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3.1Short-CircuitProtectionandFault-ReportingCircuitry
3.2FaultReporting
Chapter3
SLEU071–June2006
Protection
Thischapterdescribestheshort-circuitprotectionandfault-reportingcircuitryofthe
TAS5142device.
TheTAS5142isaself-protectingdevicethatprovidesfaultreporting(includinghigh-temperature
protectionandshort-circuitprotection).TheTAS5142isconfiguredinback-endauto-recoverymodeand,
therefore,resetsautomaticallyafterallerrors(M1,M2,andM3aresetlow).Thismeansthatthedevice
willrestartitselfafteraerroroccasionandreportthroughtheSDerrorsignal.
TheOTWandSDoutputsfromtheTAS5142indicatefaultconditions.PleaserefertotheTAS5142Data
Manualforadescriptionofthesepins.
Table3-1.TAS5142Warning/ErrorSignalDecoding
OTWSDDEVICECONDITION
00High-temperatureerrorand/orhigh-currenterror
01High-temperaturewarning
10Undervoltagelockoutorhigh-currenterror
11Normaloperation,noerrors/warnings
ThetemperaturewarningsignalsattheTAS5508-5142K7EVMboardarewired-ORtoonetemperature
warningsignal(OTW–pin22incontrolinterfaceconnector).Shutdownsignalsarewired-ORintoone
shutdownsignal(SD–pin20incontrolinterfaceconnector).
Theshutdownsignals,togetherwiththetemperaturewarningsignal,givechipstateinformationas
describedinTable3-1.Devicefault-reportingoutputsareopen-drainoutputs.
SLEU071–June2006Protection15
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