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AA4006Documentnumber:DS41330Rev.
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diodes.
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7WSTEREOAUDIOPOWERAMPLIFIERWITH4SELECTABLEGAINSETUPSANDINPUTMUXDescriptionTheAA4006isaClassABstereoaudiopoweramplifierwithheadphonedriver,whichcandeliver2.
7Winto3speakerswith5.
0VpowersupplyandTHD+Nlessthan10%.
ItisdesignedspeciallyfornotebookPCandportablemediaplayerapplications.
TheAA4006featuresstereofulldifferentialinputor2setsofstereosingle-endedaudioinput.
Thereare4differentgainsettingsatBTLmode-6dB,10dB,15.
6dBand21.
6dB,changedbysettingGAIN0,GAIN1pins.
AtSEmode,thegainisfixed4.
1dB.
TheAA4006canamplifysquarewaveformbeepinputsignalfromBEEP_INpinandits'outputcanalwaysreachBTLterminal,maskingallotheraudioinputsregardlessofwhetherthechipisinshutdown,SEorBTLmode.
TheAA4006isavailableinTSSOP-24(EDP)package.
FeaturesOutputPower,THD+N=10%:110mWatSEModefor32Headphone220mWatSEModefor16Headphone1.
5WatBTLModefor8Speaker2.
3WatBTLModefor4Speaker2.
7WatBTLModefor3SpeakerSupplyVoltageRange:4.
5Vto5.
5V4SelectableInternalFixedGainSetupsStereo2:1InputMultiplexerStereoFullDifferentialInputPCBeepInputLowPowerConsumptionatShutdownMode150mATypicalExcellentClick/PopNoiseSuppressionThermalShutdownProtectionPinAssignments(TopView)TSSOP-24(EDP)ApplicationsNotebookPCPortableMediaPlayerAA4006Documentnumber:DS41330Rev.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTTypicalApplicationsCircuitAA4006Documentnumber:DS41330Rev.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTPinDescriptionsPinNumberPinNameFunction1,12,13,24GNDGroundreference,itisbettertoconnectwiththermalpad2GAIN0Internalgainsetup0,seetable1below3GAIN1Internalgainsetup1,seetable1below4OUTL+Leftchannelpositiveoutput5L_LINE_INLeftchannellineinput6L_HP_INLeftchannelheadphoneinput7,18PVDDPowersupplyforoutputstage8R_INRightchannelcommoninputfordifferentialinput,ACgroundforsingle-endedinput9OUTL-Leftchannelnegativeoutput10L_INLeftchannelcommoninputfordifferentialinput,ACgroundforsingle-endedinput11BYPASSInternalreferencevoltagepin,connecta1.
0FceramiccapacitortoGND14BEEP_INBeepsignalinputpin15HP_SENSESE,BTLmodeswitchpin,L–BTLmode,H–SEmode16OUTR-Rightchannelnegativeoutput17HP_LINEHeadphone,lineinputselectpin,L–lineinput,H–headphoneinput19VDDPowersupplyforotheranalogcircuit20R_HP_INRightchannelheadphoneinput21OUTR+Rightchannelpositiveoutput22SHUTDOWNShutdownmodeselect,L–shutdownenable,H–shutdowndisable,normalwork23R_LINE_INRightchannellineinputAA4006Documentnumber:DS41330Rev.
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Gain0,Gain1LogicLevelGAIN0GAIN1HP_SENSEModeGainLLLBTL6dBLHLBTL10dBHLLBTL15.
6dBHHLBTL21.
6dBXXHSE4.
1dBAbsoluteMaximumRatings(Note1)SymbolParameterRatingUnitVDDPowerSupplyVoltage6.
0VVINInputVoltage-0.
3toVDD+0.
3VPDPowerDissipation(Note2)InternallyLimited-θJAThermalResistance65°C/WTJOperatingJunctionTemperature+150°CTSTGStorageTemperatureRange-65to+150°CTLEADLeadTemperature(Soldering,10sec)+260°CESDESD(HumanBodyModel)2000VESD(MachineModel)200VNotes:1.
Stressesgreaterthanthoselistedunder"AbsoluteMaximumRatings"maycausepermanentdamagetothedevice.
Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder"RecommendedOperatingConditions"isnotimplied.
Exposureto"AbsoluteMaximumRatings"forextendedperiodsmayaffectdevicereliability.
2.
Chipissolderedto100mm2(4mmx25mm)copper(topsidesoldermask)of1oz.
onPCBwith16x0.
5mmvias.
RecommendedOperatingConditionsSymbolParameterMinMaxUnitVDDSupplyVoltage4.
55.
5VTAOperatingAmbientTemperature-40+85°CAA4006Documentnumber:DS41330Rev.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTElectricalCharacteristics(VDD=5.
0V,Gain=6dB@BTLmode,4.
