RY7609 高性能恒流LED驱动器带PWM亮度控制 SSOP10 深圳恒锐丰科技.pdf
RY7609
HighPerformance,ConstantCurrentLEDDriver
withPWMBrightnessControl
Features
•4.5Vto65VInputVoltage•SupportsAll-CeramicOutputCapacitorsand
•2Ω,1APeakMOSFETGateDriveCapacitor-lessOutputs
•Differential,High-SideCurrentSense•Low-PowerShutdownandThermalShutdown
•Cycle-by-CycleCurrentLimit•ThermallyEnhanced10-Pin,SSOP10Package
•NoControlLoopCompensationRequired
Applications
•LEDDriver•ConstantCurrentSource
•AutomotiveLighting•GeneralIllumination
GeneralDescription
RY7609isaP-channelMOSFET(PFET)controllerforbuckcurrentregulators.Theyfeatureawideinputvoltage
range,high-enddifferentialcurrentdetection,lowadjustablethresholdvoltageandfastoutputenable/disableand
heat-resistantenhanced10-pinSSOP10package.Itacceptsaninputvoltageof4.5vto65vandprovidesanaverage
LEDcurrentofupto1Awitha3%accuracy.The7609usesconstantoff-time(COFT)controltoregulatetheexact
constantcurrentwithoutexternalcontrolloopcompensation.AnalogandPWMdimmingareeasytoimplementand
canachieveahighlineardimmingrangewithexcellentcontrast.ProgrammableUVLO,lowpowershutdownand
hotshutdownfeaturescompletethefeatureset.
TypicalApplicationCircuit
RUV2
RUV1
110
UVLOVINVIN