标签: overvoltage

NCP3712ASNT1-DOvervoltageProtectedHighSideSwitch

NCP367-DOvervoltageProtectorwithOCPandVBATDetect

NCP349-DPositiveOvervoltageProtectionCircuitwithInternalLowRonNMOSFET

SurgeProtectionSimplifiedwithIntersil'sOvervoltageProtected(OVP) 

CeramicInputCapacitorsCanCauseOvervoltageTransients.pdfApplicationNote88March2001CeramicInputCapacitorsCanCauseOvervoltageTransientsGoranPericaArecenttrendinthedesignofportabledeviceshasbeenBuildingtheTestCircuittouseceramiccapacitorstofilterDC/DCconverterinputs.Toillustratetheproblem,atypical24VwalladapterusedCeramiccapacitorsareoftenchosenbecauseoftheirinnotebookcomputerapplicationswasconnectedtothesmallsize,low……

AnalogMultiplexerswithOvervoltageProtectionAnalogMultiplexerswithOvervoltageProtectionApplicationNoteAugust2002AN1032IntroductionItshouldbeemphasizedthatonlytheHl-506Athrough509A,andHI-0546throughHI-0549,(andexactequivalentsfromAnaloginputsignalswhichoriginateexternallytoasystemcan……

本应用笔记说明针对过压和反向极性和端口如何保护移动设备和充电器电池充电拓扑结构，以及如何使用恩智浦半导体双极型和MOS晶体管保护器件。AN10910ProtectingchargerinterfacesandtypicalbatterychargingtopologieswithexternalbypasstransistorsRev.2―23June2011ApplicationnoteDocumentinformationInfoContentKeywordsBISS,MOSFET-Schottky,lowVCEsat,batterycharger,Li-Ionbattery(Li-polymerbattery),overvoltageprotection,reversepolarityprotection,ESDprotectionAbstractThisapplicationnoteillustrateshowtoprotectamobiledevicechargerportagainstovervoltageandreversepolarityandgivesanoverviewoftypicalbatterychargingtopologiesandhowtouseNXPSemiconductorsp……

AutomotiveLinearRegulatorsMinimizeQuiescentCurrent……

摘要：如果应用中是在完成系统部署后写入EPROM器件，此时需要对5V器件提供过压保护。本文介绍如何在同一总线上使用1-WireEPROM和5V1-Wire器件，以及如何保护5V器件不受编程脉冲的冲击。为5V1-Wire从器件提供过压保护BernhardLinke,首席技术专家Mar01,2012摘要：如果应用中是在完成系统部署后写入EPROM器件，此时需要对5V器件提供过压保护。本文介绍如何在同一总线上使用1-WireEPROM和5V1-Wire器件，以及如何保护5V器件不受编程脉冲的冲击。引言大多数1-Wire器件工作在2.8V至5.25VVPUP，进行读、写操作。EPROM器件(包括DS2406、DS2502、DS1982、DS2505和DS1985)需要12V编程脉冲进行写操作。而编程脉冲对于不能承受5.5V以上电压的器件构成了过压威胁。因此，如果应用中需要在完成系统部署之后写入EPROM器件，则要对5V器件进行保护(图1)。本文电路具有高达40V的正向过压保护，在电压高于12VEPROM编程脉冲的条件下提供系统防护。图1.包含5V和12V器件的1-Wire总线保护电路要求合适的保护电路需要满足以下几项要求：对1-Wire总线形成非常低的负载不妨碍1-WireEPROM编程适当保护5V1-Wire器件维持完整的通信信号幅值此外，最好采用常用的低成本元件构建保护电路。基本原理图2所示为非常简单的保护电路。齐纳二极管U1限制Q1的栅极电压，R1限制通过U1的电流。Q1为n沟道MOSFET，配制成源极跟随器，栅极电压减去一个小的偏移电压后达到1-Wire从器件的IO电压。为维持完整的通信信号幅值，偏移电压应尽可能低。具有负偏压的耗尽型MOSFET非常适合这一应用。对SupertexDN3135进行测试，测得其偏压为-1.84V(数据资料参数VGS(OFF))。由此，要求栅极电压VG为3.16V，决定了U1的……

摘要：如果应用中是在完成系统部署后写入EPROM器件，此时需要对5V器件提供过压保护。本文介绍如何在同一总线上使用1-WireEPROM和5V1-Wire器件，以及如何保护5V器件不受编程脉冲的冲击。为5V1-Wire从器件提供过压保护BernhardLinke,首席技术专家Mar01,2012摘要：如果应用中是在完成系统部署后写入EPROM器件，此时需要对5V器件提供过压保护。本文介绍如何在同一总线上使用1-WireEPROM和5V1-Wire器件，以及如何保护5V器件不受编程脉冲的冲击。引言大多数1-Wire器件工作在2.8V至5.25VVPUP，进行读、写操作。EPROM器件(包括DS2406、DS2502、DS1982、DS2505和DS1985)需要12V编程脉冲进行写操作。而编程脉冲对于不能承受5.5V以上电压的器件构成了过压威胁。因此，如果应用中需要在完成系统部署之后写入EPROM器件，则要对5V器件进行保护(图1)。本文电路具有高达40V的正向过压保护，在电压高于12VEPROM编程脉冲的条件下提供系统防护。图1.包含5V和12V器件的1-Wire总线保护电路要求合适的保护电路需要满足以下几项要求：对1-Wire总线形成非常低的负载不妨碍1-WireEPROM编程适当保护5V1-Wire器件维持完整的通信信号幅值此外，最好采用常用的低成本元件构建保护电路。基本原理图2所示为非常简单的保护电路。齐纳二极管U1限制Q1的栅极电压，R1限制通过U1的电流。Q1为n沟道MOSFET，配制成源极跟随器，栅极电压减去一个小的偏移电压后达到1-Wire从器件的IO电压。为维持完整的通信信号幅值，偏移电压应尽可能低。具有负偏压的耗尽型MOSFET非常适合这一应用。对SupertexDN3135进行测试，测得其偏压为-1.84V(数据资料参数VGS(OFF))。由此，要求栅极电压VG为3.16V，决定了U1的……

Abstract:Usingacurrent-senseamplifier,ahigh-sideMOSFETdriver,andalatchingvoltagemonitoracircuitcanbeeasilyconstructedthatprotectsfromovercurrentconditionsandoperatesatvoltagesashighas26V.Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSCIRCUITPROTECTIONKeywords:overvoltage,overcurrent,overvoltagecurrent,protection,set,trip,point,circuitbreaker,RS232,RS-232,rs232,USBSep11,1998APPLICATIONNOTE240OvercurrentMonitorOperatesupto26VAbstract:Usingacurrent-senseamplifier,ahigh-sideMOSFETdriver,andalatchingvoltagemonitoracircuitcanbeeasilyconstructedthatprotectsfromovercurrentconditionsandoperatesatvoltagesashighas26V.WidespreaduseoftheUniversalSerialBus(USB)hasledtoaselectionofovercurrent-protectioncircuitsforsupplyrailsinthe+2.7Vto+5.5Vrange,butfewproductsareavailableforvoltagesabovethatrange.ThecircuitbreakerinFigure1operatesonsupplyvoltages……

摘要：下面的讨论中介绍了Maxim的新的并行检测故障保护架构的优势超过传统的系列场效应管的方法。Maxim>AppNotes>SWITCHESANDMULTIPLEXERSKeywords:fault-protection,analogswitch,CMOSanalogmultiplexers,overvoltage,zenerclamp,parallelMar25,2001sense,seriesprotectiondiodes,faultprotectedswitches,analogmultiplexerAPPLICATIONNOTE745Fault-TolerantAnalogSwitchesAbstract:ThefollowingdiscussiondescribestheadvantagesofMaxim'snewparallelsensefault-protectionarchitectureoverthetraditionalseries-FETsapproach.Incertainapplications,boarddesignersaddcircuitrytoprotectanalog-switchinputsfromvoltagesthatexceedthesupplyrails.Whenthesevoltagesarepresent,notonlymusttheswitchsurvivethem,butalso―toprotectthecircuitrydownstreamfromtheswitch―thevoltagefromtheswitch'soutputmustremainwithinitssupplyrails.……