1dB@SEmode,TA=+25°C,f=1kHz,20kHzlowpassfilter,forSEmode,HP_SENSE=5.
0V,forBTLmode,HP_SENSE=0V,unlessotherwisespecified.
)SymbolParameterConditionMinTypMaxUnitIDDQuiescentCurrentSEmode,VIN=0,IO=0-3.
57mABTLmode,VIN=0,IO=0-6.
512ISDShutdownCurrentVSHUTDOWN=0V-150300AVIHHighLogicLevelHP_SENSE,HP_LINE-4.
0--VGAIN0,GAIN1-3.
0--VSHUTDOWN-2.
0--VVILLowLogicLevelHP_SENSE,HP_LINE---3.
0VGAIN0,GAIN1---2.
0VSHUTDOWN---0.
8V-ThermalShutdownTemperature--+165-°C-HysteresisTemperatureWindow--+35-°CBEEPVBPInputAmplitude-2.
5--VP-PGBPGainCBP=0.
47F,f=1kHz,D=50%squarewaveform,VBP=3.
3Vp-p-0.
3-V/VSEModePOOutputPowerTHD+N=1%,RL=32-90-mWTHD+N=10%,RL=32-110-THD+N=1%,RL=16-180-THD+N=10%,RL=16-220-THD+NTotalHarmonicDistortion+NoisePO=75mW,RL=32-0.
03-%S/NSignaltoNoiseRatioPO=75mW,RL=32-95-dBXTALKCrosstalkf=1kHz--90-dBPSRRPowerSupplyRejectionRatioCB=1F,f=1kHz,VRIPPLE=0.
2VRMS-60-dBVNOOutputNoisef=20Hzto20kHz,RL=32-20-VRMSBTLModeOutputOffsetVoltageVIN=0V,noload-525mVPOOutputPowerTHD+N=1%,RL=3-2.
1-WTHD+N=10%,RL=3-2.
7-THD+N=1%,RL=4-1.
8-THD+N=10%,RL=4-2.
3-THD+N=1%,RL=8-1.
2-THD+N=10%,RL=8-1.
5-AA4006Documentnumber:DS41330Rev.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTElectricalCharacteristics(VDD=5.
0V,Gain=6dB@BTLmode,4.
1dB@SEmode,TA=+25°C,f=1kHz,20kHzlowpassfilter,forSEmode,HP_SENSE=5.
0V,forBTLmode,HP_SENSE=0V,unlessotherwisespecified.
)(Cont.
)SymbolParameterConditionMinTypMaxUnitTHD+NTotalHarmonicDistortion+NoisePO=1W,RL=4-0.
08-%S/RSignaltoNoiseRatioPO=1W,RL=4-100-dBXTALKCrosstalkf=1kHz--100-dBPSRRPowerSupplyRejectionRatioCB=1F,f=1kHz,VRIPPLE=0.
2VRMS-70-dBVNOOutputNoisef=20Hzto20kHz,RL=8-18-VRMSPerformanceCharacteristicsQuiescentCurrentvs.
SupplyVoltageShutdownCurrentvs.
SupplyVoltageBypassVoltagevs.
SupplyVoltageTHD+Nvs.
OutputPowerAA4006Documentnumber:DS41330Rev.
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)THD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerAA4006Documentnumber:DS41330Rev.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTPerformanceCharacteristics(Cont.
)THD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
FrequencyTHD+Nvs.
FrequencyTHD+Nvs.
FrequencyAA4006Documentnumber:DS41330Rev.
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)THD+Nvs.
OutputPowerPSRRvs.
FrequencyPSRRvs.
FrequencyTHD+Nvs.
FrequencyCrosstalkvs.
FrequencyGainvs.
FrequencyAA4006Documentnumber:DS41330Rev.
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)Gainvs.
FrequencyTHD+Nvs.
CommonModeInputVoltageTHD+Nvs.
OutputVoltagePopNoiseatSEModeCH1CH2CH3(VDD=5V,SEMode,RL=32,Cb=1.
0F,CIN=0.
47F,COUT=220F,CH1=VSHUTDOWN,CH2=VBYPASS,CH3=VOUTatRL)AA4006Documentnumber:DS41330Rev.
3-411of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformationSE/BTLMode,HP_SENSEPinTheAA4006canoperateunder2typesofoutputconfiguration,SE(Single-Ended)modeandBTL(BridgedTiedLoad)mode,determinedbyHP_SENSEpin'slogiclevel.
(Hereisthediscussionaboutleftchannelonly,itcanequallyapplytorightchannel.
)WhenHP_SENSEpinisheldlowwhichsetsthechipinBTLmode,bothAMP1andAMP2areturnedon.
AMP2hasthesamegainwithAMP1except180degreephaseshift.
BecausetheDCcomponent(outputbiasvoltagefromAMP1andAMP2,approx.
