ESD Layout Guide - TI.com
1SLVA680 February2015SubmitDocumentationFeedbackC opyright 2015,TexasInstrumentsIncorporatedESDProt ectionLayoutGuideApplicationReportSLVA68 0 February2015ESDProtectionLayoutGuideGuy systemagainstelectrostaticdischarge(ESD) is largelydependenton the printedcircuitboard(PCB) propertransientvoltagesuppressor(TVS)fou ndsthe basisof an ESDprotectionstrategy,its scopeis not availableinTechnicalDocumentsat guidancein choosingthe correcttypeof TVSdiodefor properTVSselected,designinga PCBLayoutthat leveragesthe strategiesoutlinedin this ESDLayoutGuidewill providethe PCBdesignerwithan avenuetowardssuccessfullyprotectinga OptimizingDissipationof ESDeventrapidlyforcescurrent(seeFigure1) ,IESD, into a system,usuallythrougha userinterfacesuchas a cableconnection,or a humaninputdevicelike a key on a systemagainstESDusinga TVSreliesuponthe TVSbeingableto shuntIESDto PCBLayoutfor ESDsuppressionis largelydependanton designingthe pathto groundforIESDwith as littleimpedanceas ESDevent,the voltagepresentedto the protectedintegratedcircuit(ProtectedIC), VESD, is a functionofIE
Protected Line ESD Source Protected IC L1 L2 L3 L4 PCB Layout Guidelines for Optimizing Dissipation of ESD www.ti.com 4 SLVA680–February 2015 Submit Documentation Feedback
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