Transcription of Managing Inrush Current (Rev. A) - TI.com
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Managing Inrush Current (Rev. A) - TI.com
ApplicationReportSLVA670A August2014 RevisedMay 2015 ManagingInrushCurrentAlek Kakneviciusand LoadSwitchesABSTRACTIn mostsystems,capacitorsare placedthroughouta designto ensurethereare no voltagedropson initiallyappliedto the system,chargingthesecapacitorscan resultin aninrushcurrentwhichcan exceedthe nominalload left unaddressed,this can causevoltagerailsto fall out of regulation,resultingin the systementeringan ,the inrushcurrentcan exceedthe currentcarryingcapabilityof boardconnectorsas wellas PCBtraces,resultingindamagingthe connectorsand be mitigatedby loadswitchesin theTPS229xxfamilyare slewrate controlledto applicationnoteexplorestypicalcausesof inrushcurrent,problemscausedby inrushcurrent,and solutionsfor inrushcurrentfeaturingintegratedload InrushCurrent?.. "Soft-start or Disadvantagesof Usinga August2014 RevisedMay 2015 ManagingInrushCurrentSubmitDocumentation FeedbackCopyright 2014 2015,TexasInstrumentsIncorporatedINRUSHL OADdVICdt= LoadLoadLoadPower SupplyWhatis InrushCurrent?
3.3 Integrated Load Switches Integrated load switches can be used in place of the discrete solution discussed in Section 3.2. All Texas Instruments load switches (TPS229xx products) feature a controlled output slew rate to mitigate inrush current. Figure 6 below shows the typical application circuit for a load switch. Figure 6.
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