1/2VDD)betweenOUT+andOUT-iscanceled,thereisnonecessitytouseDCblockcapacitorsforspeakerload.
InBTLmode,outputvoltageswingacrossloadisabout2timesthatinSEmode,sothereisabout4timesoutputpowercomparedtoSEmodewithsameloadandinput.
(SeeFigure1)IfapplyinghighleveltoHP_SENSEpinwhichsetsthechipinSEmode,AMP2unitisturnedoffwithhighimpedance.
ThereisnocurrentloopbetweenOUT+andOUT-,thespeakerisnaturallydisabledwithoutanyhardwarechange.
TheoutputaudiosignalridesonbiasvoltageatOUT+(outputbiasvoltagefromAMP1andAMP2,approx.
1/2VDD),soithastouseacapacitorCOUTtoblockDCbiasvoltageandcoupleACsignaltoheadphoneload.
ItisrecommendedtoconnectHP_SENSEtotheheadphonejackswitchpinillustratedinFigure1.
Whenheadphoneplugisnotinserted,thevoltageofHP_SENSEpinisdeterminedbyvoltagedividerformedbyRLandR12.
Forgivenresistors'valueinFigure1,RL=1k,R12=100k(AssumingVDD=5.
0V),DCvoltageatHP_SENSEnodeisabout49.
5mV.
ACsignalequalsoutputamplitudeofOUT+throughCOUT,themaximumpeak-peakvoltageisnogreaterthanVDD,sothepositivemaximumvoltageofHP_SENSEnodewillbenogreaterthan2.
5V+49.
5mV=2.
55V(DCvoltageplusACvoltage),whichislessthanHP_SENSEinputhighlevelminimumvalue(4.
0V).
ThatmeansthechipworksinBTLmodereliablyandthereisnoriskofoperationmodeswitchbetweenSEandBTL.
Whenheadphoneplugisinserted,astheRLisdisconnectedfromR12,thevoltageofHP_SENSEpinispulledupbyR12toVDDsetsthechipinSEmode.
HP_SENSEpincanalsobeconnectedtoMCUI/OportdirectlytoswitchtheoperationmodebetweenSEandBTL.
Figure1.
InputMUXandOutputConfigurationforLeftChannelAA4006Documentnumber:DS41330Rev.
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)Figure2.
Single-EndedInputInputMUX,Single-EndedInputandDifferentialInputTheAA4006offersthecapabilitytouse2individualstereoinputs:headphoneinputandlineinput.
Forasingle-endedinput,thecommoninputterminalpins(L_IN,R_IN)shouldbeconnectedtogroundthroughacapacitor,alsothesizeofCLIN(CRIN)hastobethesameasCLLIN(CRLIN),CLHPIN(CRHPIN).
LineinputandheadphoneinputareselectedbyswitchingHP_LINEpin.
WhenHP_LINEispulledhigh,theheadphoneinput(L_HP_IN,R_HP_IN)isselected.
WhenHP_LINEisheldlow,thelineinput(L_LINE_IN,R_LINE_IN)isselected.
Iftheinputsignalsaredifferential,onlyonestereosignalispermittedbecausesharecommoninputterminalpin(L_IN,R_IN),bothheadphoneinputandlineinputcanbeformedintodifferentialpairwithcommoninputterminal.
(SeeFigure3)Withdifferentialinputconfiguration,theinputcouplingcapacitorsofdifferentialpaircanberemovedifDCbiasvoltageofinputsourceiswithininputcommon-modevoltagerange,refertoFigureTHD+Nvs.
CommonModeInputVoltageinPerformanceCharacteristics.
AA4006Documentnumber:DS41330Rev.
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)A)UsingLINE_INB)UsingHP_INFigure3.
DifferentialInputwithInputCouplingCapacitorsAA4006Documentnumber:DS41330Rev.
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)A)UsingLINE_INB)UsingHP_INFigure4.
DifferentialInputwithoutInputCouplingCapacitorsAA4006Documentnumber:DS41330Rev.
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)CIN,COUT,CBandCS(PowerSupply)SelectionAlthoughthereisnonecessarytouseinputcouplingcapacitorsindifferentialinputifDCvoltageofinputiswithincommon-modeinputvoltagerange.
TheAA4006allowsusinginputcapacitorsCINtoaccommodatedifferentDClevelbetweeninputsource(likeAudioD-Aconverter)andbiasvoltage(about1/2VDD),especiallyinsingle-endedinputmodewhichispopularlyusedinmostapplications.
InputstageofAA4006isillustratedasFigure5,itisafulldifferentialarchitecture,whichconsistsofinputresistor,RINandfeedbackresistor,RFB.
InSEmode,pass-bandgainis,1)InBTLmode,pass-bandgainis,2)Figure5.
