iW671 Datasheet Controlled 20150615

iW671DigitalGreen-ModeSynchronousRectifierControllerRev.0.5PreliminaryiW671©2015DialogSemiconductor(UK)Ltd.Datasheet1of191.0Features●Digitaladaptiveturn-offcontrolminimizesdeadtimeandeliminatestheparallelSchottkydiode●Integratedpulselinearregulator(PLR)allowsSRoperationatlowsystemoutputvoltagedownto2Vintypical5V,2.5AUSBchargerapplications●Wideinputoperatingvoltageupto30V●Optimized5VMOSFETgatedriver●Intelligentlowpowermanagementachievesultra-lowno-loadoperatingcurrent0.65mA●LosslessMOSFETVDSsensingforSRtimingcontrol●Integratedadaptivevoltagepositionmonitorforfastflybackoutputvoltageundershootdetection●8-pinSOICand8-pinMSOPpackages2.0DescriptionTheiW671isahighperformancesynchronousrectifiercontrollerwithanintegratedMOSFETdriverforflybackconvertersoperatingatdiscontinuousconductionmode.CombinedwiththeMOSFET,theiW671canemulatethedioderectifieratthesecondarysideoftheflybacktoreduceconductionloss.TheiW671determinesthetimingofthedriverbysensingthevoltageacrosstheRDS(ON)toachievelosslesssensing.TheiW671usesproprietarydigitaladaptiveturn-offcontroltechnologytominimizetheturn-offdeadtimeofthesynchronousrectifiersothattheparallelSchottkydioderequiredbyconventionalsynchronousrectifierscanbeeliminated.Theintegrateddriverhasstrongdrivingcapabilityforhighefficiency.Theoperatingpowerconsumptionofthecontrollerexcludingthedriverislessthan4mWatnoloadtoachievetheultra-lowno-loadpowerconsumptionfor5Vapplications.TheiW671integratesapulselinearregulatortomaintaintheoperationofthesynchronousrectifieratlowsystemoutputvoltagewhenthesystemisoperatinginconstantcurrent(CC)mode.TheiW671alsointegratestheadaptivevoltagepositionmonitortodetecttheflybackconverteroutputvoltageundershoot,enablingfasterrecoveryfromstandby.Dialog’siW1786andiW1787primary-sidecontrollersareoptimizedtoworkwiththeiW671forverylowoutputripple,fastdynamicloadresponse(DLR),andverylowno-loadpowerconsumption(15mW)at230VACinputinatypical5V,2.5Apowersupply.3.0Applications●CompactAC/DCadapters/chargersformediatabletsandsmartphonesFigure3.1:iW671TypicalApplicationCircuitVOUTRTNVPSDRVVINVCC12387645PLRINDRAIN++GNDOUTiW671iW671DigitalGreen-ModeSynchronousRectifierControllerRev.0.5PreliminaryiW671©2015DialogSemiconductor(UK)Ltd.Datasheet2of19++U1iW1786VSENSESDVCCGND12387645NTCLNOUTPUTCS/CDCDETASURCDCVOUTRTNVPSDRVVINVCC12387645PLRINDRAIN++GNDOUTU2iW671Figure3.2:iW671TypicalApplicationCircuit(UsingiW1786asPrimary-SideController)(Achieving15mWNo-LoadPowerConsumptionin5V,2.5AAdapterDesignswithFastDynamicLoadResponse,andSupportingConstantCurrentOperationdownto2VSystemOutput)++U1iW1787VSENSESDVCCGND12387645NTCLNOUTPUTCS/CDCDETASURCDCVOUTRTNVPSDRVVINVCC12387645PLRINDRAIN++GNDOUTU2iW671Figure3.3:iW671TypicalApplicationCircuitfor12V-OutputApplication(UsingiW1787asPrimary-SideSensingFlybackControllerwiththePLRINPinFloating)iW671DigitalGreen-ModeSynchronousRectifierControllerRev.0.5PreliminaryiW671©2015DialogSemiconductor(UK)Ltd.Datasheet3of19Figure3.4:iW671TypicalApplicationCircuitforMulti-LevelOutputVoltageandCurrent(UsingiW1780asPrimaryControllerandiW626asSecondary-sideControllerforQC2.0,achieving20mWNo-LoadPowerConsumption.)Note:TheDRAINandPLRINpinsmayneedexternalclampingcircuits.PleaserefertoSection9.6fordetails.++U1iW1780VSENSESDVCCGND12387645NTCLNOUTPUTCS/CDCDLNKASURCDCVOUTRTNVPSDRVVINVCC12387645PLRINDRAIN++GNDOUTU3iW671U2iW62631DRVGND2465DISVCCD-D+D+D-iW671DigitalGreen-ModeSynchronousRectifierControllerRev.0.5PreliminaryiW671©2015DialogSemiconductor(UK)Ltd.Datasheet4of194.0PinoutDescriptionPin#NameTypePinDescription1VPSAnalogInputVoltagepositionsense.Powersupplyoutputvoltageinformationtobecomparedwiththeinternalreferencevoltage.2DRVAnalogOutputExternalcircuitdrive.Itdrivesanexternalcircuitsuchastheopto-couplerLED.3PLRINPowerInputPulselinearregulator(PLR)input.Connectthispinthroughadiode(cathodetothepin)tothedrainofthesynchronousrectifierMOSFET.4DRAINAnalogInputSynchronousrectifierMOSFETdrainvoltagesensing.5OUTOutputSynchronousrectifierMOSFETdriver.6GNDGroundGround.7VCCPowerInputOutputofinternalLDOandPLR.ItprovidesbiasvoltagefortheinternallogiccircuitandtheMOSFETdriver.Connectthispintoacapacitor.8VINPowerInputConnecttoadapter/chargeroutputforbiasvoltage.TheinternalLDOclampstheVCCvoltageat5VwhenVIN5V.TheVINisalsotheinputforthePLRenablecomparatorandtheSRenablecomparator.Figure4.1:8-PinSOIC/MSOPPackageiW671VPSDRVPLRINDRAINVINVCCGNDOUT12387645iW671DigitalGreen-ModeSynchronousRectifierControllerRev.0.5PreliminaryiW671©2015DialogSemiconductor(UK)Ltd.Datasheet5of19ParameterSymbolValueUnitsVINDCsupplyvoltagerange(pin8,ICC=15mAmax)VIN-0.3to33VContinuousDCsupplycurrentatVINpin(VIN=30V)IVO15mAContinuousDCsupplycurrentatVCCpin(VCC=5.5V)IVCC15mAGatepeakoutputcurrentIG±3ADRAINpinvoltageVD-1.5to60VPLRINpinvoltageVPLRIN-1.5to60VPLRINpeakinputcurrentIPLRIN_LR500mAVCCpinvoltageVCC6VDRVpinvoltage-0.3to33VDRVpincurrentrange(continuous)15mAVPSpinvoltage-0.3toVCCVVPSpincurrentrating1mAJunctiontemperatureTJ-40to150°CStoragetemperature–65to150°CThermalResistanceJunction-to-Ambient(SOIC-8package)θJA_SO