inputsignalforchargeenable,flashenable,andanoutputsignalforchargecompletionstatus.
VAV5 VVCCVBATSWT11:10or1:11or1:12D1C1VOUTVVFCHGControllerorDQF2U1V_FULLD/A Vonv.orU2Analog CircuitI_PEAKMax ONLOGIC30 mΩPGNDU3orI_PEAK1I_PEAK2VCCF_ONU4G_IGBTSW15[V] drive IGBTTSDNCVCCENAU00 V DSDQF1InternalENAXFULLVVFR1Figure1.TypicalApplicationCircuit(1)
(1)
TIassumesnoresponsibilityfortheconsequencesofuseofthisapplicationcircuit,suchasaninfringementofintellectualpropertyrightsorotherrights,includingpatents,ofthirdparties.
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
PowerPADisatrademarkofTexasInstruments.
PRODUCTPREVIEWinformationconcernsproductsintheforma-tiveordesignphaseofdevelopment.Characteristicdataandotherspecificationsaredesigngoals.TexasInstrumentsreservestherighttochangeordiscontinuetheseproductswithoutnotice.
Copyright©2005,TexasInstrumentsIncorporated
PRODUCT PREVIEWTPS65552A
SLVS567–JULY2005
www.ti.com
Thesedeviceshavelimitedbuilt-inESDprotection.TheleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoamduringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
ORDERINGINFORMATION
TA
-35°Cto85°C-35°Cto85°C
TARGETVOLTAGEat
PRIMARYSIDE
2929
PACKAGEMARKING
BKVBMA
PACKAGE16-pinQFN10-pinMSOP
PARTNUMBERTPS65552ARGTTPS65552ADGQ
ABSOLUTEMAXIMUMRATINGS
overoperatingfree-airtemperaturerange(unlessotherwisenoted)
VCCVBAT
(1)
UNIT
VSSV(SW)VITstgTJ(1)
SupplyvoltageSwitchterminalvoltage
SwitchcurrentbetweenSWandPGND,ISWInputvoltageofCHG,I_PEAK,F_ONStoragetemperature
Maximumjunctiontemperature
-0.6Vto6V-0.6Vto13V-0.6Vto50V
3A-0.3VtoVCC-40°Cto150°C
125°C
PRODUCT PREVIEWStressesbeyondthoselistedunder\"absolutemaximumratings\"maycausepermanentdamagetothedevice.Thesearestressratingsonlyandfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder\"recommendedoperatingconditions\"isnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.
RECOMMENDEDOPERATINGCONDITIONS
MIN
VSSV(SW)
Supplyvoltage,VCCSupplyvoltage,VBATSwitchterminalvoltage,
SwitchcurrentbetweenSWandPGNDOperatingfree-airtemperaturerange
VIHVIL
High-leveldigitalinputvoltageatCHGandF_ONLow-leveldigitalinputvoltageatCHGandF_ON
-352.4
0.6
4.51.8-0.3
NOM
MAX5.51245285
UNITVVVA°CVV
DISSIPATIONRATINGS
PACKAGEMSOPQFN
(1)
RθJA(1)49.08°C/W47.40°C/W
POWERRATING
TA<25°C
2.04W2.11W
POWERRATING
TA=70°C
1.12W1.16W
POWERRATING
TA=85°C
815mW844mW
Thethermalresistance,RθJA,isbasedonasolderedPowerPAD™ona2S2PJEDECboardusingthermalvias.