FullDifferentialInputStageofAA4006Thetypicalinputresistance,feedbackresistanceofAA4006ateachgainsettingareshowedinthetablebelow.
GAIN0GAIN1HP_SENSEGAIN(dB)RIN()RFB()00069090010107011010015.
64513511021.
625154xx14.
170110AA4006Documentnumber:DS41330Rev.
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)InputcapacitorsCINandinputresistorsRINformafirstorderHighPassFilter,whichdeterminesthelowercornerfrequencyaccordingtotheequationbelow.
3)ItisalittledifferentfromtheclassicequationaccordingtoFigure6.
A)AA4006InputConfigurationwithInputCapacitorB)ClassicInputConfigurationwithInputCapacitorFigure6.
InputConfigurationwithInputCapacitor,CINInputresistancevarieswithgainsetting,alsotheabsoluteresistanceofRINmaydrift±20%duetofabprocess.
Toensuretheminimumcut-offfrequencywithintheaudiblerange,theinputcapacitor(CIN)hastobegreaterthan0.
33F.
ThelowESRceramiccapacitorof0.
47Fisrecommended.
SeeFigure7forfrequencyresponseusing0.
47FCIN.
However,usingbiggersizeofCINwillaffectpopnoiseofAA4006.
IfusinganexternalresistorREXTinserieswithinputcapacitorCIN,theclosed-loopgainandcut-offfrequencycanbecalculatedbyequationsbelow.
AA4006Documentnumber:DS41330Rev.
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)Figure7.
FrequencyResponseUsing0.
47FInputCapacitor4)5)Figure8.
UsinganExternalResistor,REXTinSerieswithInputCapacitor,CINSimilarly,foroutputstageinSEmode,outputcapacitor(COUT)andheadphoneload(RHP)alsoformafirstorderHighPassFilter,anditslowercut-offfrequencyisdeterminedbyequation6.
6)AA4006Documentnumber:DS41330Rev.
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)COUT(F)HeadphoneLoad()LowerCut-offFrequency(Hz)2201645.
22203222.
633016303303215Thepurposeofthebypasscapacitor(CB)istofilternoise,reducetotalharmonicdistortionplusnoise,andimprovepowersupplyrejectionratioperformance.
Tantalumorceramiccapacitorof1.
0FwithlowESRisrecommended,anditshouldbeplacedascloseaspossibletothechipinPCBlayout.
Thiscapacitoraffectsthepopnoiseperformancefurthestbychangingtherampofchargeand/ordischarge.
Thebelowtableshowsoutputnoiseineachgainundertheconditionof1.
0Fbypasscapacitor.
Unit:Vrms.
--Filter:22Hz~22kHzA-WeightedFilterSEModeCOUT=220F,RL=162216COUT=220F,RL=322317BTLModeRL=4Gain0,Gain1=0,018.
513.
5Gain0,Gain1=0,12317Gain0,Gain1=1,03224.
5Gain0,Gain1=1,146.
537RL=8Gain0,Gain1=0,01914Gain0,Gain1=0,12418Gain0,Gain1=1,033.
525.
5Gain0,Gain1=1,15239ForAA4006powersupply,itisbettertouseanindividualpowersourcegeneratedfromvoltageregulatorsplitfromvideo,digitalcircuitunitsinsystem.
Forpowersupplybypasscapacitor(CS),itisrecommendedtouseonelowESRelectrolyticortantalumcapacitorfrom4.
7Fto10Finparallelwith0.
1Fceramiccapacitorwhichislocatedclosetothechip.
ShutdownAA4006hasashutdownfeaturetoreducepowerconsumptionduringnon-useoperation.
Ifapplylowleveltoshutdownpin,outputamplifiers,biascircuitwillbeturnedoff,thecurrentdrawnfromVDDisabout100A.
However,theBeepDetectcircuitryisalwaysreadytogivealertonspeakerloadonceapplyanyvalidsignalintoBEEP_INpin.
TheSHUTDOWNpinshouldbepulledhighduringnormaloperation,anditshouldneverbeleftfloatingtopreventtheunpredictablestatusofthechip.
However,themusicsignalwillbeoutputinstantlyoncetheSHUTDOWNpinisappliedtologiclevelfromlowtohigh.
WhentheSHUTDOWNpinchangesfromhightolow,outputwillbepresentuntilbiasvoltagedropstoapprox0.
1V.
SeeFigure9fortimerelationshipbetweenshutdown,biasvoltageandoutput.
AA4006Documentnumber:DS41330Rev.
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diodes.
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)Figure9.
TimeChartforVSHUTDOWN,VBIASandVOUTOptimizingClick/PopNoiseTheAA4006includesoptimizedcircuitstosuppressClick/Popnoiseduringpowerup/powerdowntransition.
InBTLmode,AA4006canreducemostcommonmodesignalalsoincludingClick/Popnoiseduetosymmetricaloutput.
