Texas Instruments LM5068 Bedienungsanleitung

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LM5068

www.ti.com

SNVS254C–JANUARY2004–REVISEDMARCH2013

LM5068NegativeVoltageHotSwapController

CheckforSamples:LM5068

1

FEATURES

DESCRIPTION

TheLM5068hot-swapcontrollerprovidesintelligent

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•SafeModuleInsertionandRemovalfromLive

controlofpowersupplyconnectionsduringthe

Backplanes

insertionandremovalofcircuitcardspoweredbylive

•In-RushCurrentLimitingforSafeBoard

systembackplanes.

InsertionintoLiveBackplanes

TheLM5068providesbothin-rushcurrentcontroland

•FastResponsetoOver-CurrentFault

short-circuitprotectionfunctions,andlimitspower

ConditionswithActiveCurrentLimiting

supplytransientsinthebackplanecausedbythe

•-10Vto-90VInputRange

insertionofadditionalcircuitcards.TheLM5068

controlstheexternalN-ChannelMOSFETtoprovide

•ProgrammableUnder-Voltage/Over-Voltage

programmableloadcurrentlimitingandcircuit

ShutdownProtectionwithAdjustable

breakerfunctionsusingasingleexternalcurrent

Hysteresis

senseresistor.TheLM5068issuesapowergood

•ProgrammableMulti-FunctionTimerforBoard

(PWRGD)signalattheconclusionofasuccessful

InsertionDe-BounceDelay

power-onsequence.Inputover-voltageorunder-

voltagefaultconditionswillcancelthePWRGD

•FaultTimerAvoidsNuisanceTripsCausedby

indication.

ShortDurationLoadTransients

•ActiveGateClampingDuringInitialPower

TheLM5068-1and-2indicatepower-goodasan

open-drainactiveHIGHPWRGDstate.TheLM5068-

Application

3and-4indicatepower-goodasanopen-drainactive

•AvailableinbothLatchedFaultandAutomatic

LOWPWRGDstate.TheLM5068-1and-3latchoff

Re-TryVersions

afterafaultconditionisdetectedwhiletheLM5068-2

•AvailablewitheitherActiveHIGHorActive

and-4continuouslyre-tryatintervalssetbya

LOWPowerGoodFlag

programmabletimer.

TheLM5068isavailableinaVSSOP-8package.

APPLICATIONS

•-48VPowerModules

•CentralOfficeSwitching

•DistributedPowerSystems

•ElectronicCircuitBreaker

•PBXSystems

•NegativePowerSupplyControl

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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2004–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Produktspezifikationen