C2wwe2013年12月24日

March20132009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
3FAN5701—Compact6-LEDDriverforMobilePlatformsFAN5701—Compact6-LEDDriverforMobilePlatformsFeaturesSix(6)ParallelLEDs(upto30mAeach)TotalPackageLoadCurrentCapability:180mATwoDefaultGroupsofFour(4)andTwo(2)LEDsforMainandSub-DisplayLightingwithIndividualPWMDimmingControlsthatOperateupto20kHz>600:1DimmingRatiofor100HzPWMFrequencyUpto92%EfficiencyBuilt-in1.
5xChargePumpwithLow-DropoutBypassSwitchWideInputRange:2.
7Vto5.
5VVOUTOver-VoltageandShort-CircuitProtectionOver-TemperatureProtection1.
2MHzSwitchingFrequencyforSmall-SizedCapacitors16-Bump1.
61mmx1.
61mmWLCSP(0.
6mmHeight)16-Lead3.
0mmx3.
0mmUMLP(0.
55mmHeight)ApplicationsLCDBacklightingKeypadBacklightingMobileHandsetsPortableMediaPlayerDescriptionTheFAN5701isahighlyintegratedandefficientcharge-pump-basedmulti-LEDdriver.
ThedevicecandriveuptosixLEDsinparallelwithatotaloutputcurrentof180mA.
TheFAN5701iscapableofdrivingaprimarydisplaybacklightrequiringfourtosixLEDs.
WhenmorethanfourLEDsareneededforbacklighting,theFAN5701'stwoPWMdimminginputscanbeconnectedtogethertoprovidetheproperdimmingcontrolforallsixLEDs.
Whenaprimaryandsub-displayisneeded,theFAN5701canbecontrolledsuchthateachgroupcanbedimmedindependently.
Forcandy-barphonesrequiringaprimarydisplayandkeypadlighting,theFAN5701offersasimple,andcompactlightingsolution.
RegulatedinternalcurrentsinksdeliverexcellentcurrentandbrightnessmatchingtoallsixLEDs.
Thedeviceprovidesexcellentefficiencywithoutaninductorbyoperatingthechargepumpin1.
5xorpass-throughmodes.
TheFAN5701canbeorderedwithISETvaluesof30mA,20mA,15mA,or8mAandavailableinWLCSPorultra-thinUMLPpackagetypes.
ThedefaultISETisalwaysdeterminedbythepartnumberpurchased(seeOrderingInformation).
OrderingInformationPartNumberLEDCurrent(ISET)TemperatureRangePackagePackingFAN5701UC30X30mA-40°Cto85°CWLCSP-16,0.
4mmPitchTapeandReelFAN5701UC20X20mA-40°Cto85°CWLCSP-16,0.
4mmPitchTapeandReelFAN5701UC15X15mA-40°Cto85°CWLCSP-16,0.
4mmPitchTapeandReelFAN5701UC08X8mA-40°Cto85°CWLCSP-16,0.
4mmPitchTapeandReelFAN5701UMP30X30mA-40°Cto85°CUMLP-16,3.
0x3.
0x0.
55mmTapeandReelFAN5701UMP20X20mA-40°Cto85°CUMLP-16,3.
0x3.
0x0.
55mmTapeandReelFAN5701UMP15X15mA-40°Cto85°CUMLP-16,3.
0x3.
0x0.
55mmTapeandReelFAN5701UMP08X8mA-40°Cto85°CUMLP-16,3.
0x3.
0x0.
55mmTapeandReel2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
32FAN5701—Compact6-LEDDriverforMobilePlatformsBlockDiagramFigure1.
TypicalApplication2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
33FAN5701—Compact6-LEDDriverforMobilePlatformsWLCSPPinConfigurationBumpsFacingDownBumpsFacingUpFigure2.
WLCSP-16,0.
4mmPitch,1.
61mmx1.
61mmPinDefinitionsPin#NameDescriptionD2VINInputVoltage.
Connectto2.
7–5.
5VDCinputpowersource.
B4GNDGroundD1VOUTChargePumpOutputVoltage.
ConnecttoLEDAnodes.
D3,D4C1+,C1–C1.
Chargepumpflyingcapacitor#1.
C3,C4C2+,C2–C2.
Chargepumpflyingcapacitor#2.
A1,A2,B1,B2,C1,C2D2A,D1A,D4A,D3A,D6B,D5BLEDOutputsA4ENEnable.
WhenthispinisHIGH,normaloperationisenabled.