InSEmode,optimizedrampforrise/falledgeofbiascansignificantlyreduceClick/Popnoisegeneratedbyoutputcapacitor(COUT)chargeand/ordischarge.
Smoothingrise/falledgeofDCbiasvoltageisaquiteimportantmethod.
Anotherwayistoprolongcharge/dischargetimewhichcanshapepowerspectrumofoutput,andthismakessomefrequenciesoutsideofthehumanaudiblerange(20Hzto20kHz).
Soexternalcomponents(includingCB,CIN,COUTandheadphoneload)willaffectpopnoiseperformance.
Therecommendedcomponentsare,CB=1.
0F,CIN=0.
47F,COUT=220F,32forheadphoneload.
Undergivenconditions,themaximumpeak-peakvoltageofpopnoiseislessthan15mV(SeeFigurePopNoiseatSEMode).
Ifusing16headphone,thevoltageofpopnoisewilldecreaseaccordingly.
BeepInputBeepinputfeatureisusedincomputersystemforalerting.
Abeepsignalcanbesentdirectlyfromacomputer.
Ifpeak-peakvoltageofbeepsignalappliedtoBEEP_INpin(pin14)exceedsacertainvoltage(typical1/2VDD),thefeaturewillbeactivatedautomatically,thenAA4006willbeforcedinBTLmodewiththefixedgainof0.
3V/V,bothLINE_INandHP_INaredeselected,thelogiclevelofHP_SENSE,HP_LINE,GAIN0,GAIN1andSHUTDOWNisignored.
Oncebeepsignalisremovedfromthechip,theAA4006willreturntothepreviousoperationmode,gainsettings.
Thepreferredbeepsignalisasquarewaveorpulsetrain,thepreferredinputisDC-coupled.
IfusingAC-coupled,assumingbeepinputcapacitoris0.
47F,theinputvoltageis3.
3VP-Psquarewave,thebeepsignalshouldhaveaminimumof10cycles.
PowerDissipation,EfficiencyandThermalDesignConsiderationForClassABamplifiers,equation7isthebasicequationofefficiencyworkedinBTLmode,7)HereVPisoutputpeakvoltageacrosstheload.
ThermaldissipationbecomesmajorconcernwhendeliveringmorepowerintospeakerespeciallyinBTLmode.
ThemaximumallowedpowerdissipationcanbecalculatedbyequationbelowwhichisdeterminedbythermalresistanceofAA4006package.
8)AA4006Documentnumber:DS41330Rev.
3-420of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)HereTJMAXismaximumoperatingjunctiontemperatureof+150°C,TAisambienttemperature,θJAisthermalresistancefromjunctiontoambient.
ForTSSOP-24(EDP)package,itis65°C/Wgivenindatasheet.
AssumingTAis+25°C,themaximumallowedpowerdissipationisabout1.
92Waccordingtoequation8.
Thereisanotherequationaboutpowerdissipationwhichisdeterminedbypowersupplyvoltageandloadresistanceunderacertainapplication.
9)Theaboveequationexpressestotalpowerdissipation,dominatedbydualchannels,quiescentcurrent.
Itisaquadraticequationwiththenegativecoefficientofoutputvoltagevariation(VP),thereisalwaysamaximumshowedasbelow.
10)Ifpowerdissipationcalculatedbyapplicationislargerthanthepackagepermitted,itisnecessarytouselargercopperplaneunderthechip,orassembleanadditionalheatsink,oruseforced-aircoolingtokeepambienttemperaturearoundthechiplow,orincreaseloadresistance,ordecreasepowersupplyvoltage.
Forexample,assumingVDD=5.
0V,speakerloadRSP=4.
0,stereoinBTLmode,themaximumpowerdissipation,includes2channels,plusquiescentpowerdissipation,dominatedbyquiescentcurrent.
Thatistosay,tomakesureAA4006canoutputpowerintostereo4speakerscontinuously,themaximumambienttemperatureshouldbenomorethan,Themaximumpowerdissipationisachievedonlywhenoutputpowerper-channelequals2*VDD2/π*RSP.
Ifactualoutputpowerisnotthisdata,powerdissipationwillbelessthan2.
56W.
Whenjunctiontemperatureexceedsabout+165°C,OTSDfeaturewillbeenabled,thatturnsoffoutputamplifierstopreventdamagingthechip.
Oncejunctiontemperaturedropslowerthan+130°C,thechipwillworkagainautomatically.
Thereisanexposedthermalpadonthebottomofthechiptoprovidethedirectthermalpathfromdietoheatsink.
ItisrecommendedtousecopperonthesurfaceofPrintedCircuitBoard(PCB)asheatsink.
Todigsomematrixregularholesunderchip,removemaskofthisareacopper,andmakesuretokeepthemcontactwellwhensolderingonPCBarealsorecommended.
