RY3730 高性能恒流LED驱动器带PWM亮度控制 SOT23-6 深圳恒锐丰科技.pdf
RY3730
HighPerformance,ConstantCurrentLEDDriver
withPWMBrightnessControl
Features
•2.5Vto5.5VInputVoltage•InternalCompensation
•Driversupto8SeriesWLEDs•ThermalShutdown
•Low250mVFeedbackVoltage•OverVoltageProtection
•1.2MHzFixedSwitchingFrequency•DimmingwithwideFrequencyRange
•Internal1.6ASwitchCurrentLimit•AvailableinSOT23-6package
Applications
•CameraFlashWhiteLED•PDALEDbacklight
•Digitalstillcameras
GeneralDescription
TheRY3730isastep-upconverterdesignedfordrivingupto8SerieswhiteLEDsfromasinglecellLithiumIon
battery.ThedevicefeaturesintegratedovervoltageprotectionandItslow250mVfeedbackvoltagereducespower
lossandimprovesefficiency.
OptimizedoperationfrequencycanmeettherequirementofsmallLCfiltersvalueandlowoperationcurrentwith
highefficiency.Internalsoftstartfunctioncanreducetheinrushcurrent.SOT23-6packagetypeprovidesthebest
solutionforPCBspacesavingandtotalBOMcost.
TypicalApplicationCircuit
VINL1D1VOUT
n·WLED
VINSW
COUT
OVP
Dimming
CINCTRLFB