Simple Current Limiter Is Programmable

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