WhenLOW,theICisresetandallfunctionsaredisabled.
B3PWMAGroup-APWMDimmingInputA3PWMBGroup-BPWMDimmingInput2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
34FAN5701—Compact6-LEDDriverforMobilePlatformsUMLPPinConfigurationFigure3.
UMLP-16,0.
5mmPitch,3mmx3mm(BottomView)PinDefinitionsPin#NameDescription11VINInputVoltage.
Connectto2.
7–5.
5VDCinputpowersource.
6GNDGround12VOUTChargePumpOutputVoltage.
ConnecttoLEDAnodes.
10,9C1+,C1–C1.
Chargepumpflyingcapacitor#1.
8,7C2+,C2–C2.
Chargepumpflyingcapacitor#2.
1,2,15,16,13,14D2A,D1A,D4A,D3A,D6B,D5BLEDInputs4ENEnable.
WhenthispinisHIGH,normaloperationisenabled.
WhenLOW,theICisresetandallfunctionsaredisabled.
5PWMAGroup-APWMDimmingInput3PWMBGroup-BPWMDimmingInput2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
35FAN5701—Compact6-LEDDriverforMobilePlatformsAbsoluteMaximumRatingsStressesexceedingtheabsolutemaximumratingsmaydamagethedevice.
Thedevicemaynotfunctionorbeoperableabovetherecommendedoperatingconditionsandstressingthepartstotheselevelsisnotrecommended.
Inaddition,extendedexposuretostressesabovetherecommendedoperatingconditionsmayaffectdevicereliability.
Theabsolutemaximumratingsarestressratingsonly.
SymbolParameterMin.
Max.
UnitsVCCVIN,VOUTPins–0.
36.
0VOtherPins(1)–0.
3AVIN+0.
3VESDElectrostaticDischargeProtectionLevelHumanBodyModel,JESD22-A1143kVChargedDeviceModel,JESD22-C101UMLP162ChargedDeviceModel,JESD22-C101WLCSP-161TJJunctionTemperature–40+150°CTSTGStorageTemperature–65+150°CTLLeadSolderingTemperature,10Seconds+260°CNote:1.
LesserofVIN+0.
3or6.
0V.
RecommendedOperatingConditionsTheRecommendedOperatingConditionstabledefinestheconditionsforactualdeviceoperation.
Recommendedoperatingconditionsarespecifiedtoensureoptimalperformancetothedatasheetspecifications.
Fairchilddoesnotrecommendexceedingthemordesigningtoabsolutemaximumratings.
SymbolParameterMin.
Max.
UnitsVINSupplyVoltage2.
75.
5VVLEDLEDForwardVoltage24VTAAmbientTemperature–40+85°CTJJunctionTemperature–40+125°CThermalPropertiesSymbolParameterMin.
Typ.
Max.
UnitsΘJAJunction-to-AmbientThermalResistance(2)WLCSP80°C/WUMLP49°C/WNote:2.
Junction-to-ambientthermalresistanceisafunctionofapplicationandboardlayout.
Thisdataismeasuredwithfour-layer2s2pboardsinaccordancetoJESD51-JEDECstandard.
SpecialattentionmustbepaidnottoexceedjunctiontemperatureTJ(max)atagivenambienttemperateTA.
2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
36FAN5701—Compact6-LEDDriverforMobilePlatformsElectricalSpecificationsUnlessotherwisespecified;VIN=2.
7Vto5.
5V,TA=-40Cto+85C,andEN=VIN.
TypicalvaluesareVIN=3.
6V,TA=25C,ILED=20mA,andLEDcathodeterminals=0.
4V.
CircuitandcomponentsareaccordingtoFigure1.
SymbolParameterConditionsMin.
Typ.
Max.
UnitsPowerSuppliesandThermalProtectionIQQuiescentSupplyCurrent1.
5xMode,NoLEDs4.
4mA1xMode,NoLEDs0.
7mAISDShutdownSupplyCurrentEN=0,VIN=4.
5V,TA=-40Cto+85C1.
54.
0AVUVLOUnder-VoltageLockoutThresholdVINRising2.
552.
70VVINFalling2.
202.
40VUVHYSTUnder-VoltageLockoutHysteresis150mVOVPOver-VoltageProtection6VTLIMITThermalShutdown150°CTHYSTThermalShutdownHysteresis20°CLEDCurrentSinksILEDAbsoluteCurrentAccuracyVCATHODE=0.
