LM3886

LM3886

Overture™AudioPowerAmplifierSeries

High-Performance68W

AudioPowerAmplifierw/Mute

GeneralDescription

TheLM3886isahigh-performanceaudiopoweramplifier

capableofdelivering68Wofcontinuousaveragepowertoa

4Ωloadand38Winto8Ωwith0.1%(THD+N)from

20Hz–20kHz.

TheperformanceoftheLM3886,utilizingitsSelfPeakIn-

stantaneousTemperature(˚Ke)(SPiKe™)ProtectionCir-

cuitry,putsitinaclassabovediscreteandhybridamplifiers

byprovidinganinherently,dynamicallyprotectedSafeOper-

atingArea(SOA).SPiKeProtectionmeansthattheseparts

arecompletelysafeguardedattheoutputagainstovervolt-

age,undervoltage,overloads,includingshortstothesup-

plies,thermalrunaway,andinstantaneoustemperature

peaks.

TheLM3886maintainsanexcellentSignal-to-NoiseRatioof

greaterthan92dBwithatypicallownoisefloorof2.0µV.It

exhibitsextremelylow(THD+N)valuesof0.03%atthe

ratedoutputintotheratedloadovertheaudiospectrum,and

providesexcellentlinearitywithanIMD(SMPTE)typicalrat-

ingof0.004%.

Features

n68Wcont.avg.outputpowerinto4ΩatVCC=±28Vn38Wcont.avg.outputpowerinto8ΩatVCC=±28V

n50Wcont.avg.outputpowerinto8ΩatVCC=±35V

n135Winstantaneouspeakoutputpowercapability

nSignal-to-NoiseRatio≥92dB

nAninputmutefunction

nOutputprotectionfromashorttogroundortothe

suppliesviainternalcurrentlimitingcircuitry

nOutputover-voltageprotectionagainsttransientsfrom

inductiveloads

nSupplyunder-voltageprotection,notallowinginternal

biasingtooccurwhen|VEE|+|VCC|≤12V,thus

eliminatingturn-onandturn-offtransients

n11-leadTO-220package

Applications

nComponentstereo

nCompactstereo

nSelf-poweredspeakers

nSurround-soundamplifiers

nHigh-endstereoTVs

TypicalApplication

Overture™andSPiKe™ProtectionaretrademarksofNationalSemiconductorCorporation.DS011833-1

*Optionalcomponentsdependentuponspecificdesignrequirements.RefertotheExternalComponentsDescriptionsectionforacomponentfunctionaldescription.

FIGURE1.TypicalAudioAmplifierApplicationCircuitMay1999LM3886

Overture

Audio

Power

Amplifier

Series

High-Performance

68W

Audio

Power

Amplifierw/Mute

©1999NationalSemiconductorCorporationDS011833www.national.comConnection

Diagram

PlasticPackage

(Note12)

DS011833-2

Note1:Preliminary:callyoulocalNationalSalesRep.ordistributorforavailability

TopView

OrderNumberLM3886T

orLM3886TF

SeeNSPackageNumberTA11Bfor

StaggeredLeadNon-Isolated

PackageorTF11B(Note1)for

StaggeredLeadIsolatedPackage

www.national.com2Absolute

MaximumRatings(Notes

6,

5)

IfMilitary/Aerospacespecifieddevicesarerequired,

pleasecontacttheNationalSemiconductorSalesOffice/

Distributorsforavailabilityandspecifications.

SupplyVoltage|V+|+|V−|(NoSignal)94V

SupplyVoltage|V+|+|V−|(InputSignal)84V

CommonModeInputVoltage(V+orV−)and|V+|+|V−|≤80V

DifferentialInputVoltage(Note16)60V

OutputCurrentInternallyLimited

PowerDissipation(Note7)125WESDSusceptibility(Note8)3000V

JunctionTemperature(Note9)150˚C

SolderingInformation

TPackage(10seconds)260˚C

StorageTemperature−40˚Cto+150˚C

ThermalResistance

θJC1˚C/W

θJA43˚C/W

OperatingRatings(Notes5,6)

TemperatureRange

TMIN≤TA≤TMAX−20˚C≤TA≤+85˚C

SupplyVoltage|V+|+|V−|20Vto84V

ElectricalCharacteristics(Notes5,6)

ThefollowingspecificationsapplyforV+=+28V,V−=−28V,IMUTE=−0.5mAwithRL=4Ωunlessotherwisespecified.LimitsapplyforTA=25˚C.

SymbolParameterConditionsLM3886Units(Limits)Typical(Note10)Limit(Note11)

|V+|+|V−|PowerSupplyVoltage(Note14)Vpin7−V−≥9V1820

84V(min)

V(max)

AMMuteAttenuationPin8Openorat0V,Mute:On

CurrentoutofPin8>0.5mA,

Mute:Off11580dB(min)

PO(Note4)OutputPower(ContinuousAverage)THD+N=0.1%(max)

f=1kHz;f=20kHz

|V+|=|V−|=28V,RL=4Ω

|V+|=|V−|=28V,RL=8Ω

|V+|=|V−|=35V,RL=8Ω68

38

5060

30W(min)

W(min)

W

PeakPOInstantaneousPeakOutputPower135W

THD+NTotalHarmonicDistortionPlusNoise60W,RL=4Ω,

30W,RL=8Ω,

20Hz≤f≤20kHz

AV=26dB0.03

0.03%

%

SR

(Note4)SlewRate(Note13)VIN=2.0Vp-p,tRISE=2ns198V/µs

(min)

I+(Note4)TotalQuiescentPowerSupply

CurrentVCM=0V,Vo=0V,Io=0A5085mA(max)

VOS(Note3)InputOffsetVoltageVCM=0V,Io=0mA110mV(max)

IBInputBiasCurrentVCM=0V,Io=0mA0.21µA(max)

IOSInputOffsetCurrentVCM=0V,Io=0mA0.010.2µA(max)

IoOutputCurrentLimit|V+|=|V−|=20V,tON=10ms,VO=0V11.57A(min)

Vod(Note3)OutputDropoutVoltage(Note15)|V+–VO|,V+=28V,Io=+100mA

|VO–V−|,V−=−28V,Io=−100mA1.6

2.52.0

3.0V(max)

V(max)

PSRR

(Note3)PowerSupplyRejectionRatioV+=40Vto20V,V−=−40V,

VCM=0V,Io=0mA

V+=40V,V−=−40Vto−20V,

VCM=0V,Io=0mA120

10585

85dB(min)

dB(min)

CMRR

(Note3)CommonModeRejectionRatioV+=60Vto20V,V−=−20Vto−60V,

VCM=20Vto−20V,Io=0mA11085dB(min)

AVOL(Note3)OpenLoopVoltageGain|V+|=|V−|=28V,RL=2kΩ,∆VO=40V11590dB(min)

GBWPGain-BandwidthProduct|V+|=|V−|=30V

fO=100kHz,VIN=50mVrms82MHz

(min)

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