：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：了解µP主管来确保适当的系统操作期间通电、电源关闭和灯火情况（欠压监控）的价值。此外，提供有关过电压和窗口的监测信息。描述手动重置、看门狗定时器、备用电池和芯片启用浇注等附加功能。讨论需要多电压监测。Maxim>AppNotes>AUTOMOTIVEMICROPROCESSORSUPERVISORCIRCUITSKeywords:POR,poweronreset,uPreset,uPsupervisors,voltagemonitor,resettimeout,undervoltage,Sep01,2000overvoltage,monitoring,windowedreset,batterybackup,watchdogcircuit,microprocessorsupervisorsAPPLICATIONNOTE279SupervisoryCircuitsKeepYourMicroprocessorUnderControlAbstract:UnderstandthevalueofaPsupervisortoensurepropersystemoperationduringpower-up,power-down,andbrownoutsituations(undervoltagemonitoring).Inaddition,providesinformationaboutovervoltageandwindowedmonitoring.Describesadditionalfeaturessuchasmanualreset,watchdogtimer,batterybackup,andchipenablegating.Discussestheneedformulti-voltagemonitoring.Microprocessor-superviso……

：汽车电子系统组件如传感器和执行器需要保护反对过电压、瞬态电压及反向电压的条件。本应用指南空调ICs的格言传感器与讨论一些适合使用的离散的电路保护计划。Maxim>Designsupport>Appnotes>Automotive>APP760Maxim>Designsupport>Appnotes>CircuitProtection>APP760Maxim>Designsupport>Appnotes>Sensors>APP760Keywords:overvoltage,overvoltage,protection,automotive,reversevoltage,transientvoltage,sensors,actuators,vehicleelectronicsApr02,2002APPLICATIONNOTE760OvervoltageProtectioninAutomotiveSystemsAbstract:Vehicleelectronicssystemcomponentssuchassensorsandactuatorsrequireprotectionagainstovervoltage,transientvoltageandreversevoltageconditions.ThisapplicationnotediscussessomediscretecircuitprotectionschemessuitableforusewithMaximsensorcon……

摘要：以下应用笔记演示了一个简单的使用电荷泵和一个微处理器监控电路断开负载低的电源电压。该电路采用P沟道MOSFET断开负载从一个1.5V电源。Maxim/Dallas>AppNotes>BATTERYMANAGEMENTPOWER-SUPPLYCIRCUITSKeywords:lowvoltage,batterydisconnect,loaddisconnect,dc-dcconverter,overvoltage,dctodcconverters,Jul21,2003overvoltage,voltagemonitor,microprocessorsupervisorAPPLICATIONNOTE2237SimpleCircuitDisconnectsLoadfromLow-VoltageSupplyThefollowingapplicationnotedemonstratesasimplecircuitusingachargepumpandamicroprocessorsupervisortodisconnectalowvoltagesupplyfromaload.ThecircuitusesaP-channelMOSFETtodisconnecttheloadfroma1.5Vsupply.Powersuppliesoftenincludeacircuitthatdisconnectstheloadwhenthesupplyvoltagedropstoolow(whenabatteryisnearlydischarged,forexample).Ap-channelMOSFETconnectedbetweensupplyandloadisthety……