(SeeFigure10)AA4006Documentnumber:DS41330Rev.
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)Figure10.
RecommendedPCBLayoutforHeatSinkRecommendedPCBLayoutUsingwidetracesforpowersupply,BTLoutputstoreducepowerlossescausedbyparasiticresistanceisrecommended.
Itisalsorecommendedtoplacebypasscapacitor,andpowersupplydecouplecapacitorascloseaspossibletothechip.
Figure11.
TopRouteandCopperAA4006Documentnumber:DS41330Rev.
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)Figure12.
BottomRouteandCopperOrderingInformationPackageTemperatureRangePartNumberMarkingIDPackingRoHSCompliantRoHSCompliantandGreenRoHSCompliantRoHSCompliantandGreenTSSOP-24(EDP)-40to+85CAA4006GTR-E1AA4006GTR-G1AA4006GAA4006G-G1Tape&ReelAA4006Documentnumber:DS41330Rev.
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)(1)PackageType:TSSOP-24(EDP)AA4006Documentnumber:DS41330Rev.
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Copyright2018,DiodesIncorporatedwww.
diodes.
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3-41of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPART2.
7WSTEREOAUDIOPOWERAMPLIFIERWITH4SELECTABLEGAINSETUPSANDINPUTMUXDescriptionTheAA4006isaClassABstereoaudiopoweramplifierwithheadphonedriver,whichcandeliver2.
7Winto3speakerswith5.
0VpowersupplyandTHD+Nlessthan10%.
ItisdesignedspeciallyfornotebookPCandportablemediaplayerapplications.
TheAA4006featuresstereofulldifferentialinputor2setsofstereosingle-endedaudioinput.
Thereare4differentgainsettingsatBTLmode-6dB,10dB,15.
6dBand21.
6dB,changedbysettingGAIN0,GAIN1pins.
AtSEmode,thegainisfixed4.
1dB.
TheAA4006canamplifysquarewaveformbeepinputsignalfromBEEP_INpinandits'outputcanalwaysreachBTLterminal,maskingallotheraudioinputsregardlessofwhetherthechipisinshutdown,SEorBTLmode.
TheAA4006isavailableinTSSOP-24(EDP)package.
FeaturesOutputPower,THD+N=10%:110mWatSEModefor32Headphone220mWatSEModefor16Headphone1.
5WatBTLModefor8Speaker2.
3WatBTLModefor4Speaker2.
7WatBTLModefor3SpeakerSupplyVoltageRange:4.
5Vto5.
5V4SelectableInternalFixedGainSetupsStereo2:1InputMultiplexerStereoFullDifferentialInputPCBeepInputLowPowerConsumptionatShutdownMode150mATypicalExcellentClick/PopNoiseSuppressionThermalShutdownProtectionPinAssignments(TopView)TSSOP-24(EDP)ApplicationsNotebookPCPortableMediaPlayerAA4006Documentnumber:DS41330Rev.
3-42of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTTypicalApplicationsCircuitAA4006Documentnumber:DS41330Rev.
3-43of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTPinDescriptionsPinNumberPinNameFunction1,12,13,24GNDGroundreference,itisbettertoconnectwiththermalpad2GAIN0Internalgainsetup0,seetable1below3GAIN1Internalgainsetup1,seetable1below4OUTL+Leftchannelpositiveoutput5L_LINE_INLeftchannellineinput6L_HP_INLeftchannelheadphoneinput7,18PVDDPowersupplyforoutputstage8R_INRightchannelcommoninputfordifferentialinput,ACgroundforsingle-endedinput9OUTL-Leftchannelnegativeoutput10L_INLeftchannelcommoninputfordifferentialinput,ACgroundforsingle-endedinput11BYPASSInternalreferencevoltagepin,connecta1.
0FceramiccapacitortoGND14BEEP_INBeepsignalinputpin15HP_SENSESE,BTLmodeswitchpin,L–BTLmode,H–SEmode16OUTR-Rightchannelnegativeoutput17HP_LINEHeadphone,lineinputselectpin,L–lineinput,H–headphoneinput19VDDPowersupplyforotheranalogcircuit20R_HP_INRightchannelheadphoneinput21OUTR+Rightchannelpositiveoutput22SHUTDOWNShutdownmodeselect,L–shutdownenable,H–shutdowndisable,normalwork23R_LINE_INRightchannellineinputAA4006Documentnumber:DS41330Rev.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTTable1:Gainvs.
Gain0,Gain1LogicLevelGAIN0GAIN1HP_SENSEModeGainLLLBTL6dBLHLBTL10dBHLLBTL15.
6dBHHLBTL21.
6dBXXHSE4.
1dBAbsoluteMaximumRatings(Note1)SymbolParameterRatingUnitVDDPowerSupplyVoltage6.