2
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TPS65552A
SLVS567–JULY2005
ELECTRICALCHARACTERISTICS
TA=25°C,VBAT=4.2V,VCC=5V,V(SW)=4.2V(unlessotherwisenoted)
PARAMETER
R(ONL)V(PKH)(1)V(PKL)(1)ICC1ICC2ICC3Ilkg1Ilkg2R(ONSW)R(IGBT1)R(IGBT2)I(PEAK1)I(PEAK2)V(FULL)V(ZERO)T(SD)(1)tMAXR(INPD)(1)
ONresistanceofXFULL
UpperthresholdvoltageofI_PEAKLowerthresholdvoltageofI_PEAKSupplycurrentfromVBATSupplycurrentfromVCCSupplycurrentfromVCCandVBAT
LeakagecurrentofSWterminalLeakagecurrentofXFULLter-minal
SWONresistancebetweenSWandPGND
G_IGBTpullupresistanceG_IGBTpulldownresistanceUpperpeakofI(SW)LowerpeakofI(SW)
ChargecompletiondetectvoltageatV(SW)
ZerocurrentdetectionatV(SW)ThermalshutdowntemperatureOverVDSdetectionatV(SW)MAXONtime
PulldownresistanceofCHG,F_ON
VCHG=V(F_ON)=4.2VV(XFULL)=5VI(SW)=1AV(G_IGBT)=0VV(G_IGBT)=5VV(I_IPEAK)=3VV(I_IPEAK)=0VTPS65552A
5251.580.7728.711500.9550
0.310511.680.8729201601.280100
CHG=H,V(SW)=0V(freerunbytMAX)CHG=H,V(SW)=0V(freerunbytMAX)CHG=L
272.5
5121115751.780.9729.3601701.45120
TESTCONDITIONS
I(XFULL)=-1mA
2.4
0.6
MIN
TYP1.5
MAX
3
UNITkΩVVµAmAµAµAµAΩΩΩAVmV°CVµskΩA
Specifiedbydesign.
SWITCHINGCHARACTERISTICS
TA=25°C,VBAT=4.2V,VCC=5V,V(SW)=4.2V(unlessotherwisenoted)
PARAMETER
TESTCONDITIONS
F_ON↑↓-G_IGBT↑↓
SWONafterV(SW)dipsfromV(ZERO)
tPD(1)
Propagationdelay
SWOFFafterI(SW)exceedsI(PEAK)XFULL↓afterV(SW)exceedsV(FULL)SWONafterCHG↑SWOFFafterCHG↓
MIN
TYP50452703002020
MAX
UNITnsnsnsnsnsns
(1)Specifiedbydesign.
3
PRODUCT PREVIEWTPS65552A
SLVS567–JULY2005
www.ti.com
PINASSIGNMENT
RGT PACKAGE(TOP VIEW)
NCVBATNCNCDGQ PACKAGE(TOP VIEW)SWSWVCCF_ON
1234
16151413
12
1110
5
6
7
VBAT
PGNDPGNDCHGXFULL
SWVCCF_ONI_PEAK12345Power PAD109876NCPGNDCHGXFULLG_IGBT
I_PEAKG_IGBTNCNC − No internal connection
NCTERMINALFUNCTIONS
PINNUMBERRGT1,2345,8,13,16
6791011,121415
DGQ234–567101
SIGNALSWVCCF_ONNCI_PEAKG_IGBTXFULLCHGPGNDNCVBAT
IIOOII/OOII
PrimarysideswitchPowersupplyvoltageG_IGBTcontrolinput
Noconnection(internallyopen)PeakcurrentcontrolinputIGBTgatedriveroutputChargecompletionoutputChargecontrolinputPowerground
Noconnection(usedbyTI,shouldbeopenpin)Batteryvoltageinput
DESCRIPTION
PRODUCT PREVIEW4
www.ti.com
TPS65552A
SLVS567–JULY2005
VCCVBATSWCHG0 V DSDQF1InternalENAXFULLDQF2U1V_FULLENAU2Max ONU0VCCI_PEAKLogic30 mΩU3I_PEAK1I_PEAK2TSDPGNDNCG_IGBTF_ONU4Figure2.FunctionalBlockDiagram
I/OEquivalentCircuits
CHG, F_ONVCCSWSWCHG,F_ON100 kWPGNDI_PEAKVCCXFULLXFULL30 mWPGNDI_PEAKPGNDVBATG_IGBTPGNDVCCVBAT10 W41 WG_IGBTPGNDPGNDFigure3.I/OEquivalentCircuits
5
PRODUCT PREVIEWTPS65552A
SLVS567–JULY2005
www.ti.com
PRINCIPLESOFOPERATION
CHG(VOUT)XFULLF_ONG_IGBT(ENA)
TimeATimeBTimeCTimeDTimeETimeFTimeGTimeHTimeITimeJFigure4.WholeOperationSequenceChart
PRODUCT PREVIEWStart/StopCharging
TPS65552Ahasoneinternalenablelatch,F1,thatholdsacharge(ON/OFFstatus)ofthedevice.SeeFigure2.TheonlywaytostartchargingistoinputCHG↑(seetimeA/C/HinFigure4).EachtimeCHG↑isreached,theTPS65552Astartscharging.
