标签: current-sense

LT6100和LT6101高压侧电流检测放大器简化汽车环境设计，高瞬态电压容限和地参考输出使其相对传统解决方案来说，可增强稳定性并极大地减少所需元件数量。MonitorandProtectAutomotiveSystemswithIntegratedCurrentSensing……

Abstract:Current-senseamplifiersnormallyoperatewellaboveground,butafaultconditioncandrivethesenseinputsbelowground,damagingthedevicebydrawingexcessivecurrentthroughtheESD-protectiondiodes.Thiscircuitprotectsaparticularhigh-sidecurrent-senseamplifier(MAX4080)byconnectingPMOSblockingtransistorsinserieswitheachinput.Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP4837Maxim>Designsupport>Appnotes>CircuitProtection>APP4837Keywords:current-senseamplifiers,negativefaultvoltage,ESD-protectiondiodesFeb09,2011APPLICATIONNOTE4837ProtectCurrent-SenseAmplifiersfromNegativeOvervoltageBy:ArpitMehta,StrategicApplicationsEngineerPrashanthHolenarsipurAbstract:Current-senseamplifiersnormallyoperatewellaboveground,butafaultconditioncandrivethesenseinputsbelowground,damagingthedevicebydrawingexcessivecurrentthroughtheESD-protectiondiodes.Thiscircuitprotectsaparticularhigh-sidecurrent-sense……

Abstract:ThiscircuitexploitsallthepoweravailablefromaUSBportbydynamicallyadjustingtheamountofcurrentdeliveredtotheload,therebysiphoningarelativelyconstant(andmaximum)currentfromtheUSBport.Includedareacurrent-senseamplifier(MAX4173),voltagereference(MAX6129),andprecisionopamp(MAX4238).Maxim>AppNotes>AmplifierandComparatorCircuitsInterfaceCircuitsVoltageReferencesKeywords:USBports,USB-portpower,current-senseamplifiers,voltagereferences,opamps,n-channelMOSFETsJan05,2011APPLICATIONNOTE4563DynamicSiphonStealsCurrentfromUSBPortAbstract:ThiscircuitexploitsallthepoweravailablefromaUSBportbydynamicallyadjustingtheamountofcurrentdeliveredtotheload,therebysiphoningarelativelyconstant(andmaximum)currentfromtheUSBport.Includedareacurrent-senseamplifier(MAX4173),voltagereference(MAX6129),andprecisionopamp(MAX4238).AsimilarversionofthisarticleappearedintheDecmeber15,2006issueofEDNmagazine.USBportscanbeahandysourceof5Vpower.NotonlycanaUSBportpowera……

Abstract:Youcanshutdownacurrent-senseamplifierbyconnectinganNMOStransistorinitsgroundpathanddrivingitwithlogic-levelsignalscapableofturningthetransistorONandOFF.WhenONtheamplifieroperatesnormally,butwhenOFFitshutsdownbecauseitsgroundisfloating.Maxim>AppNotes>AmplifierandComparatorCircuitsKeywords:current-senseamplifiers,batteryoperation,NMOStransistors,shutdownDec10,2010APPLICATIONNOTE4544ShutDownaCurrent-SenseAmplifierviaItsSupplyPinsBy:ArpitMehtaPrashanthHolenarsipurAbstract:Youcanshutdownacurrent-senseamplifierbyconnectinganNMOStransistorinitsgroundpathanddrivingitwithlogic-levelsignalscapableofturningthetransistorONandOFF.WhenONtheamplifieroperatesnormally,butwhenOFFitshutsdownbecauseitsgroundisfloating.AsimilarversionofthisarticleappearedintheNovember11,2007issueofPowerElectronicsTechnologymagazine.Unliketraditionalopamps,thehigh-sidecurrent-senseamplifierdoesn'tincludea……

