标签: dimming

简单介绍了键盘和LED功能NXPLEDdimmerdemonstrationboardOM6279QuicklydemonstratekeypadandLEDfunctionsThiseasy-to-use,two-boardset-uprunsonitsown,withoutadditionalhardwareorsoftware,andmakesitsimpletodemonstrateawiderangeofkeypadandLEDfunctions.KeyfeaturesTheNXPLEDdimmerdemoboardTwo-boardset-up4VersatileLEDdimmermakesitquickandeasytodemonstrateThedemoboardusestwoboards,onedemonstrationskeypadcontrolaswellasLEDlightingforkeypadcontrol,ando……

恩智浦超高亮度的RGBALED调光参考设计，提供合适的低成本指导NXPUltra-highbrightnessRGBALEDreferencedesignwithdimmingInherentsystemexibilityforsolid-statelightingNXP’sultra-highbrightnessRGBALEDdrivingreferencedesignwithdimmingputsexible,low-costsystemsatyourngertips.It’safullytestedsolutionbasedonrobustcomponentsandproventechnologiesthatsimpliesthedesignofsolid-statelighting(SSL)luminaires.KeybenetsOurultra-highbrightnessRGBALEDdrivingreferencedesignFastcreationandevaluationoflow-costsolutionsisidealforahostofSSLapplications.ItincludesmultipleHighsystemexi……

用于动娱乐和建筑照明的混色的RGBLED驱动NXPI2CRGBLEDdimmersPCA963xColor-mixingHeadlineRGBLEDdriversformobile,entertainment,andarchitecturallightingSeteachLEDtoaspecificbrightnessanddimorblinkallofthemwiththesamevalue.SpecialsoftwarefeaturesoptimizeI2C-buscommandsinmulti-LEDcontrolapplications.KeyfeaturesApplications425-mA(max)LEDdrivers4RGBandRGBALEDdrivers48-pinversion:fixedI2C-busaddress……

用GPIO扩展LED调光NXP2/4/8/16-bitI2C/SMBusLEDdimmersPCA9530/31/32/33LEDdimmingwithGPIOexpansionTheseI2C/SMBus-compatibleGPIOexpanders,optimizedfordimmingLEDs,supporttwouser-programmableblinkanddimmingrates,programmableupto256levelsofbrightness,withoutoverloadingtheI2C-busortyinguptheI2C-busmaster.KeyfeaturesApplications4CompatiblewithI2C-busandSMBus4LEDbacklighting4Twouser-programmableblinkratesanddutycycles4LEDcolormixing……

Abstract:ThisLED-drivercircuitproducesa500HzPWMsignalwith2%nonlinearityanddutycycleadjustablefrom0to100%,usinga0V-to-5VDCcontrolsignal.Maxim>DesignSupport>AppNotes>AmplifierandComparatorCircuits>APP4502Maxim>DesignSupport>AppNotes>DisplayDrivers>APP4502Keywords:LEDdrivers,LEDdimming,pulse-widthmodulation,PWM,dualcomparatorsAug10,2010APPLICATIONNOTE4502Single-ICPWMModulatorHas2%LinearityBy:AhmadAyarAbstract:ThisLED-drivercircuitproducesa500HzPWMsignalwith2%nonlinearityanddutycycleadjustablefrom0to100%,usinga0V-to-5VDCcontrolsignal.AsimilarversionofthisarticleappearedintheAugust28,2008issueofElectronicDesignmagazine.SomeLED-drivercircuitsachievedimmingbyapplyingavariabledutycycle(PWM)totheLED……

摘要：本应用笔记介绍了如何可以变暗CCFL灯管和用户如何最大限度地利用DS3881和DS3882CCFL控制器的CCFL逆变器的调光比。注意提供在汽车，工业和航空电子应用的实际实现的准则。Maxim>AppNotes>AUTOMOTIVEKeywords:CCFL,LCD,Automotive,Displays,DimmingRatio,coldcathodefluorescentlampFeb08,2007APPLICATIONNOTE3997HowtoAchievea300:1DimmingRatiowiththeDS3881/DS3882CCFLControllersAbstract:ThisapplicationnotedescribeshowCCFLlampscanbedimmedandhowausercanmaximizethedimmingratioofaCCFLinverterbyusingtheDS3881andDS3882CCFLcontrollers.Thenoteoffersguidelinesforpracticalimplementationsinautomotive,industrial,andavionicapplications.IntroductionTheDS3881andDS3882arecontrollersforcold-cathodefluorescentlamps(CCFLs)thatbacklightliquidcrystaldisplays(LCDs)inautomotive,industrial,andavionicapplications.Thesedesignsystemsoftenrequireawidedimmingratio.Anexa……

