TX5122 高效能1.2MHz 30V 升压LED驱动器 SOT23 深圳恒锐丰科技.pdf

TX5122HighEfficiency

1.2MHz30VBOOSTLEDDriver

Features

2.5Vto5.5VInputVoltageInternalCompensation

Driversupto7SeriesWLEDsThermalShutdown

Low250mVFeedbackVoltageOverVoltageProtection

1.2MHzFixedSwitchingFrequencyDimmingwithwideFrequencyRange

Internal1.6ASwitchCurrentLimitAvailableina6-pinSOT-23package

Applications

CameraFlashWhiteLEDDigitalstillcameras

PDALEDbacklight

GeneralDescription

TheTX5122isastep-upconverterdesignedfordrivingrequirementofsmallLCfiltersvalueandlowoperation

upto7serieswhiteLEDsfromasinglecellLithiumIoncurrentwithhighefficiency.Internalsoftstartfunction

battery.Itslow250mVfeedbackvoltagereducespowercanreducetheinrushcurrent.Tinypackagetype

lossandimprovesefficiency.providesthebestsolutionforPCBspacesavingand

OptimizedoperationfrequencycanmeetthetotalBOMcost.

TypicalApplication

Figure1.BasicApplicationCircuit

Ver1.1Feb24,2016Page1

TX5122HighEfficiency

1.2MHz30VBOOSTLEDDriver

PinDescription

PINNAMEFUNCTION

PowerSwitchOutput.LXisthedrainoftheinternalMOSFETswitch.

1LXConnectthepowerinductorandoutputrectifiertoLX.LXcanswing