标签: buck-boost

Buck-boostConverterTiApplicationReportSLVA059A-March1999RevisedNovember2002UnderstandingBuck-BoostPowerStagesinSwitchModePowerSuppliesEverettRogersABSTRACTAswitchingpowersupplyconsistsofthepowerstageandthecontrolcircuit.Thepowerstageperformsthebasicpowerconversionfromtheinputvoltagetotheoutputvoltageandincludesswitchesandtheoutputfilter.Thisreportaddressesthebuck-boostpowerstageonlyanddoesnotcovercontrolcircuits.Detailedsteady-stateandsmall-signalanalysisofthebuck-boostpowerstageoperatingincontinuousanddiscontinuousmodeispresented.Variationsinthestandardbuck-boostpowerstageandadiscussionofpowerstagecomponentrequirementsareincluded.SystemPowerContents1Introduction..................……

在单锂离子电池供电的手持式设备应用中，输入电压可从4.2V的初始值降至2.5V。对如此的电池电压变化范围进行稳压是一个挑战。最常用的方法是采用SEPIC转换器，但一般的效率和需要耦合电感和大电流反激式电容使其并不是一个理想选择。LTC3440集成了专利控制技术，通过调整内部的四个开关的相位达到输出电压高于、等于或低于输入电压的目的。在整个电池电压范围内的效率超过90%。advertisementSingleInductor,TinyBuck-BoostConverterProvides95%EfficiencyinLithium-Ionto3.3VApplications……

LTC3780是一款恒频电流模式升压开关整流控制器，允许输入电压高于、低于或等于输出电压。其高效、高功率密度和单电感拓扑结构使其成为汽车、电信、医疗和电池供电系统的极佳选择。advertisementIndustry’sFirst4-SwitchBuck-BoostControllerAchievesHighestEfficiencyUsingaSingleInductor……

LTC3530具有高效、宽输入电压范围、小电路面积的优势，使其适合于不同电池供电产品或效率敏感型的应用。其可编程特性或用来满足多种应用需要，同时保证了紧凑的引脚封装。WideInputVoltageRangeBuck-BoostConverterSimpliesDesignofVariableInputSupplies……

除了采用LTM4605或LTM4607，没有其他方法能够实现效率高集成度的升压-降压转换器。只需要一个电感、一个检测电阻和一个输入电容，而无需其他技巧即可实现高达98%的效率。PCB部分的小面积LGA封装使共具有良好的热性能，可实现168W功率输出(8cm×8.4cm4-layerPCB)。这些器件是汽车、电信、医疗、电机驱动和电池供电应用的理想解决方案。ModuleBuck-BoostRegulatorsOfferaSimpleandEfcientSolutionforWideInputandOutputVoltageRangeApplicationsDesignNote438JianYinandEddieBevilleIntroductionLowProleSolutionAnincreasingnumberofapplicationsrequireDC/DCThesepowermodulesareofferedinaspacesavingconvertersthatproduceanoutputthatfallssomewhereandthermallyenhanced15mm×15mm×2.8mmLGAwithintheinputvoltagerange.Theproblemisthatpackage.Thislowprolepackagecantthebacksideconventionalbuck-boostconvertertopologies,suchasofPCboardsformanyhighdensitypoint-of-loadap-SEPICorboostfollowedbybuck,arecomplex,inefcientplications.Theirhighswitchingfrequencyand……

本文探讨了一种可替代基于变压器拓扑结构的升降压转换器的工作原理，LTC3789是工作于恒流恒开关频率的升降压开关稳压控制器，电流控制模式简化了环路补偿，获得更好的负载性能和线性暂态响应。advertisementHighEfciency4-SwitchBuck-BoostControllerProvidesAccurateOutputCurrentLimit……