Therearethreetriggereventstostopcharging:
1.ForcedstopbyinputtingCHG=Lfromthecontroller(seetimeBinFigure4).2.Automaticstopbydetectingfullcharge.VOUTreachesthetargetvalue(seeTimeDinFigure4).3.ProtectedstopbyoverVDSdetection(seeTimeIinFigure4).IndicateChargingStatus
Whenthechargingoperationiscompleted,theTPS65552Adrivesthechargecompletionindicatorpin,XFULL,toGND.XFULLisanopen-draintypeoutput.WhenconnectingtheindicatorLEDtoXFULL,theLEDlightsareonwhenfullycharged.Thecontrollerdetectsthestatusofthedeviceasalogicsignalwhenconnectingapullupresister,R1(seeFigure1).XFULLenablesthecontrollertodetecttheoverVDSprotectionstatususingsoftwaretime.IfoverVDSprotectionoccurs,XFULLnevergoesLduringCHG=H,providedthatthetimerthatstartsatCHG↑stopsatXFULL↑,andtimesoutwithinadesignedperiodofmaximumchargingtimes.ThecontrollercandetectoverVDSattimeout.ThedevicestartschargingattimeH,andoverVDSprotectionoccursatTimeI(seeFigure4).AttimeI,XFULLstaysH,andthecontrollerdetectsoverVDSprotectionwhenthetimerendsattimeJ.Inthisevent,thecontrollerinputsCHG=Ltoterminatetheoperation.
6
www.ti.com
TPS65552A
SLVS567–JULY2005
LOGICOFFONSWCHG
OFFVSWXFULLSW
OFFONOFFOFFONOFFVZEROV
VBAT0 VVAVOUTVSWVFULLVVBAT0 VVOUTVBATV
0 VV0 VVOUTVAVAI
0 AIPEAK/NTURN0 AISWIPEAKII0 AISWTime 1Time 2TTime 3Time 50 AIOUTIPEAK/NTURNIOUTTime 4TFigure5.TimingDiagramatOneSwitchingCycle
Figure6.TimingDiagramatBeginning/Ending
ControlCharging
TheTPS65552Aprovidesthreecomparatorstocontrolcharging.Figure2showstheblockdiagramofTPS65552AandFigure5showsonetimingdiagramswitchingcycle.NotethatemphasisisplacedonTime1andTime3ofthewaveforminFigure5.WhileSWisON(Time1toTime2inFigure5),U3monitorscurrentflowthroughintegratedpower-MOSFETfromSWtoPGND.WhenI(SW)exceedsI(PEAK),SWturnsOFF(Time2inFigure5).WhenSWturnsOFF(Time2inFigure5),themagneticenergyinthetransformerstartsdischarging.Meanwhile,U2monitorsthekickbackvoltageattheSWterminal.Astheenergyisdischarging,thekickbackvoltageisincreasingaccordingtotheincreaseofVOUT(Time2toTime3inFigure5).Whenalmostallenergyisdischarged,thesystemcannotcontinuerectificationviathediode,andthechargingcurrentofIOUTgoestozero(Times3inFigure5).Afterrectificationstops,thesmallamountofenergyleftinthetransformerisreleasedviatheparasiticpath,andthekickbackvoltagereacheszero(Time3toTime4inFigure5).Duringthisperiod,U2makesSWturnONwhen(V(SW)-VBAT)dipsfromV(ZERO)(Time5inFigure5).Intheactualcircuit,theperiodbetweenTime4andTime5inFigure5issmallordoesnotappeardependentonthedelaytimeoftheU2detectiontoSWON.U1alsomonitorsthekickbackvoltage.When(V(SW)-VBAT)exceedsV(FULL),TPS65552Astopscharging(seeFigure6).InFigure5andFigure6,ONtimeisalwaysthesameperiodineveryswitching.TheONtimeiscalculatedbyEquation1.Thisequationisnotdependentonoutputvoltage.