Abstract:Usingatransistorasshown,youcandoubletheallowedvoltagelimitonacurrent-senseamplifierbystackingtwosuchamplifiersoneupontheother.Thevoltagesignalfromthebottomamplifierthenrepresentscurrentasthevoltageacrossthesenseresistor,timestheproductofthegainsofthetwoamplifiers.Maxim>AppNotes>AmplifierandComparatorCircuitsKeywords:high-sidecurrent-senseamplifiers,npntransistors,maximumoperatingvoltageNov29,2010APPLICATIONNOTE4517ExtendRangeofCurrent-SenseAmplifiersAbstract:Usingatransistorasshown,youcandoubletheallowedvoltagelimitonacurrent-senseamplifierbystackingtwosuchamplifiersoneupontheother.Thevoltagesignalfromthebottomamplifierthenrepresentscurrentasthevoltageacrossthesenseresistor,timestheproductofthegainsofthetwoamplifiers.AsimilarversionofthisarticleappearedintheMay1,2008issueofPowerElectronicsTechnologymagazine.High-sidecurrent-senseamplifiersarerelativelyinexpensivedevicesthatsense……

Abstract:Theprecisioncurrentmirrorsshownallowyoutotransformonetypeof4–20mAtransmittertoanother,ortocreatearepeaterforthepurposeofextendingthelengthofthecurrentloop.Thecircuitsincludeaninput-sink/output-sinkmirrorandaninput-source/output-sourcemirror.Maxim>AppNotes>AmplifierandComparatorCircuitsKeywords:4-20mAtransmitters,precisioncurrentmirrors,current-senseresistorratiosNov11,2010APPLICATIONNOTE4508PrecisionCurrent-Sink/SourceCircuitsConfigureasMirrorsorAmplifiersAbstract:Theprecisioncurrentmirrorsshownallowyoutotransformonetypeof4……

Abstract:Thiscircuitletsyouprogramacurrentlimitwithoutusingmicrocontrollersordataconverters.Itconsistsofacharge-pumpvoltagedoubler(U1),acurrent-senseamplifier(U2),andtwon-channelMOSFETs.Thesense-resistorvaluedeterminesthemaximumcurrentlimit.Maxim>AppNotes>AmplifierandComparatorCircuitsPower-SupplyCircuitsKeywords:charge-pumpvoltagedoublers,current-senseamplifiers,n-channelMOSFETs,inrushcurrentNov05,2010APPLICATIONNOTE4501SimpleCurrentLimiterIsProgrammableAbstract:Thiscircuitletsyouprogramacurrentlimitwithoutusingmicrocontrollersordataconverters.Itconsistsofacharge-pumpvoltagedoubler(U1),acurrent-senseamplifier(U2),andtwon-channelMOSFETs.Thesense-resistorvaluedeterminesthemaximumcurrentlimit.AsimilarversionofthisarticleappearedintheMay18,2009issueofEETimesmagazine.Availableintegratedcircuitscanletyouprogramacurrentlimit,buttheygenerallyinvolvemicrocontrollersordataconve……

摘要：添加一个电荷泵提供±5V电源轨运算放大器的内部高边电流检测放大器。这一修改使该放大器感应电流下降到0V的共模输入。可以修改，以适应双向电流检测应用电路。Maxim>AppNotes>AmplifierandComparatorCircuitsPower-SupplyCircuitsKeywords:current-senseamplifier,chargepump,opamp,bidirectionalcurrentsensingSep20,2007APPLICATIONNOTE4078ExtendCurrent-SenseAmplifier'sInputRangeDownto0VAbstract:Addingachargepumpprovides±5Vsupplyrailstotheoperationalamplifierinternaltoahigh-sidecurrent-senseamplifier.Thismodificationenablesthatamplifiertosensecurrentsdownto0Vcommon-modeinputs.Thecircuitcanbemodifiedtoaccommodatebidirectionalcurrent-senseapplications.AsimilararticleappearedintheFebruary15,2007issueofElectronicDesignmagazine.Inadditiontothetraditionallead-acidbattery,modernelectric/hybridcarsoftenincludealargecapacit……

摘要：该电路修改一个标准的32V高侧电流监视器来测量负载电流（至30mA），同时可容纳任何高电压水平，受外部元件的限制。（显示组件允许测量到4A。）Maxim>AppNotes>AmplifierandcomparatorcircuitsMeasurementcircuitsPower-supplycircuitsKeywords:high-sidecurrentsensing,highvoltage,current-senseamplifiersAug30,2004APPLICATIONNOTE3331High-SideCurrent-SenseAmplifierOperatesatHighVoltageAbstract:Thiscircuitmodifiesastandard32Vhigh-sidecurrentmonitortomeasureloadcurrent(to30mA)whileaccommodatinganylevelofhighvoltage,subjecttolimitationsintheexternalcomponents.(Thecomponentsshownallowmeasurementsto4A.)Thesimplesttechniqueformeasuringcurrentinanactuatorormotoristomonitoritsgroundcurrentbysensingthevoltagedropacrossasmallresistiveelement,addedbetweentheloadandground.Becausethedeviceanditsasso……

MAX4211F）跨负载，感官的通过电流和电压和用品在其产出（撅嘴模样）电压成正比的这些变量，连续的产品之一即成比例的负载瞬时功率。外部放大器生成控制p通道MOSFET负荷系列中的相应PWM（脉冲宽度调制）输出信号。Maxim>AppNotes>AmplifierandComparatorCircuitsCircuitProtectionKeywords:constant-powerdrivers,resistiveloads,chopped-DCdrive,opamps,analogmultipliers,current-senseamplifiersNov29,2010APPLICATIONNOTE4523Constant-PowerDriverIsSimple,Efficient,andInexpensiveAbstract:Acombinationcurrent-senseamplifierandmultiplier(MAX4211F)sensesboththecurrentthroughandvoltageacrosstheload,andsuppliesatoneofitsoutputs(POUT)avoltageproportionaltothecontinuousproductofthosevariables,i.e.,proportionaltotheload'sinstantaneouspower.ExternalopampsgenerateacorrespondingPWM(pulsewidthmodulated)outputsignalthatcontrolsap-channelMOSFETinserieswiththeload.Asimilarversionofthisarticl……

一种类型的4–20mA发射机到另一个，或创建直放站延长当前循环的目的。电路包括一个输入接收器输出接收器的镜子和一个输入源输出源的镜子。Maxim>AppNotes>AmplifierandComparatorCircuitsKeywords:4-20mAtransmitters,precisioncurrentmirrors,current-senseresistorratiosNov11,2010APPLICATIONNOTE4508PrecisionCurrent-Sink/SourceCircuitsConfigureasMirrorsorAmplifiersAbstract:Theprecisioncurrentmirrorsshownallowyoutotransformonetypeof4……

倍增器，MAX4211显示可以方便地测量功率消散在负载。一个乘数输入连接到负载电压和其他内部模拟负载电流的——就是成比例的电压产生的内部电流检测放大器。乘数输出（VLIL），然后是负载功率成正比的电压。Maxim>AppNotes>AmplifierandComparatorCircuitsKeywords:high-sidecurrent-senseamplifiers,analogvoltagemultipliers,load-powermonitors,A/Dconverters,voltagereferencesNov08,2010APPLICATIONNOTE4507Load-PowerMonitorImprovesHigh-SideCurrentMeasurementsBy:MaurizioGavardoniAbstract:Combiningahigh-sidecurrent-senseamplifierwithananalogvoltagemultiplier,MAX4211showncaneasilymeasurethepowerdissipatedinaload.Onemultiplierinputconnectstotheloadvoltage,andtheothertoaninternalanalogoftheloadcurrent―thatis,aproportionalvoltageproducedbytheinternalcurrent-senseamplifier.Themultiplieroutput(VLIL)isthenavoltageproportionaltoloadpower.AsimilarversionofthisarticleappearedintheAugust1,2008issue……

