标签: stepup

电路窃取从并行端口，功率为8mA在5V提供效率高达94%。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSPOWER-SUPPLYCIRCUITSKeywords:powerconversion,parallelport,stepupswitchingconverter,SchottkydiodesMar14,2005APPLICATIONNOTE3468High-EfficiencyStep-UpConverterRobsParallelPortAbstract:Circuitincludingastep-upswitchingconverterstealspowerfromaparallelport,providing5Vat8mAwithefficiencyashighas94%.ThecircuitofFigure1stealsenergyfromaparallelportorfromanylimited-energysource.Suchpower-conversionapplicationsusuallyrequireveryhighefficiencyformakinguseoftheenergyavailable.Aparallel-dataport,forinstance,providesasmuchas2.6mAperdatalineat2.4V.Whentheeightdatalinesaresoftware-configuredtoFFHEX(allhigh),thatconditi……

摘要：MAX1708DC-DC转换电路中，可提高效率>78％的1.2V至1.6V特色。Maxim>DesignSupport>TechnicalDocuments>ApplicationNotes>BatteryManagement>APP4406Maxim>DesignSupport>TechnicalDocuments>ApplicationNotes>Power-SupplyCircuits>APP4406Keywords:operatingvoltage,single-cellpowersupply,stepupconvertersAug27,2009APPLICATIONNOTE4406PowerSupplyFeaturesLowVINandVOUTAug27,2009Abstract:TheMAX1708DC-DCconverterisfeaturedinacircuitthatboosts1.2Vto1.6Vwith>78%efficiency.ThisdesignideaappearedintheMay5,2006issueofPortableDesignmagazine.Theoperatingvoltagesfortoday’sASICsandmicroprocessorsaresubstantiallylowerthanthoseofafewyearsago,whichcreat……

摘要：降压型高达的的DC/DC的转换器有一个从输入到输出的的直接的路径（通过的电感器和肖特基二极管的的），使得一个完整的关机变得困难的。此电路达到通过调停的一个和输入和输出，之间的由一个RS-232收发器（MAX3384）控制的的的外部MOSFET的为MAX17112转换器的的完整的关机。Maxim>Designsupport>Appnotes>CircuitProtection>APP4835Maxim>Designsupport>Appnotes>InterfaceCircuits>APP4835Maxim>Designsupport>Appnotes>Power-SupplyCircuits>APP4835Keywords:battery-powered,stepupdc/dcconverters,shutdown,RS-232transceiversFeb07,2011APPLICATIONNOTE4835True-ShutdownCircuitAbstract:Step-upDC/DCconvertershaveadirectpathfrominputtooutput(viatheinductorandSchottkydiode)thatmakesafullshutdowndifficult.ThiscircuitachievesfullshutdownforaMAX17112converterbyinterposinganexternalMOSFETbetweeninputandoutput,controlledbyanRS-232transceiver(MAX3384).Asimilarversiono……

摘要：利用热电发电机（TEG）检测表面温度和升压开关稳压器，一个有用的水平提高甘醇输出，报警电路，闪烁的高亮度发光二极管的表面温度超过阈值时。Maxim>AppNotes>CircuitProtectionKeywords:hot-surfacewarning,SeebeckEffect,stepupswitchingregulator,boostregulator,thermoelectricgenerator,TEG,high-Dec06,2010brightnessLEDs,HBLEDsAPPLICATIONNOTE4535Hot-SurfaceWarningLightRequiresNoExternalPowerAbstract:Usingathermoelectricgenerator(TEG)tosensethetemperatureofasurfaceandastep-upswitchingregulatortoboosttheTEGoutputtoausefullevel,thiswarningcircuitflashesahigh-brightnessLEDwhenthesurfacetemperatureexceedsathreshold.AsimilarversionofthisarticleappearedintheFebruary4,2008issueofMachineDesignmagazine.Becauseahot-surfacewarninglightaffectspersonnelsafety,itmustoperatereliablywheneverthesurfaceishot.Heat,however,complicatesth……

摘要：一个SMBus™I/O扩展，升压转换器，数字电位器组成的电路实现的SMBus控制的液晶显示屏的对比度。Maxim>AppNotes>DIGITALPOTENTIOMETERSDISPLAYDRIVERSKeywords:LCDdrivers,SMBus,I/Oexpanders,digitalpotentiometers,stepupconvertersMar14,2005APPLICATIONNOTE3467SMBusI/OExpanderControlsLCDBiasVoltageAbstract:AcircuitconsistingofanSMBusI/Oexpander,step-upconverter,anddigitalpotentiometerenablestheSMBustocontrolthecontrastofanLCD.Small,handheld,battery-powereddevicesoftenfeatureanLCDpanelandamicrocontrollerwithlimitedI/Opins.TheSMBusisusefulforcontrollingsystemfunctionsunderlimitedI/Oand,forconvenience,itshouldalsobeabletocontroltheLCDcontrast.InFigure1,thistaskisaccomplishedwithanSMBusI/Oexpander(IC2),astep-upconverter(IC1),andadigitalpotentiometer(IC3).……

摘要：一个DC-DC升压转换器为基础的白光LED驱动器上运行一个或两个碱性电池，电压低至0.8V时开始。Maxim>AppNotes>DISPLAYDRIVERSPOWER-SUPPLYCIRCUITSKeywords:whiteLEDs,currentsource,stepupconverter,boostconverterMar23,2006APPLICATIONNOTE3755High-PowerWhite-LEDDriverOperateson1or2AlkalineCellsAbstract:Awhite-LEDdriverbasedonaDC-DCstep-upconverteroperatesononeortwoalkalinecells,andstartswithvoltagesaslowas0.8V.Replacingincandescentbulbswithhigh-powerwhiteLEDsyieldshigherreliabilityandgreaterluminousefficiency.AdirectconnectionbetweentheLEDandbattery,however,isnotideal.Comparedwiththealkalinebatteriesusedinmostportableapplications,apowersourceforwhiteLEDsshouldactmorelikeacurrentsourceandofferhigheroperatingvoltages.Itshoul……