ncp5424 笔记本常有芯片电路图

SemiconductorComponentsIndustries,LLC,2003June,2003-Rev.31PublicationOrderNumber:NCP5424/DNCP5424DualSynchronousBuckControllerwithInputCurrentSharingTheNCP5424isaflexibledualN-channelsynchronousbuckcontrollerutilizingV2controlforfasttransientresponseandexcellentlineandloadregulation.Thishighlyversatilecontrollercanbeconfiguredasasingletwophaseoutputconverterthatdrawsprogrammableamountsofcurrentfromtwodifferentinputvoltagesorallcurrentfromonesupply.TheNCP5424canalsobeconfiguredastwoindependentout-of-phasecontrollers.UsingtheNCP5424inacurrentsharinginputconfigurationisidealforapplicationswheremorepowerisrequiredthanisavailablefromonesupply,suchasvideocardsorotherplug-inboards.Whenconfiguredasadualoutputcontroller,theoutputofonecontrollercanbedivideddownandusedasthereferenceforthesecondcontroller.ThistrackingcapabilityisusefulinapplicationssuchasDoubleDataRate(DDR)MemorypowerwheretheterminationvoltagemusttrackVDD.TheNCP5424providesacycle-to-cyclecurrentlimitonController2allowingthesystemtohandletransientovercurrenteventsandahiccupmodeovercurrentprotectiononController1allowinglosslessshortcircuitprotection.Inaddition,theNCP5424providesSoftStart,undervoltagelockout,andbuilt-inadaptiveFETnonoverlaptimetopreventshootthrough.Features•HiccupModeCurrentLimit(Controller1)•Cycle-to-CycleCurrentLimit(Controller2)•ProgrammableSoftStart•100%DutyCycleforEnhancedTransientResponse•150kHzto600kHzProgrammableFrequencyOperation•SwitchingFrequencySetbySingleResistor•Out-Of-PhaseSynchronizationBetweentheChannelsReducestheInputFilterRequirement•UndervoltageLockoutApplications•VideoGraphicsCard•DDRMemory•HighCurrent(Two-Phase)PowerSupplies•DualOutputDC-DCConvertersNCP5424DR2A=AssemblyLocationWL=WaferLotY=YearWW=WorkWeekDevicePackageShippingORDERINGINFORMATIONNCP5424DSO-1648Units/RailSO-162500Tape&ReelVFB1COMP1IS+1GATE(H)1PINCONNECTIONSANDMARKINGDIAGRAMGATE(L)1GNDBSTIS-SO-16DSUFFIXCASE751B116GATE(H)2GATE(L)2VCCROSCIS+2VFB+2VFB-2COMP2AWLYWWNCP5424161μFL21.3μH/15AGATE(H)1GATE(L)1GATE(H)2GATE(L)2NCP5424VCCBSTGNDQ3Q4IS+1IS-COMP1VFB1IS+2VFB+2COMP2VFB-2ROSCMTD60N03MTD90N02+C3/4/5680μF/4VR55k±1%C8.22μFR610k±1%C140.1μFC130.01μFR1230.9kQ1Q2MTD60N03MTD90N02L11.3μH/15A+C19/20/21680μF/4V12VU1++C17220μFC18220μF3.3VR3xk±1%R4xk±1%R2xkR1xkC60.1μF+C2220μFC1220μFR174k5.0V+1.5V@20ANCP5424*RatingValueUnitOperatingJunctionTemperature,TJ150°CStorageTemperatureRange,TS-65to+150°CESDSusceptibility(HumanBodyModel)2.0kVPackageThermalResistance,SO-16:Junction-to-Case,RθJCJunction-to-Ambient,RθJA28115°C/W°C/WLeadTemperatureSoldering:Reflow:(SMDstylesonly)(Note1)230peak°C1.60secondmaximumabove183°C.*Themaximumpackagepowerdissipationmustbeobserved.MAXIMUMRATINGSPinSymbolPinNameVMAXVMINISOURCEISINKVCCICPowerInput16V-0.3VN/A1.5Apeak200mADCCOMP1,COMP2CompensationCapacitorforChannel1or24.0V-0.3V1.0mA3.5mAVFB1,VFB+2,VFB-2VoltageFeedbackInputforChannel1or25.0V-0.3V1.0mA1.0mABSTPowerInputforGATE(H)1,220V-0.3VN/A1.5Apeak200mADCROSCOscillatorResistor4.0V-0.3V1.0mA1.0mAGATE(H)1,GATE(H)2High-SideFETDriverforChannel1or220V-0.3V1.5Apeak200mADC1.5Apeak200mADCGATE(L)1,GATE(L)2Low-SideFETDriverforChannel1or216V-0.3V1.5Apeak200mADC1.5Apeak200mADCGNDGround0V0V1.5Apeak200mADCN/AIS+1,IS+2PositiveCurrentSenseforChannel1or26.0V-0.3V1.0mA1.0mAIS-NegativeCurrentSenseforChannels1and26.0V-0.3V1.0mA1.0mANCP5424(0°CTA70°C;0°CTJ125°C;ROSC=30.9k,CCOMP1,2=0.1μF,10.8VVCC13.2V;10.8VBST20V,CGATE(H)1,2=CGATE(L)1,2=1.0nF,VFB+2=1.0V;unlessotherwisespecified.)CharacteristicTestConditionsMinTypMaxUnitErrorAmplifierVFBBiasCurrentVFBX=0V-0.51.6μAVFB1(2)InputRangeNote20-1.1VCOMP1,2SourceCurrentCOMP1,2=1.2Vto2.5V;VFB1(-2)=0.8V153060μACOMP1,2SinkCurrentCOMP1,2=1.2V;VFB1(-2)=1.2V153060μAReferenceVoltage1(2)COMP1=VFB1;COMP2=VFB-20.9801.0001.020VCOMP1,2MaxVoltageVFB1(-2)=0.8V3.03.3-VCOMP1,2MinVoltageVFB1(-2)=1.2V-0.250.35VOpenLoopGain--95-dBUnityGainBandWidth--40-kHzPSRR@1.0kHz--70-dBTransconductance--32-mmhoOutputImpedance--2.5-MΩInputOffset,ErrorAmp.2--3.003.0mVErrorAmp.2CommonModeRangeNote21.752.0-VGATE(H)andGATE(L)HighVoltage(AC)Measure:VCC-GATE(L)1,2;BST-GATE(H)1,2;Note2-00.5VLowVoltage(AC)Measure:GATE(L)1,2orGATE(H)1,2;Note2-00.5VRiseTime1.0VGATE(L)1,2VCC-1.0V1.0VGATE(H)1,2BST-1.0V,BST≤14V-2050nsFallTimeVCC-1.0GATE(L)1,21.0VBST-1.0GATE(H)1,21.0V,BST≤14V-1550nsGATE(H)toGATE(L)DelayGATE(H)1,22.0V,GATE(L)1,22.0VBST≤14V204070nsGATE(L)toGATE(H)DelayGATE(L)1,22.0V,GATE(H)1,22.0V;BST≤14V204070nsGATE(H)1(2)andGATE(L)1(2)pull-down.ResistancetoGNDNote250125280kΩPWMComparatorPWMComparatorOffsetVFB1(-2)=0V;IncreaseCOMP1,2untilGATE(H)1,2startsswitching0.300.400.50VArtificialRampDutycycle=50%,Note260105150mVMinimumPulseWidthNote2--300ns2.Guaranteedbydesign,not100%testedinproduction.NCP5424(continued)(0°CTA70°C;0°CTJ125°C;ROSC=30.9k,CCOMP1,2=0.1μF,10.8VVCC13.2V;1