摘要：该电路保持电源的负载，无论在电源电压瞬间短路或打开，包括低电流过压保护IC（MAX6495的工作），保护负载免受瞬态电压高达72V。Maxim>AppNotes>CircuitProtectionProtectionandIsolationKeywords:automotiveelectronics,overvoltageprotection,brownoutprotection,ride-throughcapability,MOSFETsDec22,2010APPLICATIONNOTE4550AutomotiveProtectionCircuit"RidesThrough"Supply-VoltageInterruptionsand72VTransientsBy:RonaldMoradkhanAbstract:Thiscircuitmaintainspowertotheloadregardlessofmomentaryshortsoropensinthesupplyvoltage,andincludesalow-currentovervoltage-protectionIC(MAX6495)thatprotectstheloadagainsttransientvoltagesupto72V.AsimilarversionofthisarticleappearedintheNovember25,2007issueofMachineDesignmagazine.Manyapplicationsinautomotiveelectronicsrequireasupplyvoltagethatremainsuninterrupt……

摘要：许多汽车的机械功能已被取代或修订近年来的电子电路。一个结果已经在微控制器，每车的数量迅速增加，类似的增长来自汽车电池生产中的总电流。只要车电机运行和发电机运转正常，这个功耗是不是一个问题。Maxim>AppNotes>AUTOMOTIVECIRCUITPROTECTIONVOLTAGEREFERENCESKeywords:Quiescentcurrent-LoadDumpOvervoltagePulse-Feb09,2007APPLICATIONNOTE3928AutomotiveLinearRegulatorsMinimizeQuiescentCurrentAbstract:Manyautomotivemechanicalfunctionshavebeenreplacedoramendedbyelectroniccircuitsinrecentyears.Oneconsequencehasbeenarapidincreaseinthenumberofmicrocontrollerspercar,producingasimilarincreaseinthetotalcurrentdrawnfromthecarbattery.Aslongthecarmotorisrunningandthealternatorisoperatingproperly,thispowerconsumptionisnotaconcern.Whenyouturnoffthemotor,however,thecarbatterymustimmediatelydeliverallcurrentsdemandedbythevarioussubsystems:……

摘要：汽车电子系统部件，如传感器和执行器需要保护，防止过电压，瞬态电压和反向电压条件。本应用笔记讨论了一些离散的电路保护方案适合与Maxim的传感器信号调理IC。Maxim>Designsupport>Appnotes>Automotive>APP760Maxim>Designsupport>Appnotes>CircuitProtection>APP760Maxim>Designsupport>Appnotes>Sensors>APP760Keywords:overvoltage,overvoltage,protection,automotive,reversevoltage,transientvoltage,sensors,actuators,vehicleelectronicsApr02,2002APPLICATIONNOTE760OvervoltageProtectioninAutomotiveSystemsAbstract:Vehicleelectronicssystemcomponentssuchassensorsandactuatorsrequireprotectionagainstovervoltage,transientvoltageandreversevoltageconditions.ThisapplicationnotediscussessomediscretecircuitprotectionschemessuitableforusewithMaximsensorcon……

摘要：利用电流检测放大器，高边MOSFET驱动器，锁存电压监测电路可以很容易地构建免受过流条件和工作在高达26V的高电压。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSCIRCUITPROTECTIONKeywords:overvoltage,overcurrent,overvoltagecurrent,protection,set,trip,point,circuitbreaker,RS232,RS-232,rs232,USBSep11,1998APPLICATIONNOTE240OvercurrentMonitorOperatesupto26VAbstract:Usingacurrent-senseamplifier,ahigh-sideMOSFETdriver,andalatchingvoltagemonitoracircuitcanbeeasilyconstructedthatprotectsfromovercurrentconditionsandoperatesatvoltagesashighas26V.WidespreaduseoftheUniversalSerialBus(USB)hasledtoaselectionofovercurrent-protectioncircuitsforsupplyrailsinthe+2.7Vto+5.5Vrange,butfewproductsareavailableforvoltagesabovethatrange.ThecircuitbreakerinFigure1operatesonsupplyvoltages……