LM384

LM384

5WAudioPowerAmplifier

GeneralDescription

TheLM384isapoweraudioamplifierforconsumerapplica-tions.Inordertoholdsystemcosttoaminimum,gainisin-ternallyfixedat34dB.Auniqueinputstageallowsgroundreferencedinputsignals.Theoutputautomaticallyself-centerstoone-halfthesupplyvoltage.

Theoutputisshort-circuitproofwithinternalthermallimiting.Thepackageoutlineisstandarddual-in-line.Acopperleadframeisusedwiththecenterthreepinsoneithersidecom-prisingaheatsink.Thismakesthedeviceeasytouseinstandardp-clayout.

Usesincludesimplephonographamplifiers,intercoms,linedrivers,teachingmachineoutputs,alarms,ultrasonicdriv-ers,TVsoundsystems,AM-FMradio,soundprojectorsys-tems,etc.SeeAN-69forcircuitdetails.

Features

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Widesupplyvoltagerange:12Vto26VLowquiescentpowerdrainVoltagegainfixedat50

Highpeakcurrentcapability:1.3AInputreferencedtoGND

Highinputimpedance:150kΩ

Lowdistortion:0.25%(PO=4W,RL=8Ω)

Quiescentoutputvoltageisatonehalfofthesupplyvoltage

nStandarddual-in-linepackage

SchematicDiagram

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©2000NationalSemiconductorCorporationDS007843www.national.com

LM384AbsoluteMaximumRatings(Note1)

IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Distributorsforavailabilityandspecifications.SupplyVoltagePeakCurrent

PowerDissipation(See(Notes4,5))InputVoltage

StorageTemperature

28V1.3A1.67W±0.5V

−65˚Cto+150˚C

OperatingTemperatureLeadTemperature(Soldering,10sec.)ThermalResistanceθJCθJA0˚Cto+70˚C

260˚C30˚C/W79˚C/W

Note1:AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsforwhichthede-viceisfunctional,butdonotguaranteespecificperformancelimits.

ElectricalCharacteristics(Note2)

SymbolZINIBIASAVPOUTIQVOUTQBWV

+Parameter

InputResistanceBiasCurrentGain

OutputPower

QuiescentSupplyCurrentQuiescentOutputVoltageBandwidthSupplyVoltage

ShortCircuitCurrent(Note6)PowerSupplyRejectionRatio(Note3))

TotalHarmonicDistortion

ConditionsInputsFloating

MinTyp150100

MaxUnitskΩnA

40

THD=10%,RL=8Ω

5

505.58.511

6025

V/VWmAVkHz

POUT=2W,RL=8Ω

12

450

26

1.331

VAdB

ISCPSRRRTOTHD

POUT=4W,RL=8Ω

0.251.0%

Note2:V+=22VandTA=25˚CoperatingwithaStaverV7heatsinkfor30seconds.Note3:RejectionratioreferredtotheoutputwithCBYPASS=5µF,freq=120Hz.Note4:ThemaximumjunctiontemperatureoftheLM384is150˚C.Note5:Thepackageistobederatedat15˚C/Wjunctiontoheatsinkpins.

Note6:Outputisfullyprotectedagainstashortedspeakerconditionatallvoltagesupto22V.

HeatSinkDimensions

Staver“V7”HeatSink

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StaverCompany41SaxonAve.P.O.DrawerHBayShore,N.Y.Tel:(516)666-8000

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LM384TypicalPerformanceCharacteristics

DeviceDissipationvsAmbientTemperature

ThermalResistancevsSquareInches

SupplyDecouplingvsFrequency

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TotalHarmonicDistortionvsOutputPower

OutputVoltageGainvsFrequencyTotalHarmonicDistortionvsFrequency

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PowerSupplyCurrentvsSupplyVoltage

DeviceDissipationvs

OutputPower—16ΩLoad

DeviceDissipationvsOutputPower—8ΩLoad

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LM384TypicalPerformanceCharacteristics

DeviceDissipationvsOutputPower—4ΩLoad

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BlockandConnectionDiagrams

Dual-In-LinePackage

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Note7:HeatsinkPins

TopView

OrderNumberLM384NSeeNSPackageNumberN14A

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LM384TypicalApplications

Typical5WAmplifier

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BridgeAmplifier

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Intercom

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*Forstabilitywithhighcurrentloads

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LM384TypicalApplications

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PhaseShiftOscillator

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LM3845WAudioPowerAmplifierPhysicalDimensions

inches(millimeters)unlessotherwisenoted

MoldedDual-In-LinePackage(N)

OrderNumberLM384NNSPackageNumberN14A

LIFESUPPORTPOLICY

NATIONAL’SPRODUCTSARENOTAUTHORIZEDFORUSEASCRITICALCOMPONENTSINLIFESUPPORTDEVICESORSYSTEMSWITHOUTTHEEXPRESSWRITTENAPPROVALOFTHEPRESIDENTANDGENERALCOUNSELOFNATIONALSEMICONDUCTORCORPORATION.Asusedherein:1.Lifesupportdevicesorsystemsaredevicesorsystemswhich,(a)areintendedforsurgicalimplantintothebody,or(b)supportorsustainlife,andwhosefailuretoperformwhenproperlyusedinaccordancewithinstructionsforuseprovidedinthelabeling,canbereasonablyexpectedtoresultinasignificantinjurytotheuser.

NationalSemiconductorCorporationAmericas

Tel:1-800-272-9959Fax:1-800-737-7018Email:support@nsc.com

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NationalSemiconductorEurope

Fax:+49(0)180-5308586Email:europe.support@nsc.com

DeutschTel:+49(0)6995086208EnglishTel:+44(0)8702402171FrançaisTel:+33(0)141918790

2.Acriticalcomponentisanycomponentofalifesupportdeviceorsystemwhosefailuretoperformcanbereasonablyexpectedtocausethefailureofthelifesupportdeviceorsystem,ortoaffectitssafetyoreffectiveness.

NationalSemiconductorAsiaPacificCustomerResponseGroupTel:65-24466Fax:65-2504466

Email:ap.support@nsc.com

NationalSemiconductorJapanLtd.

Tel:81-3-5639-7560Fax:81-3-5639-7507

Nationaldoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandNationalreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications.