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时间: 2019-12-24 18:17
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摘要:该电路在高电压(48V和更高)使用一个标准的5V差分放大器(MAX4198)参照地面监视电流流。它还采用了增益调整数字电位器(MAX5402)。Maxim>AppNotes>AmplifierandComparatorCircuitsDigitalPotentiometersKeywords:high-voltagecurrentmonitors,differenceamplifiers,adjustablegain,pnptransistors,digitalpotentiometersDec21,2010APPLICATIONNOTE4546High-Voltage,Programmable-GainCurrentMonitorAbstract:Thiscircuitmonitorscurrentflowathighvoltage(48Vandhigher)usingastandard5Vdifferenceamplifier(MAX4198)referencedtoground.Italsoemploysadigitalpotentiometer(MAX5402)forgainadjustment.AsimilarversionofthisarticleappearedintheJune1,2007issueofPET.Telcom,LDMOS,automotive,andnumerousotherapplicationsrequirethemeasurementofcurrentflowathighvoltages(high-sidecurrent).Often,acircuitoperatingat5Vmustmonitor……