Transcription of Managing Inrush Current (Rev. A)
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Managing Inrush Current (Rev. A)
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?
compared to its integrated counterpart, the load switch, it requires more components and a much larger solution size. By contrast, the most integrated solution is the DC/DC converter or voltage regulator with soft-start already built in. Despite its integration, adding load switches may be more beneficial for the system.
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