0VVINInputVoltage-0.
3toVDD+0.
3VPDPowerDissipation(Note2)InternallyLimited-θJAThermalResistance65°C/WTJOperatingJunctionTemperature+150°CTSTGStorageTemperatureRange-65to+150°CTLEADLeadTemperature(Soldering,10sec)+260°CESDESD(HumanBodyModel)2000VESD(MachineModel)200VNotes:1.
Stressesgreaterthanthoselistedunder"AbsoluteMaximumRatings"maycausepermanentdamagetothedevice.
Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder"RecommendedOperatingConditions"isnotimplied.
Exposureto"AbsoluteMaximumRatings"forextendedperiodsmayaffectdevicereliability.
2.
Chipissolderedto100mm2(4mmx25mm)copper(topsidesoldermask)of1oz.
onPCBwith16x0.
5mmvias.
RecommendedOperatingConditionsSymbolParameterMinMaxUnitVDDSupplyVoltage4.
55.
5VTAOperatingAmbientTemperature-40+85°CAA4006Documentnumber:DS41330Rev.
3-45of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTElectricalCharacteristics(VDD=5.
0V,Gain=6dB@BTLmode,4.
1dB@SEmode,TA=+25°C,f=1kHz,20kHzlowpassfilter,forSEmode,HP_SENSE=5.
0V,forBTLmode,HP_SENSE=0V,unlessotherwisespecified.
)SymbolParameterConditionMinTypMaxUnitIDDQuiescentCurrentSEmode,VIN=0,IO=0-3.
57mABTLmode,VIN=0,IO=0-6.
512ISDShutdownCurrentVSHUTDOWN=0V-150300AVIHHighLogicLevelHP_SENSE,HP_LINE-4.
0--VGAIN0,GAIN1-3.
0--VSHUTDOWN-2.
0--VVILLowLogicLevelHP_SENSE,HP_LINE---3.
0VGAIN0,GAIN1---2.
0VSHUTDOWN---0.
8V-ThermalShutdownTemperature--+165-°C-HysteresisTemperatureWindow--+35-°CBEEPVBPInputAmplitude-2.
5--VP-PGBPGainCBP=0.
47F,f=1kHz,D=50%squarewaveform,VBP=3.
3Vp-p-0.
3-V/VSEModePOOutputPowerTHD+N=1%,RL=32-90-mWTHD+N=10%,RL=32-110-THD+N=1%,RL=16-180-THD+N=10%,RL=16-220-THD+NTotalHarmonicDistortion+NoisePO=75mW,RL=32-0.
03-%S/NSignaltoNoiseRatioPO=75mW,RL=32-95-dBXTALKCrosstalkf=1kHz--90-dBPSRRPowerSupplyRejectionRatioCB=1F,f=1kHz,VRIPPLE=0.
2VRMS-60-dBVNOOutputNoisef=20Hzto20kHz,RL=32-20-VRMSBTLModeOutputOffsetVoltageVIN=0V,noload-525mVPOOutputPowerTHD+N=1%,RL=3-2.
1-WTHD+N=10%,RL=3-2.
7-THD+N=1%,RL=4-1.
8-THD+N=10%,RL=4-2.
3-THD+N=1%,RL=8-1.
2-THD+N=10%,RL=8-1.
5-AA4006Documentnumber:DS41330Rev.
3-46of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTElectricalCharacteristics(VDD=5.
0V,Gain=6dB@BTLmode,4.
1dB@SEmode,TA=+25°C,f=1kHz,20kHzlowpassfilter,forSEmode,HP_SENSE=5.
0V,forBTLmode,HP_SENSE=0V,unlessotherwisespecified.
)(Cont.
)SymbolParameterConditionMinTypMaxUnitTHD+NTotalHarmonicDistortion+NoisePO=1W,RL=4-0.
08-%S/RSignaltoNoiseRatioPO=1W,RL=4-100-dBXTALKCrosstalkf=1kHz--100-dBPSRRPowerSupplyRejectionRatioCB=1F,f=1kHz,VRIPPLE=0.
2VRMS-70-dBVNOOutputNoisef=20Hzto20kHz,RL=8-18-VRMSPerformanceCharacteristicsQuiescentCurrentvs.
SupplyVoltageShutdownCurrentvs.
SupplyVoltageBypassVoltagevs.
SupplyVoltageTHD+Nvs.
OutputPowerAA4006Documentnumber:DS41330Rev.
3-47of24www.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTPerformanceCharacteristics(Cont.
)THD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerAA4006Documentnumber:DS41330Rev.
3-48of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTPerformanceCharacteristics(Cont.
)THD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
OutputPowerTHD+Nvs.
FrequencyTHD+Nvs.
FrequencyTHD+Nvs.
FrequencyAA4006Documentnumber:DS41330Rev.
3-49of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTPerformanceCharacteristics(Cont.
