新增高电压能力的MAX471/MAX472高侧电流检测放大器

摘要：雪崩二极管和电流源提供一个浮动的电源，使高边电流检测放大器工作在高达300V。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUTOMOTIVEKeywords:highvoltage,currentsenseamp,currentmonitor,amplifier,high-side,currentsenseamplifiers,Mar14,2003ampsAPPLICATIONNOTE1934AddHighVoltageCapabilitytotheMAX471/MAX472High-SideCurrentSenseAmplifiersAbstract:Anavalanchediodeandcurrentsourceprovideafloatingpowersupplytoallowhigh-sidecurrentsenseamplifierstoworkatupto300V.TheMAX471andMAX472arecompletebi-directionalhigh-sidecurrentsenseamplifiersforportablePCs,telephones,andothersystemswherebattery/DClinemonitoringisimportant,andwheregroundcontinuitybetweensystemandsupplyiscrucial.However,thepart's36Vmaximumoperatingvoltageisalimitingfactorwhenhighervoltage