高边电流检测放大器工作在高电压

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