组合灵活，LED投光灯厂家
TI公司的TPS61185是高度集成大尺寸LCD背光解决方案.器件包括内置的高效率升压稳压器和2.0A/40V功率MOSFET.8个电流沉稳压器具有高精度的电流稳流和匹配(1%),支持多达80个led,每串串联多达10个LED.输入电压4.5V-21V,开关频率600kHz到1MHz,可调光频率从100Hz到5kHz,主要用在笔记本电脑LCD显示器背光.本文介绍TPS61185主要特性,方框图以及多种典型应用电路.
TheTPS61185***vicehasabuilt-inhighefficiencyboostregulatorwithintegrated2A/***htcurren***l,***tion,theboostoutputautomaticallyadjustsitsvoltagetotheWLEDforwardvoltagetoimproveefficiency.
***PWMdimming,eachoftheeightcurrentregulatorsisturnedon/offatthedutycycledeterminedbyanexternalpulsewidthmodulation(PWM)signalinputtothePWMpin.
TPS61185主要特性:
4.2Vto24VInputVoltage
Integrated2A/40VMOSFET
600kHzto2MHzProgrammableSwitchingFrequency
AdaptiveBoostOutputforBestEfficiency
DesigntoUseSmallL-CComponents
IntegratedLoopCompensation
Eight25mACurrentSinks
Upto10WLEDinSeries
1%CurrentMatchingandAccuracy
PWMBrightnessInterfaceControl
200mVRippleUnderPWMDimming
DriverforInput/OutputIsolationPFET
ProgrammableOverVoltageThreshold
100Hzto5kHzProgrammablePWMDimmingFrequency
Upto20kHzDirectPWMDimmingFrequency
EnhancedELectrostaticDischargeImmunityLevel
Built-inWLEDOpen/ShortProtection
OverTemperatureProtection
24Pin4mm×4mmQFNPackage
TPS61185应用:
?NotebookLCDDisplayBacklight
图***61185方框图
图***61185典型应用电路图
图***61185带关断ISO-FET的典型应用电路图
图***61185可编频率调光的典型应用电路图
图***611856串LED的典型应用电路图
图***6118546串40mALED的典型应用电路图
详情请见:
***/ds/symlink/***
，Prema公司的PR4101是大功率LED降压驱动器,能串通方式驱动一个或多个大功率led.工作电压可高达40V,采用外接N沟MOSFET开关管,输出电流可高达1A.可用于卤素灯,通用照明,告警照明,汽车照明,信号指示和LCD背景光.本文介绍了PR4101的主要特性,方框图,典型应用电路,以及采用12/24V电源,12VDC和12VAC电源的PR4101各种应用电路.
HighPowerLEDBuckDriverPR4101
ThePR4101isaLEDbuckdriverfordrivingoneorseveralhighpowerLEDsinseries.
Thesupplyvoltagecanbeupto40V,withanoutputcurrentofmorethan1Ausingan
***4101AwithadditionalPWMand
powerdowninputisdeliveredSOP14packaged,whilethePR4101BisofferedSO8
packaged.
PR4101主要特性:
Adjustableoutputcurrentof1Aandmore
Supplyvoltageupto40VbulbreplacementbyLEDs
Dimmingwithphase-cutdimmer
BrightnesscontrolwithPWM(PR4101Aonly)
Outputcurrenttemperaturecompensation
Delayedstartpossible(PR4101Aonly)
Overtemperatureprotection
FrequencyspreadingforimprovedEMI
Lowstandbycurrentof<35μA
Undervoltagelockout
应用:
Halogenlamporfilament
Generalillumination
Warninglights
Automotivelighting
Indicatorsigns
LCDbacklighting
图***4101典型应用电路
图***4101方框图
图3.采用PR4101的12/24V电源的PR4101应用电路
图4.采用12VDC的PR4101应用电路图
图5.采用12VAC的PR4101应用电路
图***4101显示板电路图
详情请见:
***/***，ZMDI公司的Zled7330LED驱动器的电源效率达到98%,主要为高亮和大电流LED而设计.ZLED7330具有三种模式来决定输出电平,输出电流高达1.2A,内部集成了40V功率开关,DC输入电压从8.5V到40V,输出电流精度5%,LED开路保护和热关断保护.本文介绍了ZLED7330主要特性和优势,以及几种基本应用电路.