测放大器，MAX4211显示，可以很容易地测量负载消耗的功率。一个乘法器输入连接到负载电压，负载电流是内部模拟，成比例的电压由内部的电流检测放大器。乘法器的输出（VLIL）是成正比的电压，负载功率。Maxim>AppNotes>AmplifierandComparatorCircuitsKeywords:high-sidecurrent-senseamplifiers,analogvoltagemultipliers,load-powermonitors,A/Dconverters,voltagereferencesNov08,2010APPLICATIONNOTE4507Load-PowerMonitorImprovesHigh-SideCurrentMeasurementsBy:MaurizioGavardoniAbstract:Combiningahigh-sidecurrent-senseamplifierwithananalogvoltagemultiplier,MAX4211showncaneasilymeasurethepowerdissipatedinaload.Onemultiplierinputconnectstotheloadvoltage,andtheothertoaninternalanalogoftheloadcurrent―thatis,aproportionalvoltageproducedbytheinternalcurrent-senseamplifier.Themultiplieroutput(VLIL)isthenavoltageproportionaltoloadpower.AsimilarversionofthisarticleappearedintheAugust1,2008issue……

摘要：本应用笔记帮助系统设计师使用MAX16948双远程天线的LDO/开关选择正确的外部元件，从而确保汽车调节幻象天线电源和输出电流监测电路满足性能目标。提供电子计算器，帮助指定为MAX16948的关键外部元件，从而减少了设计时间。计算器也决定了设备的模拟输出电压，输出电流限制阈值，输出电流检测精度。计算器，包括新的自动步步功能元件的选择，协助设计师。使用新的自动功能，点击Step按钮所需的部分相对的步骤。Maxim>DesignSupport>TechnicalDocuments>ApplicationNotes>Automotive>APP5271Maxim>DesignSupport>TechnicalDocuments>ApplicationNotes>Power-SupplyCircuits>APP5271Keywords:automotive,automotiveantennaprotector,phantompower,activeantenna,activeantennapowerprotector,phantompowerantennaprotector,automotiveantenna,LDO,LNA,lowdropoutlinearregulator,current-sense,remoteantennadiagnosticJan03,2012APPLICATIONNOTE5271SelectingExternalComponentsforanAutomotiveDualRemoteAntennaCurrent-SenseLDO/SwitchBy:AndreaLongobardiJan03,2012Abstract:Thisapplicationnotehelpssystemdesignerschoosethecorrectext……

摘要：超低电阻表面安装电流检测电阻像理想的包。物理设计，皮带的金属，似乎理想，提供可能的最低电感。往往这些电阻需要某种形式的电阻电容筛选以限制开关噪声峰值。问题是分流器的时间常数是除以回路电阻的包电感。因此，低分流电阻、越长衰变倍。Maxim>AppNotes>BATTERYMANAGEMENTPOWER-SUPPLYCIRCUITSKeywords:currentsense,resistor,surfacemount,currentshunt,current-senseresistors,shuntresistanceDec27,2001APPLICATIONNOTE908Ultra-LowResistanceSurfaceMountCurrentShuntsAbstract:Ultra-lowresistancesurfacemountcurrent-senseresistorsseemliketheidealpackage.Thephysicaldesign,astrapofmetal,seemsideal,offeringthelowestinductancepossible.Toooftentheseresistorsneedsomekindofresistorcapacitorfiltertolimittheswitchingnoisespikes.Theproblemisthatthetimeconstantfortheshuntisthepackageinductancedividedbythecircuitresistance.Consequently,thelowertheshuntresistance,thelongerthedecaytimes.Ultra-lowresistancesurfacemountcurrent-sens……

