Circuit Guards Amplifier Outputs Against Overvoltage

Abstract:Toprotectaudioamplifiersandotherautomotiveelectroniccircuitsintheeventofanaccidentaldirectconnectiontothecarbatteryvoltage,addthecircuitryshown(ashuntregulator,diodes,andann-channelMOSFETinserieswitheachaudiopath).Maxim>AppNotes>AmplifierandComparatorCircuitsAudioCircuitsAutomotiveCircuitProtectionKeywords:automotivevoltageprotection,dualn-channelMOSFETs,shuntregulators,classABamplifiersJan06,2011APPLICATIONNOTE4555CircuitGuardsAmplifierOutputsAgainstOvervoltageAbstract:Toprotectaudioamplifiersandotherautomotiveelectroniccircuitsintheeventofanaccidentaldirectconnectiontothecarbatteryvoltage,addthecircuitryshown(ashuntregulator,diodes,andann-channelMOSFETinserieswitheachaudiopath).AsimilarversionofthisarticleappearedintheJuly7,2007issueofEDNmagazine.Auniversalrequirementforautomotiveelectronicsisthatanydevicewithdirectconnectionstothewiringharnessmustbeabletowith