æIPEAKö
÷tON= LççVBAT÷èø
(1)
However,OFFtimeisdependantonoutputvoltage.Astheoutputvoltagegetshigher,theOFFtimegetsshorter
(seeEquation2).
7
PRODUCT PREVIEWI
IOUTIPEAKISWTPS65552A
SLVS567–JULY2005
www.ti.com
æIPEAKö
÷tOFF= N_TURN x LççVOUT÷èø
(2)
ReferenceVoltage
TheTPS65552Adoesnothaveitsownreferencevoltagecircuitinside,andtheTPS65552AusestheVCCinput
voltageasareferencetodetectI(PEAK),V(ZERO),andV(FULL).Therefore,voltageinputatVCCisapproximately5V.
VCCdiffersfrom5Vbysystemlimitations.Table1showsthedependenceofeachfunctionofTPS65552AtoVCC.
Table1.VCCDependenceofTPS65552A
PARAMETER
I(PEAK1)I(PEAK2)
V(FULL)
TPS65552AoverVDS
EQUATION
4.5
0.52xVCC-0.920.24xVCC-0.33
5.8xVCC0.24xVCC
1.420.7526.11.08
VCC51.680.8729.01.2
5.51.940.9931.91.32
PRODUCT PREVIEWTerminationVoltageSetting
Toobtainadifferentterminationvoltage,transformersofdifferentturnratioarerequired.Table2showsthematrixofterminationvoltageandtheturnratioofthetransformer.ThetableonlyshowsaONEtointegerratiowhiletherearenolimitationsforaturnratioofthetransformerinarealapplicationcircuit,example1:10.5(=10:105).
Table2.TerminationVoltageSettingTable
TPS65552A29[V]
1:101:111:12
290319348
8
www.ti.com
TPS65552A
SLVS567–JULY2005
ProgrammingPeakCurrent
TheTPS65552AprovidesamethodtoprogramI(PEAK)throughtheinputvoltageoftheI_PEAKterminal.Figure7showshowtoprogramI(PEAK).
I_PEAKinputistreatedasalogicinput,whenitsvoltageisbelowV(PKL)(0.6V)andaboveV(PKH)(2.4V).BetweenV(PKL)andV(PKH),I_PEAKinputistreatedasananaloginput.Usingthischaracteristic,I(PEAK)canbesetbythelogicsignalorbyananaloginput.
Typicalusagesofthisfunctionare:
1.ChargingI(PEAK)dependsonthebatteryvoltage.LargeI(PEAK)foranadequatebattery,smallI(PEAK)forapoorbattery.
2.ReducingI(PEAK)whenzoominglens(motorworks);thisavoidsshutdownofthebatterywithalargecurrentoutput.InFigure1,threeoptionalconnectionstoI_PEAKareshown.
1.UsethecontrollertotreatI_PEAKasthelogicinputpin.Thisoptionistheeasiest.
2.UseaD/AconvertertoforceI(PEAK)tofollowanaloginformation,suchasbatteryvoltage.3.UseananalogcircuittoachievethesameresultsastheD/Aconverter.
2
1.80
1.60I(SW) [A]1.40
1.20
10.80
00.511.522.533.5V(I_PEAK) [V]
Figure7.I_PEAKvsI(SW)
IGBTDriverControl
TheIGBTdriverprovidedbytheTPS65552Aisasimplebufferinthelogicaltable.Table3showsthefunction(seeFigure4).Table3.IBGTDriverFunctionTable
F_ONLH
G_IGBT
LH
9
PRODUCT PREVIEWTPS65552A
SLVS567–JULY2005
www.ti.com
Protections
TPS65552Aprovidesthreeprotections:thermalshutdown,maxontime,andovervoltageatpowerSW.ThermalShutdown
WhenTPS65552Aoverheats,allfunctionsstop.TheonlywaytorecoveristowaitfortheTPS65552Atocooldown.ThisprotectionisnotthroughSHUTDOWN,sotheTPS65552ArestartschargingifCHGstaysHduringthewholeoverheatedperiod.MAXONTime
Topreventaconditionsuchaspullingcurrentfromapoorpowersource(i.e.,analmostemptybattery),theTPS65552AprovidesamaximumONtimeprotection.IftheONtimeexceedstMAX,theTPS555xisforcedOFFregardlessofI(PEAK)detection.OvervoltageatPowerSW
Toavoidthestressofpowerdissipation,theTPS65552AprovidesanovervoltagemonitorfunctionattheSWterminal.Ifthisprotectionoccurs,theovervoltagestatusislatched(seeFigure4anditsdescriptions).