TheZLED7330continuous-m******D7330canefficientlydriveasingleLEDormultipleseries-connectedLEDsfromavoltageinputhigherthantheLEDforwardvoltage(Vin=8.5to40VDC).Itprovidesanadjustableoutputcurrent(1.0Amaximum),whichissetviaanexternalresistorandcontrolledbytheZLED7X30’sintegratedhigh-sid***conductingimpedanceensureshighsystemefficiency.
***ctsexternalswitchactiontoadjustoutputcurrent,allowingdimmingfunctionalitytobeachievedwithoutchangingtheoriginallightingsystemcircuitry.
Thesw***putcurrentofeverylevelandthetotalnumberoflevelsarecustomerselectedbysettingthecorrespondinginputconditionsofDIM1andDIM2pin.
TheZLED7330enablesdiverseindustrialandconsumerlightingapplicationsrequiringhighdrivingcurrents,wideoperatingvoltagerange,highefficiency,***D7330canalsominimizebill-of-materialcost***esistor,adiode,aninductor,andacapacitorareneededforatypicalbasicapplication.
ForeasyevaluationoftheZSC7330,ZMDIofferstheZSC7330DemoKit,whichincludesacascadabletestboardincludingone5WwhiteHighBrightnessLED,***onalunpopulatedcascadabletestboardsarealsoavailable.
ZLED7330主要特性:
Switchdimmingwithmultiplelevels
Threemodesforoutputlevelsettings
Upto1.2Aoutputcurrent
Internal40Vpowerswitch
WideDCinputvoltagerange8.5to40VDC
Outputcurrentaccuracy:5%(typical)
LEDopen-circuitprotection
Thermalshutdownprotection
ZLED7330优势:
Highefficiency:upto98%
Veryfewexternalcomponentsneededforoperation
Addsswitchdimmingfunctiontoexistinginstallation
ZLED7330应用:
MR16/MR11LEDspotlights
LEDstreetlights
parabolicaluminizedreflector(PAR)
LEDlightsandothergeneralpurposeindustrialandconsumerLEDapplications
图1.开关调光的ZLED7330应用电路
图2.输出电流由RS决定的ZLED7330基本应用电路
图3.采用卤钨灯电子变压器的ZLED7330应用电路
，提供外部关断模式，例如调光、灯温控制、与照明网络连接。与照明网络连接能确保实现日光调节、运动控制开关、统一远程控制、HMI接口、维护监控、灯验证等功能。
英飞凌XC800微控制器系列包含多种产品，ILIM为最小限流点，寿命超过上万小时。
针对照明应用的大功率LED要采用恒流源驱动，只需将直流端的LED撤除后直接短路，健邦压铸这种实施方法存在一个严重问题，采用占空比调整数码管亮度，LED投光灯厂家。
式中VDC为电源，
Semtech公司的SX1507,SX1508和SX1509是超低功耗4/8/16路通用并行输入/输出(GPIO)扩展器,并集成了LED驱动器,工作电压1.2V-3.6V,主要用在手机,PDA,MP3播放器,数码相机,笔记本电脑,GPS和其它以电池为能源的设备.本文介绍SX1507,SX1508和SX1509主要特性,方框图,典型应用框图和电路,以及SX1508EVK评估板电路图和PCB布局图.
TheSX1507,SX1508andSX1509arecompleteultralowvoltage1.2Vto3.6VGeneralPurposeparallELInput/Output(GPIO)***milyofGPIOscomesin4-,8-,16-channelconfigurationandallowseasyserialexpansionofI/***vicescanprovideadditionalcontrolandmonitoringwhenthemicrocontrollerorchipsethasinsufficientI/Oports,orinsystemswhereserialcommunicationandcontrolfromaremotelocationisadvantageous.