摘要：超低电阻表面贴装电流感应电阻看起来就像理想的包。物理设计，金属表带，似乎很理想，提供尽可能最低的电感。往往这些电阻需要一些电阻电容滤波器来限制开关噪声尖峰。问题是，分流器的时间常数除以电路的电阻，封装电感。因此，分流电阻低，时间越长，衰减时间。Maxim>AppNotes>BATTERYMANAGEMENTPOWER-SUPPLYCIRCUITSKeywords:currentsense,resistor,surfacemount,currentshunt,current-senseresistors,shuntresistanceDec27,2001APPLICATIONNOTE908Ultra-LowResistanceSurfaceMountCurrentShuntsAbstract:Ultra-lowresistancesurfacemountcurrent-senseresistorsseemliketheidealpackage.Thephysicaldesign,astrapofmetal,seemsideal,offeringthelowestinductancepossible.Toooftentheseresistorsneedsomekindofresistorcapacitorfiltertolimittheswitchingnoisespikes.Theproblemisthatthetimeconstantfortheshuntisthepackageinductancedividedbythecircuitresistance.Consequently,thelowertheshuntresistance,thelongerthedecaytimes.Ultra-lowresistancesurfacemountcurrent-sens……

摘要：电流检测放大器通常远高于地面操作，但故障条件下可以推动地面以下的感觉输入，绘制通过ESD保护二极管的电流过大损坏设备。该电路保护系列晶体管，每个输入连接PMOS管阻塞特定的高边电流检测放大器（MAX4080）。Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP4837Maxim>Designsupport>Appnotes>CircuitProtection>APP4837Keywords:current-senseamplifiers,negativefaultvoltage,ESD-protectiondiodesFeb09,2011APPLICATIONNOTE4837ProtectCurrent-SenseAmplifiersfromNegativeOvervoltageBy:ArpitMehta,StrategicApplicationsEngineerPrashanthHolenarsipurAbstract:Current-senseamplifiersnormallyoperatewellaboveground,butafaultconditioncandrivethesenseinputsbelowground,damagingthedevicebydrawingexcessivecurrentthroughtheESD-protectiondiodes.Thiscircuitprotectsaparticularhigh-sidecurrent-sense……

摘要：双方目前的组合电流检测放大器和倍增器（MAX4211F）感官和负载两端的电压，其输出（POUT的）电压成正比，即这些变量的连续产品的供应，成正比负载的瞬时功率。外部运算放大器产生相应的PWM（脉宽调制）输出信号，控制与负载串联p沟道MOSFET。Maxim>AppNotes>AmplifierandComparatorCircuitsCircuitProtectionKeywords:constant-powerdrivers,resistiveloads,chopped-DCdrive,opamps,analogmultipliers,current-senseamplifiersNov29,2010APPLICATIONNOTE4523Constant-PowerDriverIsSimple,Efficient,andInexpensiveAbstract:Acombinationcurrent-senseamplifierandmultiplier(MAX4211F)sensesboththecurrentthroughandvoltageacrosstheload,andsuppliesatoneofitsoutputs(POUT)avoltageproportionaltothecontinuousproductofthosevariables,i.e.,proportionaltotheload'sinstantaneouspower.ExternalopampsgenerateacorrespondingPWM(pulsewidthmodulated)outputsignalthatcontrolsap-channelMOSFETinserieswiththeload.Asimilarversionofthisarticl……

摘要：该电路提供了一个4-20mA电流环路灵活的故障保护。此外，它包括为恢复环路上施加的数字信号（如HART协议）的电路。Maxim/Dallas>AppNotes>CIRCUITPROTECTIONINTERFACECIRCUITSKeywords:4-20mAcurrentloop,faultprotection,currentlimiting,current-senseamplifiersApr22,2004APPLICATIONNOTE3195AddFaultProtectionto4-20mALoopSupplyThiscircuitprovidesflexiblefaultprotectionfora4-20mAcurrentloop.Inaddition,itincludescircuitryforrecoveringdigitalsignals(suchastheHARTprotocol)imposedontheloop.4-20mAcurrentloopsconsistofapowersourceandcurrent-measuringdeviceatthecontrolend,andafieldtransmitterthatsensesprocess-variableinformation(liketemperatureorpressure)andconvertsittoacurrent(Figure1).Most4-20mAindustrialloopsarepoweredby24VDC,butthatvoltagecanrangefrom12Vto36V.Theloopvoltageino……