Thisfunctionalsoprotectsshort-circuitofthesecondaryside.Intheshort-circuitstateofthesecondaryside,almost100%ofthebatteryvoltageissuppliedtoSW,whichstressesthedevice.
PRODUCT PREVIEWPCBInformation
D1Note 15VPOWER UNIT3VNote 4C2C1T11:10or1:11or1:12R1VOUTVCCVBATSWCHG0 V DSDQF1InternalENAR1DQF2XIFULLU1V_FULLVCCENAU0U2I_PEAKMax ONLOGICNote 230 mΩPGNDU3I_PEAK1I_PEAK2VCCF_ONG_IGBTU4SW15 V Drive IGBTTSDNCNote 3Figure8.PCBDesignGuideline(1)
(1)
TIassumesnoresponsibilityfortheconsequencesofuseofthisapplicationcircuit,suchasaninfringementofintellectualpropertyrightsorotherrights,includingpatents,ofthirdparties.
10
www.ti.com
TPS65552A
SLVS567–JULY2005
Figure8showskeypointswhendesigningaPCB.
1.InmanyDSCdesigns,parasiticresistancethatcannotbeignored,existsonthepowerlinepathfromthebatterytotheprimarysideturnofthetransformer.TheTPS65552AhasonegroundpointconnectioninsidetheICatthePGNDPAD.So,thePCBlayoutshouldalsokeepaone-pointgroundconnectionatthePGNDterminalofTPS65552A.
2.Theloopindicatedbydotted-linesislaidoutassmallaspossibletoreducetheopenareaoftheloop.
3.TheTPS65552AusestheVCCinputasareferencevoltage.ConsideringNote1,thegroundofthepowerunitthatsourcesVCCisconnectedtoPGND.
4.RegardingNote3,thebypasscapacitor,C2,isrequiredtoavoidgroundingnoise.
AdditionalTechnicalInformation
TIprovidesanapplicationnoteforthisdevice.Formoretechnicalinformation,pleasefindtheapplicationnoteontheTIWebsiteorconsultyoursalescontact.LiteraturenumberSLVA197.Theapplicationnoteprovidesthefollowinginformation.1.Recommendedexternalparts2.PCBlayout
3.Detailedoperationtheory4.Calculationoftheefficiency
5.Keypointstodesignyoursystem
11
PRODUCT PREVIEWPACKAGE OPTION ADDENDUM
www.ti.com
23-Jul-2011
PACKAGING INFORMATION
Orderable DeviceTPS65552ADGQTPS65552ADGQG4TPS65552ADGQRTPS65552ADGQRG4TPS65552ARGTRTPS65552ARGTRE3
(1)
Status
(1)
Package TypePackage
DrawingMSOP-PowerPADMSOP-PowerPADMSOP-PowerPADMSOP-PowerPADQFNQFN
DGQDGQDGQDGQRGTRGT
Pins101010101616
Package Qty
808025002500
Eco Plan
(2)
Lead/Ball FinishCall TICall TI
MSL Peak Temp
(3)
Samples(Requires Login)
ACTIVEACTIVEACTIVEACTIVEACTIVEACTIVE
Green (RoHS& no Sb/Br)Green (RoHS& no Sb/Br)Green (RoHS& no Sb/Br)Green (RoHS& no Sb/Br)
TBDTBD
Level-2-250C-1 YEARLevel-2-250C-1 YEAR
CU NIPDAUAGLevel-2-250C-1 YEARCU NIPDAUAGLevel-2-250C-1 YEAR
Call TICall TI
Call TICall TI
The marketing status values are defined as follows:ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.PREVIEW: Device has been announced but is not in production. Samples may or may not be available.OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availabilityinformation and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms \"Lead-Free\" or \"Pb-Free\" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement thatlead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used betweenthe die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines \"Green\" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weightin homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on informationprovided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken andcontinues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
23-Jul-2011
Addendum-Page 2
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