GeneralDescriptionTheKX3019isaninductor-basedDC/DCconverterdesignedtodriveuptofivewhiteLEDsinseriesforbacklight.OnlyonefeedbackresistorisneededtocontroltheLEDcurrentandobtainrequiredbrightness.Aconstantfrequency1.0MHzPWMcontrolschemeisemployedinthisIC,whichmeanstinyexternalcomponentscanbeused.Infact,1mmtallinductorand0.22 Foutputcapacitorforatypicalapplicationissufficient.Additionally,theschottkydiodeinboostcircuitisintegratedonthischip.KX3019alsoprovidesadisablepintoeaseitsusefordifferentsystems.TheoveroutputvoltageprotectionisequippedinKX3019.WhenanyLEDisbrokenorinotherabnormalconditions,theoutputvoltagewillbeclamped.TheKX3019isavailableinstandardSOT-23-6andTSOT-23-6packages.Features InherentlyUniformLEDCurrent HighEfficiencyupto84% NoNeedforExternalSchottkyDiode OverOutputVoltageProtection Fast1.0MHzSwitchingFrequency UsesTiny1mmTallInductor RequiresOnly0.22 FOutputCapacitorApplications CellularPhones DigitalCameras LCDmodules GPSReceivers PDAs,HandheldComputerswww.szkxw.com