：白色发光二极管（WLED）驱动器，提供高效率和LCD显示器的背光的亮度匹配。控制亮度，这些驱动程序在配置串行或并行排列的LED电流调节。电荷泵驱动并联LED，其监管与个别监管机构或简单的镇流电阻的电流。基于电感的转换器提供电流的LED串，天生平等。两种配置的目的，有效地推动手机，掌上电脑，数码相机的LED。Maxim>Designsupport>Appnotes>Automotive>APP1804Maxim>Designsupport>Appnotes>Power-SupplyCircuits>APP1804Keywords:whiteLED,light-emittingdiode,bias,LCDbacklighting,serial,PWM,shutdown,lownoise,overvoltage,over-voltageprotection,dimmingcontrol,internalMOSFET,highefficiency,displays,currentregulators,brightnessmatching,currentmatchingMar25,2003REFERENCEDESIGN1804INCLUDES:TestedcircuitSchematicDescriptionDrivingLEDsinBattery-OperatedApplications:ControllingBrightnessPowerEfficientlyAbstract:Whitelight-emittingdiode(WLED)driversprovidehighefficiencyandbrightness……

摘要：DS3994是一个4通道冷阴极荧光灯控制器（CCFL）背光液晶显示器，在电视和电脑显示器应用（液晶显示器）。该设备采用突发调光控制灯的亮度。一个独特的功能允许为每个独立错开的四个通道的突发调光序列的开始。一套四个非易失性寄存器，允许用户编程为每个通道错开。计算器是可以帮助用户确定这些寄存器编程应有的价值。本应用笔记介绍了惊人的突发调光的优势，以及如何访问和使用计算器。Maxim>AppNotes>DISPLAYDRIVERSPOWER-SUPPLYCIRCUITSKeywords:DS3994,CCFL,burstdimming,calculator,cold-cathodefluorescentlamp,LCDSep11,2006APPLICATIONNOTE3898CalculatorSimplifiesProgrammingtheBurstDimmingStaggerontheDS3994Cold-CathodeFluorescentLamp(CCFL)ControllerAbstract:TheDS3994isa4-channelcontrollerforcold-cathodefluorescentlamps(CCFL)thatbacklightliquidcrystaldisplays(LCDs)inTVandPCmonitorapplications.Thedeviceusesburstdimmingtocontrolthebrightnessofthelamps.Auniquefeatureallowsthestartoftheburstdimmingsequenceforeachofthefourchannelstobestaggeredindependently.Asetoffournonvolatileregistersallowstheusertoprogramthestaggerforeachchannel.Ac……

摘要：此LED驱动电路产生500HzPWM信号与2%非线性和责任周期可调从0到100%，使用0V-5VDC控制信号。Maxim>DesignSupport>AppNotes>AmplifierandComparatorCircuits>APP4502Maxim>DesignSupport>AppNotes>DisplayDrivers>APP4502Keywords:LEDdrivers,LEDdimming,pulse-widthmodulation,PWM,dualcomparatorsAug10,2010APPLICATIONNOTE4502Single-ICPWMModulatorHas2%LinearityBy:AhmadAyarAbstract:ThisLED-drivercircuitproducesa500HzPWMsignalwith2%nonlinearityanddutycycleadjustablefrom0to100%,usinga0V-to-5VDCcontrolsignal.AsimilarversionofthisarticleappearedintheAugust28,2008issueofElectronicDesignmagazine.SomeLED-drivercircuitsachievedimmingbyapplyingavariabledutycycle(PWM)totheLED……

摘要：该电路从3.3V电源并联驱动多达四个白光LED，并调整总LED电流从1mA到106毫安在64个步骤，每一个为1dB。Maxim/Dallas>AppNotes>AUTOMOTIVEDIGITALPOTENTIOMETERSDISPLAYDRIVERSKeywords:portablepower,whiteLEDs,logarithmicdimming,chargepump,digitalpotentiometerJul20,2004APPLICATIONNOTE3287White-LEDDriverProvides64-StepLogarithmicDimmingThiscircuitdrivesasmanyasfourwhiteLEDsinparallelfroma3.3Vsource,andadjuststhetotalLEDcurrentfrom1mAto106mA,in64stepsof1dBeach.ThecircuitofFigure1isdesignedforportable-powerapplicationsthatrequirewhiteLEDswithadjustable,logarithmicdimminglevels.ItdrivesasmanyasfourwhiteLEDsfroma3.3Vsource,andadjuststhetotalLEDcurrentfrom1mAto106mAin64stepsof1dBeach.ThedriverisachargepumpthatmirrorsthecurrentISET(sourcedfromU3'sSETterminal)……

TheDS3994isa4-channelcontrollerforcold-cathodefluorescentlamps(CCFL)thatbacklightliquidcrystaldisplays(LCDs)inTVandPCmonitorapplications.Thedeviceusesburstdimmingtocontrolthebrightnessofthelamps.Auniquefeatureallowsthestartoftheburstdimmingsequenceforeachofthefourchannelstobestaggeredindependently.Asetoffournonvolatileregistersallowstheusertoprogramthestaggerforeachchannel.Acalculatorisavailabletohelpusersdeterminethepropervalueforprogrammingtheseregisters.Thisapplicationnotedescribestheadvantagesofstaggeringtheburstdimming,andhowtoaccessandusethecalculator.……