摘要：电荷泵往往供电低功耗和低成本的应用程序需要的最佳选择。本应用笔记讨论了集成的电荷泵，并解释如何计算功耗电荷泵。Maxim>DesignSupport>AppNotes>Automotive>APP725Maxim>DesignSupport>AppNotes>Power-SupplyCircuits>APP725Keywords:powersupply,voltageconverter,dc-dcconverters,chargepumps,switchedcapacitorregulator,regulatedchargepump,unregulatedchargepump,voltagedivider,voltagedoubler,regulatedinverter,buck-boost,regulator,chargepumppowerdissipationJul22,2009APPLICATIONNOTE725DC-DCConversionWithoutInductorsAbstract:Chargepumpsareoftenthebestchoiceforpoweringanapplicationthatrequiresbothlowpowerandlowcost.Thisapplicationnotediscussesintegratedchargepumpsandexplainshowtocalculatepowerdissip……

摘要：USB供电设备需要受规管的供应。不幸的是，USB总线电压可以因4V9V。将MAX668升压控制器配置到步上/步落拓扑可以生成电流限制受规管的供应。Maxim>AppNotes>AUTOMOTIVEPOWER-SUPPLYCIRCUITSKeywords:USB,UniversalSerialBus,step-upstep-down,SEPIC,buck-boost,DC-DCcontroller,boostAug06,2002controller,DCtoDCAPPLICATIONNOTE1161CurrentLimitedDC-DCControllerUsedasStep-UpStep-DownSEPICPowerSupplyforUSBDevicesAbstract:USBpowereddevicesrequirearegulatedsupply.Unfortunately,theUSBbusvoltagecanvaryfrom4Vto9V.ConfiguringtheMAX668boostcontrollerintostep-up/step-downtopologycangenerateacurrent-limitedregulatedsupply.UniversalSerialBus(USB)isapopularwaytoconnectPCsandconsumerdevices.Itissimpleandinexpensiveandcanconnectmultipleexternalperipheralssimultaneously.Asmobiledevicesaddmorefunctionalitysuchastextmessaging,websurfin……

换器，LDO稳压器提供了更好的电池寿命比传统的SEPIC设计工作时，从一个锂离子电池。MAX1800多声道数码相机电源IC升压加为SEPIC设计的LDO的设计和1MAX668说明了这一点。Maxim>AppNotes>AUTOMOTIVEPOWER-SUPPLYCIRCUITSKeywords:lithium-ion,SEPIC,buck-boost,stepup/down,step-up/step-down,converters,DC-DCconverter,LiDec01,2000+,lithiumbattery,powersupply,MAX1800,MAX668,digitalcamerapowerIC,integratedcircuits,DC-DCboostconvertersAPPLICATIONNOTE471Step-upConverterwithLDOBeatsSEPICEfficiencyAbstract:Astep-upconverterfollowedbyanLDOregulatoroffersbetterbatterylifethanaclassicSEPICdesignwhenoperatingfromonelithium-ioncell.ThisisdemonstratedwiththeMAX1800multi-channeldigitalcamerapowerICforthestep-upplusLDOdesignandaMAX668fortheSEPICdesign.AdditionalInformation:qQuickViewDataSheetfortheMAX668/MAX669qSamplesandLiteratureOrderForm……

摘要：降压/升压转换器，成功地解决了调节一个12V的宽输入电压摆动与密封铅酸蓄电池的挑战。Maxim>AppNotes>CIRCUITPROTECTIONPOWER-SUPPLYCIRCUITSKeywords:buck/boostconverter,buck-boost,dc-dcconverters,batterypowersupply,12Vregulation,MAX641Jul09,1998APPLICATIONNOTE411Derive12VFrom8Vto15VInputAbstract:Thebuck/boostconvertersuccessfullyaddressesthechallengeofregulatinga12Vfromthewideinput-voltageswingassociatedwiththesealedlead-acidbattery.Derive12VFrom8Vto15VInputYoucan'tderivearegulated12Voutputfroma12Vlead-acidbatterybyusingasimpleboostconverterbecauseititcan'tacceptaninputvoltagethatisgreaterthanitsoutputvoltage.Conversly,abuckconverterisacombinationofbuckandboostcircuitrythatsuccessfullyaddressesthechallengeofthewideinput-voltageswingassociatedwit……