TheTC4420/4429are6Ahigh-speedMOSFETdriversavailablein
an8-pinSOICpackage,8-pinCerDIPandPDIPpackages,anda
5-pinTO-220package.Thesepartshaveadditionalimprovements
overtheTC429driver.Addedfeaturesare4kVofESDprotection,
latch-upprotectionof>1.5Aofreverseoutputcurrent,andlogic
inputsthatcanwithstandupto5Vnegativeswings.Although
designedasapowerMOSFETdriver,itcanactasalevelshifter,
comparator,waveshaperandpulsetransformerdriver,tomention
afewofitspossibleuses.
SomeoftheothernotableparametersoftheTC4420/4429areits
excellentnoiseimmunityduetoaSchmitttriggerinputandCMOS
construction,itsminimalquiescentcurrentdraw(withitsinputinthe
lowstateitconsumeslessthan150µA),anditsriseandfalltimeare
matchedandaretypically25nsecat25°Cintoa2,500pFload.
DuetotheirlowcurrentCMOSinputs,theTC4420/4429donot
needspeedupcapacitorsontheirinputs.Theseinputsalsohave
theabilitytoacceptanyamplitudesignalfromnegative5Vtothe
supplyvoltage.AN798TC4420/4429UniversalPowerMOSFETInterfaceICSinceaMOSFETactuallyappearsasavariablecapacitanceasitAuthor:RonVinsant,turnsonandoff,itishardtosayexactlywhattheriseandfalltimesMicrochipTechnology,Inc.ofthedriveraregoingtobeforanyparticularcircuit.Inordertosimplifythemeasuringmethodwechoosea
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