Features
FlybackLEDDriver
CritICal-conduction/Transitionmodeoperation
Primaryconstantpowercontrol
Burstmodeoperationatlightload
Over-currentprotection
Micropowerstartup(150?A)
Lowquiescentcurrent(2.5mA)
LatchimmunityandESDprotection
Openloadovervoltageprotection
Noiseimmunity
TypicalApplications
LEDDrivers
TheIRS2983isafullyintegrated,fullyprotectedSMPScontrolICdesignedtodriveFlybackconverterLEDdrivers.TheIRS2983featuresincludeprimarysidepowerregulation,whichallowsabasicconvertertobeimplementedwithouttheneedforanoptoisolatorinaFlybackLEDdriverwithafixedloadenablingalowcost,highreliabilityisolatedLEDdriverdesigntoberealized.TheIRS2983mayalsobeusedinconvertersthatdoincludesecondaryfeedbackthroughanoptoisolator.OtherfeaturesoftheIRS2983includeahighvoltagestartupenablingVCCsupplytobederivedinitiallyfromthehighvoltageDCbusuntiltheauxiliaryinductorwindingisabletotakeover.TheIRS2983operatesincriticalconduction(CrCM)ordiscontinuous(DCM)modesandisfullyprotectedagainstopenandshortcircuitaswellasinductorsaturation.TheIRS2983maybeusedinsinglestageFlybackLEDdriverswithanunsmoothedDCbustoobtainhighpowerfactorandlowTHD.