4V,SeeOptionsforISET–10%ISET+10%mAILED(MAX)MaximumDiodeCurrent(3)ILED=ISET30mAILED_MATCHLEDCurrentMatching(4)VCATHODE=0.
4V,ILED=ISET0.
43.
0%VDTH1xto1.
5xGainTransitionThresholdLEDCathodeVoltageFalling100mVVHRCurrentSinkHeadroom(5)ILED=90%ILED(NOMINAL)65mVChargePumpROUTOutputResistance1.
5xMode2.
4Ω1xMode0.
9ΩfSWSwitchingFrequency0.
91.
21.
5MHztSTARTStartupTimeVOUT=90%ofSteadyState250sPWMDimmingfPWMPWMDimmingFrequencytON_LED=15s(Minimum)20kHzDPWMPWMDuty-CyclefPWM=100Hz0.
15100.
00%LogicInputs(EN,PWMA,PWMB)VIHHIGH-LevelInputVoltage1.
2VVILLOW-LevelInputVoltage0.
4VVIMAXMaximumInputVoltage1.
85.
5VIINInputBiasCurrentInputTiedtoGNDorVIN0.
011.
00ANotes:3.
ThemaximumtotaloutputcurrentfortheICshouldbelimitedto180mA.
Thetotaloutputcurrentcanbesplitbetweenthetwogroups(IDxA=IDxB=30mAmaximum).
Undermaximumoutputcurrentconditions,specialattentionmustbegiventoinputvoltageandLEDforwardvoltagetoensurepropercurrentregulation.
SeetheMaximumOutputCurrentsectionofthedatasheetformoreinformation.
4.
Forthetwogroupsofcurrentsinksonapart(GroupAandGroupB),thefollowingaredetermined:themaximumsinkcurrentinthegroup(MAX),theminimumsinkcurrentinthegroup(MIN),andtheaveragesinkcurrentofthegroup(AVG).
Foreachgroup,twomatchingnumbersarecalculated:(MAX-AVG)/AVGand(AVG-MIN)/AVG.
Thelargestnumberofthetwo(worstcase)isconsideredthematchingfigureforthegroup.
Thematchingfigureforagivenpartisconsideredtobethehighestmatchingfigureofthetwogroups.
Thetypicalspecificationprovidedisthemostlikelynormofthematchingfigureforallparts.
5.
ForeachDxxpin,headroomvoltageisthevoltageacrosstheinternalcurrentsinkconnectedtothatpin.
VHRx=VOUT-VLED.
Ifheadroomvoltagerequirementisnotmet,LEDcurrentregulationiscompromised.
2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
37FAN5701—Compact6-LEDDriverforMobilePlatformsTypicalCharacteristicsVIN=3.
6V,TA=25C,ILED=20mA,andLEDcathodeterminals=0.
4V.
Figure4.
EfficiencywithLEDCurrentof8mAand20mAFigure5.
LEDCurrentMatchforallSixLEDChannelsatILED=20mAFigure6.
LEDCurrentVariationvs.
TemperatureFigure7.
ShutdownCurrentvs.
InputVoltageFigure8.
SwitchingFrequencyvs.
TemperaturewithLEDCurrentof20mAFigure9.
PWMDimmingVIN=3.
6V,ILEDx=20mA,EN=1kHzwith20%DutyCycle2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
38FAN5701—Compact6-LEDDriverforMobilePlatformsTypicalCharacteristics(Continued)VIN=3.
6V,TA=25C,ILED=20mA,andLEDcathodeterminals=0.
4V.
Figure10.
ModeTransitionfrom1xto1.
5xMode,VIN=3.
6V(VCATHODERampUp)Figure11.
ModeTransitionfrom1.
5xto1xMode,VIN=3.
6V(VCATHODERampDown)Figure12.
LineTransientResponsein1xMode,VIN=3.
6V–4.
2V,ILEDx=20mAFigure13.
LineTransientResponsein1.
5xMode,VIN=2.
7V–3.
3V,ILED=20mAFigure14.
LineTransientfrom1xto1.
5xMode,VIN=3.
2V–4.
1V,ILEDx=20mAFigure15.
Soft-StartwithEN,VIN=3.
6V,ILEDx=20mA2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
39FAN5701—Compact6-LEDDriverforMobilePlatformsCircuitDescriptionTheFAN5701isawhiteLEDdriversystembaseduponanadaptive1.
5x/1xchargepumpcapableofsupplyingupto180mAoftotaloutputcurrent.
ThetightlymatchedcurrentsinksensureuniformbrightnessacrosstheLEDs.
