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LM5021-Q1

SNVSA90–DECEMBER2014

LM5021-Q1AC-DCCurrent-ModePWMController

1Features2Applications

1

•QualifiedforAutomotiveApplications

•DCM/CCMFlybackConverters

•AEC-Q100QualifiedWiththeFollowingResults:•IndustrialPowerConversion

•SMPSforSmartMetersandAudioAmplifiers

–DeviceTemperatureGrade1:–40°Cto125°C

AmbientOperatingTemperatureRange

•BuildingAutomationandWhiteGoodsSMPS

–DeviceHBMClassificationLevel2:±2kV

•IsolatedTelecomPowerSupplies

–DeviceCDMClassificationLevelC4B:750V

3Description

•Ultra-lowStartupCurrent(25µAMaximum)

TheLM5021off-linepulsewidthmodulation(PWM)

•CurrentModeControl

controllercontainsallofthefeaturesneededto

•SkipCycleModeforLowStandbyPower

implementhighlyefficientoff-linesingle-ended

•SingleResistorProgrammableOscillator

flybackandforwardpowerconvertersusingcurrent-

modecontrol.TheLM5021featuresincludeanultra-

•SynchronizableOscillator

low(25µA)start-upcurrent,whichminimizespower

•AdjustableSoft-Start

lossesinthehighvoltagestart-upnetwork.Askip

•Integrated0.7-APeakGateDriver

cyclemodereducespowerconsumptionwithlight

loadsforenergyconservingapplications(ENERGY

•DirectOpto-CouplerInterface

STAR®,CECP,andsoforth).Additionalfeatures

•MaximumDutyCycleLimiting(80%forLM5021-1

includeunder-voltagelockout,cycle-by-cyclecurrent

or50%forLM5021-2)

limit,hiccupmodeoverloadprotection,slope

•SlopeCompensation(LM5021-1Only)

compensation,soft-startandoscillator

synchronizationcapability.Thishighperformance8-

•UndervoltageLockout(UVLO)withHysteresis

pinIChastotalpropagationdelayslessthan100ns

•Cycle-by-CycleOvercurrentProtection

anda1-MHzcapableoscillatorthatisprogrammed

•HiccupModeforContinuousOverloadProtection

withasingleresistor.

•LeadingEdgeBlankingofCurrentSenseSignal

DeviceInformation

(1)

•Package:VSSOP-8

PARTNUMBERPACKAGEBODYSIZE(NOM)

LM5021-Q1VSSOP(8)3.00mm×3.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

SimplifiedApplicationDiagram

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Product specificaties