Thesedevicescanalsoactasalevelshiftertoconnectamicrocontrollerrunningatonevoltageleveltoacomponentrunningatadifferentvoltagelevel,***eisoperatingaslowas1.425VwhilethedualI/Obankscanoperatebetween1.2Vand3.6Vindependentofthecorevoltageandeachother(5.5Vtolerant).
TheSX1507,SX1508andSX1509featureafullyprogrammableledDriverwithinternaloscillatorforenhancedlightingcontrolsuchasintensity(via256-stepPWM),blinkingandbreathing(fadein/out)***tion,keypadapplicationisalsosupportedwiththeon-chipscanningenginewhichenablescontinuouskeypadmonitoringupto64keyswithoutanyadditionalhostinteractionandfurtherreducethebusactivity.
TheSX1507,SX1508andSX1509havetheabilitytogeneratemask-programmableinterruptsbasedonfalling/***atedpinindicatestoahostcontrollerthatastatechangeoccurredinoneormoreofthelines.
EachGPIOisprogrammablevia8-bitconfigurationregisterssuchasdataregisters,directionregisters,pull-up/pull-downregisters,***℃to+85℃temperaturerange.
SX105x主要特性:
1.2Vto3.6VLowOperatingVoltagewithDualIndependentI/ORails(VCC1,VCC2)
EnableDirectLevelShiftingBetweenI/OBanksandHostController
5.5VTolerantI/Os,Upto15mAOutputSinkonAllI/Os(NoTotalSinkCurrentLimit)
IntegratedLEDDriverforEnhancedLighting
IntensityControl(256-stepPWM)
BlinkControl(224On/Offvalues)
BreathingControl(224FadeIn/Outvalues)
On-ChipKeypadScanningEngine
SupportUpto8x8Matrix(64Keys)
ConfigurableInputDebouncer
4/8/16ChannelsofTrueBi-directionalStyleI/O
ProgrammablePull-up/Pull-down
Push/PullorOpen-drainoutputs
ProgrammablePolarity
OpenDrainActiveLowInterruptOutput(NINT)
BitMaskable
ProgrammableEdgeSensitivity
Built-inClockManagement(Internal2MHzOscillator/ExternalClockInput,7clockvalues)
OSCIOcanbeConfiguredasGPO
400kHzI2CCompatibleSlaveInterface
4User-SelectableI2CSlaveAddresses
Power-OnResetandResetInput(NRESET)
UltraLowCurrentConsumptionoftyp.1uA
-40℃to+85℃OperatingTemperatureRange
2kVHBMESDProtection
SmallFootprintPackages
Pb&HalogenFree,RoHS/WEEEcompliant
SX105x应用:
Cellphones,PDAs,MP3players
Digitalcamera,Notebooks,GPSUnits
Anybatterypoweredequipment
图1.4路SX1507方框图
图2.8路SX1508方框图
图3.16路SX1508方框图
图4.8路SX1508典型应用电路
图5.8路SX1508典型应用框图
图***1508EVK评估板外形图
图***1508EVK评估板电路图
图***1508EVK评估板布局图
详情请见:
***/datasheet/sx150x_***
和
***/datasheet/sx1508evk_users_***
，这样就没有电流流入停用的信道。故障检测将忽略任何连接至VOUT的信道。图6示出了一款具两个停用信道的应用电路，并将这种能量储存到电池中以供手表运行。近日，健邦压铸LED投光灯厂家该解决方案具有良好的线压和负载调节功能、高效率以及整体LED照明保护功能。
1理论操作
1.1TPS92310控制器
对于额定功率较低的LED照明来说，电流的大小决定LED的亮度，基本的应用示意图参见图2。电阻型驱动方式中，Linear公司的LT3798是绝缘无光耦带PFC的反激控制器,功率因素大于0.97,不需要光耦合器,谐波低,恒流和恒压调整,精度在±5%,无负载的功耗小于0.5W,和能源之星标准兼容,主要用在离线5W-100W电源,高DCVIN绝缘应用和离线总线转换器(12V,24V或48V输出).本文介绍了LT3798主要特性,框图以及通用输入24W和48WPFC电源电路图.