EachLEDisconfiguredinacommonanodeconfigurationwithitspeakdrivecurrentsetduringmanufacturing(seeOrderingInformationandISET).
ChargePumpThechargepumpoperatesineither1xmode,whereVOUTisconnectedtoVINthroughabypassswitch,orin1.
5xmode.
Thecircuitoperatesin1xmodeuntiltheLEDwiththehighestforwardvoltage(VLED(MAX))cannolongermaintaincurrentregulation.
Atthatpoint,1.
5xmodebegins.
Ifthelowestactivecathodevoltageisgreaterthan1.
8V,thechargepumpswitchesbackto1xmode.
Inadditiontohysteresis,a1mstransitiondelayisprovidedforthedevicetoignoreshort-durationinputvoltagedropsindecidingmodetransitions.
ICEnableWhentheENpinisLOW,allcircuitfunctionsaredisabled.
WhentheENpinHIGH,theentirechipisenabled.
BothPWMinputsarenowfunctional.
PWMDimmingExternalPWMinputs(groupAandgroupB)directlymodulateoutputcurrentsintheircorrespondingLEDchannelstovarytheperceivedLEDbrightness.
TwoPWMinputsareprovidedtocontroltwoindependentgroupsofLEDs,suchasthatofamaindisplaypanelandasecondarypanel.
TheycanalsobeconnectedtoasingleinputtosimultaneouslydimallsixLEDoutputs.
VOUTShort-CircuitProtectionTheFAN5701hasintegratedprotectioncircuitrytopreventthedevicefrombeingshortcircuitedwhentheoutputvoltagefallsbelow2V.
IfthisoccursFAN5701turnsoffthechargepumpandtheLEDdriveroutputs,butasmallbypassswitchislefton.
Thedevicemonitorstheoutputvoltagetodetermineifitisstillinshortcircuitconditionand,onceithaspassed,FAN5701soft-startsandreturnstonormaloperation.
VOUTOver-VoltageProtectionIftheoutputvoltagegoesabove6V,theFAN5701shutsdownuntilthisconditionhaspassed.
ThechargepumpandLEDdriveroutputsareturnedoff.
Oncethisconditionhaspassed,FAN5701soft-startsintonormaloperation.
2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
310FAN5701—Compact6-LEDDriverforMobilePlatformsPhysicalDimensionsFigure16.
Wafer-LevelChip-ScalePackage(WLCSP)Product-SpecificDimensionsProductDEXYFAN5701UCxx1.
610mm1.
610mm0.
205mm0.
205mmPackagedrawingsareprovidedasaservicetocustomersconsideringFairchildcomponents.
Drawingsmaychangeinanymannerwithoutnotice.
Pleasenotetherevisionand/ordateonthedrawingandcontactaFairchildSemiconductorrepresentativetoverifyorobtainthemostrecentrevision.
PackagespecificationsdonotexpandthetermsofFairchild'sworldwidetermsandconditions,specificallythewarrantytherein,whichcoversFairchildproducts.
AlwaysvisitFairchildSemiconductor'sonlinepackagingareaforthemostrecentpackagedrawings:http://www.
fairchildsemi.
com/packaging/.
2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
311FAN5701—Compact6-LEDDriverforMobilePlatformsPhysicalDimensions(Continued)Figure17.
UMLP-16DimensionsPackagedrawingsareprovidedasaservicetocustomersconsideringFairchildcomponents.
Drawingsmaychangeinanymannerwithoutnotice.
Pleasenotetherevisionand/ordateonthedrawingandcontactaFairchildSemiconductorrepresentativetoverifyorobtainthemostrecentrevision.
PackagespecificationsdonotexpandthetermsofFairchild'sworldwidetermsandconditions,specificallythewarrantytherein,whichcoversFairchildproducts.
AlwaysvisitFairchildSemiconductor'sonlinepackagingareaforthemostrecentpackagedrawings:http://www.
fairchildsemi.
com/packaging/.
2009FairchildSemiconductorCorporationwww.
fairchildsemi.
comFAN5701Rev.
1.
0.
312FAN5701—Compact6-LEDDriverforMobilePlatformsMouserElectronicsAuthorizedDistributorClicktoViewPricing,Inventory,Delivery&LifecycleInformation:FairchildSemiconductor:FAN5701UMP15XFAN5701UC15XFAN5701UC08XFAN5701UMP08XFAN5701UC20XFAN5701UC30XFAN5701UMP20XFAN5701UMP30X