RY7312 30V 1.2A 降压可调光LED驱动器 SOT89-5 深圳恒锐丰科技.pdf

RY7312

30V1.2AStep-DownDimmableLEDDriver

Features

•Wide7.5Vto30VOperatingInputRange•400mΩLowRDS(ON)InternalPowerMOSFETs

•1.2AContinuousOutputCurrent•Highefficiency(upto97%)

•Maximum1MHzSwitchingFrequency•AdjustableConstantLEDcurrent

•OverTemperatureProtection•PWMandAnalogDimming

•InherentOpen-CircuitLEDProtection•Typical6%OutputCurrentAccuracy

•High-sideCurrentSense•AvailableinSOT89-5Package

•HystereticControl:NoCompensation•-40°Cto+85°CTemperatureRange

Applications

•LowvoltagehalogenreplacementLEDs•Signs/EmergencyLighting

•Automotive/DecorativeLEDLighting•LEDBacklighting

•Low-VoltageHalogenReplacement•SELVLighting

GeneralDescription

TheRY7312isstep-downregulatorfordimmableLEDdriver,whichisdesignedincontinuouscurrentmodefor

drivingthehigh-brightnessLEDsfromawideinputvoltageof7.5Vto30V.TheRY7312employsahysteretic

controlschemetoregulateLEDcurrent.Moreover,thecontrolschemeprovidesoptimalloopstabilizationanda

veryquickresponsetime.TheRY7312implementsPWMandanalogdimmingtogetherontheEN/DIMpin.The

RY7312includesunder-voltagelockoutandthermaloverloadprotectiontopreventdamageintheeventofanoutput

overload.

TheRY7312requiresaminimalnumberofreadilyavailable,externalcomponentsandisavailableinaspacesaving

SOT89-5package.

TypicalApplicationCircuit

D1

VIN6V-3