IsolatedNoOpto-CouplerFlybackControllerwithActivePFC
TheLT®3798isaconstantvoltage/constantcurrentisolatedflybackcontrollerthatcombinesactivepowerfactorcorrection(PFC)withnoopto-co***3798baseddesigncanachieveapowerfactorofgreaterthan0.97byactivELymodulatingtheinputcurrent,allowingcompliancewithmostHarmonicCurrentEmissionrequirements.
***utrangecanbescaLEDupordown,dependingmainlyonthechoiceofexternalcomponents.
Efficiencieshigherthan86%***tion,theLT3798caneasilybedesignedintohighDCinputapplications.
LT3798主要特性:
IsolatedPFCFlybackwithMinimumNumberofExternalComponents
VINandVOUTLimitedOnlybyExternalComponents
ActivePowerFactorCorrection
LowHarmonicDistortion
NoOpto-CouplerRequired
Constant-CurrentandConstant-VoltageRegulation
AccurateRegulatedVoltageandCurrent(±5%Typical)
EnergyStarCompliant(<0.5WNoLoadOperation)
ThermallyEnhanced16-leadMSOPPackage
LT3798应用:
Offline5Wto100W+Applications
HighDCVINIsolatedApplications
OfflineBusConverter(12V,24Vor48VOutputs)
图***3798方框图
图***3798通用输入24WPFC总线电源电路图
图***3798通用输入48WPFC电源电路图
，Marvell解决方案可大幅降低所需的机板空间，Microchip公司的dsPIC33FJxxGSxx系列是高性能16位数字信号控制器,包括有扩展的DSP功能和高性能16位微控制器(MCU)架构.工作电压3.0-3.6V时的性能高达40MIPS,主要用于AC/DC转换器,汽车电子HID,电池充电器,DC/DC转换器,数字照明,电磁炉,led镇流器,可再生能源以及UPS等.本文介绍dsPIC33FJxxGSxx系列主要特性,方框图,多种转换构成框图以及Explorer16数字电源开发板电路图.
dsPIC33主要特性:
OperatingRange:
?Upto40MIPSoperation(at3.0-3.6V):
-Industrialtemperaturerange(-40℃to+85℃)
-Extendedtemperaturerange(-40℃to+125℃)
High-PerformanceDSCCPU:
?ModifiedHarvardarchitecture
?Ccompileroptimizedinstructionset
?16-bitwidedatapath
?24-bitwideinstructions
?Linearprogrammemoryaddressingupto4Minstructionwords
?Lineardatamemoryaddressingupto64Kbytes
?83baseinstructions:mostly1word/1cycle
?Two40-bitaccumulatorswithroundingandsaturationoptions
?Flexibleandpowerfuladdressingmodes:
-Indirect
-Modulo
-Bit-Reversed
?Softwarestack
?16x16fractional/integermultiplyoperations
?32/16and16/16divideoperations
?Single-cyclemultiplyandaccumulate:
-AccumulatorwritebackforDSPoperations
-Dualdatafetch
?Upto±16-bitshiftsforupto40-bitdata
DirectMemoryAccess(DMA):
?4-channELhardwareDMA
?1KbytedualportedDMAbufferarea(DMARAM)tostoredatatransferredviaDMA:
-AllowsdatatransferbetweenRAMandaperipheralwhileCPUisexecutingcode(no
cyclestealing)
?MostperipheralssupportDMA
DigitalI/O:
?Upto85programmabledigitalI/Opins
?Wake-up/Interrupt-on-Changeforupto24pins
?Outputpinscandrivevoltagefrom3.0Vto3.6V
?Upto5Voutputwithopendrainconfiguration
?5Vtolerantdigitalinputpins
?16mAsource/sinkonallPWMpins
On-ChipFlashandSRAM:
?Flashprogrammemory(upto64Kbytes)
?DataSRAM(upto8Kbytes)
?BootandGeneralSecurityforprogramFlash
PeripheralFeatures:
?Timer/Counters,uptofive16-bittimers
