AVAGO光耦内置的IGBT保护功能

AVAGO光耦内置的IGBT保护功能DesaturationFaultDetectionOptocouplerGateDriveProductwithFeature:ACPL-332J,ACPL-331JandHCPL-316JApplicationNote53241.Introductionii.Softturn-offDesaturationfaultdetectioncircuitprovidesprotectionThisfeatureexistsinAvagogateoptocoupler,(e.g.ACPL-forpowersemiconductorswitches(IGBTorMOSFETs)332J,ACPL-331JandHCPL-316J).Whenfaultisdetectedagainstshort-circuitcurrenteventswhichmayleadtobytheDESATfeature,aweakpull-downdeviceinthedestructionofthesepowerswitches.Thisdesaturationoutputdrivestagewillturnonto‘softly’turnofftheIGBToftheinverterscanalsooccurduetoaninsufficientandpreventslargedi/dtinducedvoltages.Thisd