SGM3780-REV.A_20130820

SGM37802MHz,1.5AFlashLEDDriverinTDFN-3×2-14LPackageGENERALDESCRIPTIONTheSGM3780istheidealpowersolutionforhigh-powerflashLEDsusedwithcellphonecameramodulesordigitalstillcameras.Itisahighlyintegratedstep-upDC/DCconverterwithveryhighswitchingfrequency,fixedat2MHz,providingaverysmalltotalsolutionforportablephotoflash.TheSGM3780hasseparateFlashmodeandMovie/Torchmodeenablepinsformaximumflexibility.Flashmodeisusuallyusedwith660mstimercontroltogenerateahighintensityflash.TheFlashmodeandMovie/TorchmodeLEDcurrentisprogrammedbyexternalresistorsrespectively,makingtheflashLEDsolutionsimpletocontrol.Ifbothenablepinsareatlogichigh,theLEDcurrentwillbeprogrammedbytheMovie/Torchmodesettingresistor.ThetwoLEDoutputsinkscanbeshortedtogetherexternallyforhigherpowersingleflashLEDs,upto1.5AcontinuousLEDcurrent.ThermalregulationisintegratedinFlashmodetolimittheIC’stemperatureandcontinuouslyprovidethemaximumallowedoutputcurrent.VariousprotectionfeaturesarebuiltintotheSGM3780,includingcycle-by-cycleinputcurrentlimitprotection,outputover-voltageprotection,LEDfault(openorshort)protectionandthermalshutdownprotection.Theleakagecurrentinshutdownislessthan1μA.TheSGM3780isavailableinGreenTDFN-3×2-14Lpackage.Itoperatesoveranambienttemperaturerangeof-40℃to+85℃.FEATURES●InputVoltageRange:3Vto5V●DualFlashLEDOutputs●DriveUptoTotal1.5Aor0.75AperChannel●HighEfficiencyLEDDriver(Upto90%)●2MHzStep-UpConverter●VerySmallInductor:1.0μH●IndependentFlashModeEnableandMovie/TorchModeEnablePins●Movie/TorchModeDimmingviaPWMControl●OneResistorSetsFlashModeLEDCurrent●OneResistorSetsMovie/TorchModeLEDCurrent●IntegratedThermalRegulationControl●660msFlashTimerControl●330kΩPull-DownResistoronENMorENFPin●LEDOpenorShortProtection●OutputOver-VoltageProtection●Cycle-by-CycleInductorCurrentLimit●Lessthan1μAShutdownCurrent●AvailableinGreenTDFN-3×2-14LPackage●TemperatureRange:-40℃to+85℃APPLICATIONSPortableEquipmentsSGMicroCorp×2-14LPackage2SGM3780SGMicroCorp×2-14L-40℃to+85℃3780DPXXXXXTapeandReel,3000NOTE:XXXXX=DateCodeandVendorCode.ABSOLUTEMAXIMUMRATINGSVIN,VOUT,D1andD2Voltages.............................-0.3Vto6VENF,ENM,RSETF,RSETM........................-0.3VtoVIN+0.3VSWVoltage............................................................-0.3Vto6.5VStorageTemperatureRange..............................-65℃to+150℃JunctionTemperature........................................................150℃OperatingTemperatureRange............................-40℃to+85℃LeadTemperature(Soldering10sec)..........................................................................................260℃ESDSusceptibilityHBM..................................................................................2000VMM......................................................................................200VNOTE:Stressesbeyondthoselistedunder“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectdevicereliability.CAUTIONThisintegratedcircuitcanbedamagedbyESDifyoudon’tpayattentiontoESDprotection.SGMICROrecommendsthatallintegratedcircuitsbehandledwithappropriateprecautions.Failuretoobserveproperhandlingandinstallationprocedurescancausedamage.ESDdamagecanrangefromsubtleperformancedegradationtocompletedevicefailure.Precisionintegratedcircuitsmaybemoresusceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications.SGMICROreservestherighttomakeanychangeincircuitdesign,specificationorotherrelatedthingsifnecessarywithoutnoticeatanytime.PleasecontactSGMICROsalesofficetogetthelatestdatasheet.2MHz,1.5AFlashLEDDriverinTDFN-3×2-14LPackage3SGM3780SGMicroCorp(TOPVIEW)1412131110981324567AGNDTDFN-3×2-14LRSETMRSETFAGNDVINSWSWPGNDD2AGNDD1ENMENFVOUTVOUTPINDESCRIPTIONPINNAMEFUNCTION1RSETMMovie/TorchModeCurrentSettingPin.2RSETFFlashModeCurrentSettingPin.3,13AGNDAnalogGroundPin.4VINInputSupplyPinfortheIC.5,6SWSwitchingNodeoftheStep-UpConverter.7PGNDPowerGroundPin.8,9VOUTOutputVoltagePin.10ENFFlashModeEnablePin.Thispinhasaninternal330kΩpull-downresistortoAGND.11ENMMovie/TorchModeEnablePin.Thispinhasaninternal330kΩpull-downresistortoAGND.12D1RegulatedOutputCurrentSink1.Upto0.75Acurrent.D1andD2pinscanbeconnectedtogethertosink1.5Acombined.14D2RegulatedOutputCurrentSink2.Upto0.75Acurrent.D1andD2pinscanbeconnectedtogethertosink1.5Acombined.ExposedPadAGNDExposedPad.Connectedtogroundforelectricalandthermalusage.Exposedpadisinternallyconnectedtoanaloggroundpin.2MHz,1.5AFlashLEDDriverinTDFN-3×2-14LPackage4SGM3780SGMicroCorp(VIN=VEN=3.6V,TA=25℃,unlessotherwisespecified.)PARAMETERSYMBOLCOND