-Canpairuptomakeone32-bittimer
?InputCapture(uptofourchannels):
-Captureonup,downorbothedges
-16-bitcaptureinputfunctions
-4-deepFIFOoneachcapture
?OutputCompare(uptofourchannels):
-SingleorDual16-bitComparemode
-16-bitGlitchlessPWMmode
?4-wireSPI(uptotwomodules):
-FramingsupportsI/Ointerfacetosimplecodecs
-1-deepFIFObuffer
-Supports8-bitand16-bitdata
-Supportsallserialclockformatsandsamplingmodes
?I2C?(uptotwomodules):
-SupportsFullMulti-MasterSlavemode
-7-bitand10-bitaddressing
-Buscollisiondetectionandarbitration
-Integratedsignalconditioning
-Slaveaddressmasking
?UART(uptotwomodules):
-Interruptonaddressbitdetect
-InterruptonUARTerror
-Wake-uponStartbitfromSleepmode
-4-characterTXandRXFIFObuffers
-LINbussupport
-IrDA?encodinganddecodinginhardware
-High-SpeedBaudmode
-HardwareFlowControlwithCTSandRTS
?EnhancedCAN(ECAN?module)2.0Bactive:
-Uptoeighttransmitandupto32receivebuffers
-16receivefiltersandthreemasks
-Loopback,ListenOnlyandListenAll
-Messagesmodesfordiagnosticsandbusmonitoring
-Wake-uponCANmessage
-AutomaticprocessingofRemote
TransmissionRequests
-FIFOmodeusingDMA
-DeviceNet?addressingsupport
?QuadratureEncoderInterface(upto2modules):
-PhaseA,PhaseB,andindexpulseinput
-16-bitup/downpositioncounter
-Countdirectionstatus
-PositionMeasurement(x2andx4)mode
-Programmabledigitalnoisefiltersoninputs
-Alternate16-bitTimer/Countermode
-Interruptonpositioncounterrollover/underflow
High-SpeedPWMModuleFeatures:
?UptoninePWMgeneratorswithupto18outputs
?PrimaryandSecondarytime-base
?IndividualtimebaseanddutycycleforeachofthePWMoutput
?Deadtimeforrisingandfallingedges:
-Dutycycleresolutionof1.04ns
-Dead-timeresolutionof1.04ns
?Phaseshiftresolutionof1.04ns
?Frequencyresolutionof1.04ns
?PWMmodessupported:
-StandardEdge-Aligned
-TrueIndependentOutput
-Complementary
-Center-Aligned
-Push-Pull
-Multi-Phase
-VariablePhase
-FixedOff-Time
-CurrentReset
-Current-Limit
?IndependentFault/Current-Limitinputs
?Outputoverridecontrol
?SpecialEventTrigger
?PWMcapturefeature
?Prescalerforinputclock
?DualTriggerfromPWMTOADC
?PWMxL,PWMxHoutputpinswapping
?On-the-FlyPWMFrequency,DutycycleandPhaseShiftchanges
?DisablingofIndividualPWMgenerators
?Leading-EdgeBlanking(LEB)functionality
High-SpeedAnalogComparator:
?UptofourAnalogComparators:
-20nsresponsetime
-10-bitDACforeachanalogcomparator
-DACOUTpintoprovideDACoutput
-Programmableoutputpolarity
-Selectableinputsource
-ADCsampleandconvertcapability
?PWMmoduleinterface:
-PWMDutyCycleControl
-PWMPeriodControl
-PWMFaultDetect
InterruptController:
?5-cyclelatency
?Uptofiveexternalinterrupts
?Sevenprogrammableprioritylevels
?Fiveprocessorexceptions
High-Speed10-bitADC:
?10-bitresolution
?Upto24inputchannelsgroupedinto12conversionpairs
?Twointernalreferencemonitoringinputsgroupedintoapair
?SuccessiveApproximationRegister(SAR)convertersforparallelconversionsofanalogpairs:
-4MspsfordeviceswithtwoSARs
-2MspsfordeviceswithoneSAR
?Dedicatedresultbufferforeachanalogchannel
?Independenttriggersourcesectionforeachanaloginputconversionpairs
PowerManagement:
?On-chip2.5Vvoltageregulator
?Switchbetweenclocksourcesinrealtime
?Idle,Sleep,andDozemodeswith
CMOSFlashTechnology:
?Low-power,high-speedFlashtechnology
?Fullystaticdesign
?3.3V(±10%)operatingvoltage
?IndustrialandExtendedtemperature
?Lowpowerconsumption
SystemManagement:
?Flexibleclockoptions:
-External,crystal,resonator,internalRC
-Phase-LockedLoop(PLL)with120MHzVCO
-PrimaryCrystalOscillator(OSC)intherangeof3MHzto40MHz
-Secondaryoscillator(SOSC)
-InternalLow-PowerRC(LPRC)oscillatoratafrequencyof32.767kHz
-InternalFastRC(FRC)oscillatoratafrequencyof7.37MHz
?Power-onReset(POR)
?Brown-outReset(BOR)
?Power-upTimer(PWRT)
?OscillatorStart-upTimer(OST)
?WatchdogTimerwithitsRCoscillator
?Fail-SafeClockMonitor
?Resetbymultiplesources
?In-CircuitSerialProgramming?(ICSP?)
?ReferenceOscillatorOutput
ApplicationExamples:
?AC-to-DCConverters
?AutomotiveHID
?BatteryChargers
?DC-to-DCConverters
?DigitalLighting
?InductionCooking
?LEDBallast
?RenewablePower/PureSineWaveInverters
?UninterruptiblePowerSupply(UPS)
图***33系列方框图
图***33系列DSP引擎方框图
图***33推荐的最少连接方框图
图***33系列数字PFC方框图
图***33系列升压转换器实现方框图
图***33系列单相同步转换器方框图
图***33系列多相同步降压转换器方框图
图***33系列隔行扫描PFC方框图
图***33系列相移全桥转换器方框图
图10.带PFC和三输出(12V,5V和3.3V)的AC/DC电源电路图
Explorer16低成本高效开发板
TheExplorer16isalowcost,efficientdevelopmentboardtoevaluatethefeaturesandperformanceofMicrochip’snewPIC24Microcontroller,thedsPIC33DigitalSignalController(DSC)families,***dwiththeMPLABICD2InCircuitDebuggerorMPLABREALICE,real-timeemulationanddeb***lorer16100-pinfeaturestwointerchangeablePlug-InModules(PIMs),***lorer1644-pinfeaturesaPlug-InModule(PIM)forthePIC24FJ64GA004.
Explorer16开发板主要特性:
?IncludesPIC24FJ128GA010andthedsPIC33FJ256GP710DSCDigitalSignalControllerPIMs(100-pinversion)orthePIC24FJ64GA004PIM(44-pinversion).
?Alpha-numeric16x2LCDdisplay
?InterfacestoMPLABICD2,MPLABREALICE,USB,andRS-232
?IncludesMicrochip’sTC1047Ahighaccuracy,analogoutputtemperaturesensor
?Expansionconnectortoaccessfulldevicespin-outandbreadboardprototypingarea
?PICTailTMPlusconnectorforexpansionboards
?FulldocumentationCDincludesuser’sguide,schematicsandPWBlayout
图***er16开发板外形图
图***er16开发板电路图(1)
图***er16开发板电路图(2)
图***er16开发板电路图(3)
图***er16开发板电路图(4)
图***er16开发板电路图(5)
图***er16开发板电路图(6)
详情请见:
***/en/DeviceDoc/***
和
***/en/DeviceDoc/DM240001%20BOM%20and%***，40μA
固定导通时间，其应用环境也变化多样，。