)THD+Nvs.
OutputPowerPSRRvs.
FrequencyPSRRvs.
FrequencyTHD+Nvs.
FrequencyCrosstalkvs.
FrequencyGainvs.
FrequencyAA4006Documentnumber:DS41330Rev.
3-410of24www.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTPerformanceCharacteristics(Cont.
)Gainvs.
FrequencyTHD+Nvs.
CommonModeInputVoltageTHD+Nvs.
OutputVoltagePopNoiseatSEModeCH1CH2CH3(VDD=5V,SEMode,RL=32,Cb=1.
0F,CIN=0.
47F,COUT=220F,CH1=VSHUTDOWN,CH2=VBYPASS,CH3=VOUTatRL)AA4006Documentnumber:DS41330Rev.
3-411of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformationSE/BTLMode,HP_SENSEPinTheAA4006canoperateunder2typesofoutputconfiguration,SE(Single-Ended)modeandBTL(BridgedTiedLoad)mode,determinedbyHP_SENSEpin'slogiclevel.
(Hereisthediscussionaboutleftchannelonly,itcanequallyapplytorightchannel.
)WhenHP_SENSEpinisheldlowwhichsetsthechipinBTLmode,bothAMP1andAMP2areturnedon.
AMP2hasthesamegainwithAMP1except180degreephaseshift.
BecausetheDCcomponent(outputbiasvoltagefromAMP1andAMP2,approx.
1/2VDD)betweenOUT+andOUT-iscanceled,thereisnonecessitytouseDCblockcapacitorsforspeakerload.
InBTLmode,outputvoltageswingacrossloadisabout2timesthatinSEmode,sothereisabout4timesoutputpowercomparedtoSEmodewithsameloadandinput.
(SeeFigure1)IfapplyinghighleveltoHP_SENSEpinwhichsetsthechipinSEmode,AMP2unitisturnedoffwithhighimpedance.
ThereisnocurrentloopbetweenOUT+andOUT-,thespeakerisnaturallydisabledwithoutanyhardwarechange.
TheoutputaudiosignalridesonbiasvoltageatOUT+(outputbiasvoltagefromAMP1andAMP2,approx.
1/2VDD),soithastouseacapacitorCOUTtoblockDCbiasvoltageandcoupleACsignaltoheadphoneload.
ItisrecommendedtoconnectHP_SENSEtotheheadphonejackswitchpinillustratedinFigure1.
Whenheadphoneplugisnotinserted,thevoltageofHP_SENSEpinisdeterminedbyvoltagedividerformedbyRLandR12.
Forgivenresistors'valueinFigure1,RL=1k,R12=100k(AssumingVDD=5.
0V),DCvoltageatHP_SENSEnodeisabout49.
5mV.
ACsignalequalsoutputamplitudeofOUT+throughCOUT,themaximumpeak-peakvoltageisnogreaterthanVDD,sothepositivemaximumvoltageofHP_SENSEnodewillbenogreaterthan2.
5V+49.
5mV=2.
55V(DCvoltageplusACvoltage),whichislessthanHP_SENSEinputhighlevelminimumvalue(4.
0V).
ThatmeansthechipworksinBTLmodereliablyandthereisnoriskofoperationmodeswitchbetweenSEandBTL.
Whenheadphoneplugisinserted,astheRLisdisconnectedfromR12,thevoltageofHP_SENSEpinispulledupbyR12toVDDsetsthechipinSEmode.
HP_SENSEpincanalsobeconnectedtoMCUI/OportdirectlytoswitchtheoperationmodebetweenSEandBTL.
Figure1.
InputMUXandOutputConfigurationforLeftChannelAA4006Documentnumber:DS41330Rev.
3-412of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)Figure2.
Single-EndedInputInputMUX,Single-EndedInputandDifferentialInputTheAA4006offersthecapabilitytouse2individualstereoinputs:headphoneinputandlineinput.
Forasingle-endedinput,thecommoninputterminalpins(L_IN,R_IN)shouldbeconnectedtogroundthroughacapacitor,alsothesizeofCLIN(CRIN)hastobethesameasCLLIN(CRLIN),CLHPIN(CRHPIN).
LineinputandheadphoneinputareselectedbyswitchingHP_LINEpin.
WhenHP_LINEispulledhigh,theheadphoneinput(L_HP_IN,R_HP_IN)isselected.
WhenHP_LINEisheldlow,thelineinput(L_LINE_IN,R_LINE_IN)isselected.
Iftheinputsignalsaredifferential,onlyonestereosignalispermittedbecausesharecommoninputterminalpin(L_IN,R_IN),bothheadphoneinputandlineinputcanbeformedintodifferentialpairwithcommoninputterminal.
(SeeFigure3)Withdifferentialinputconfiguration,theinputcouplingcapacitorsofdifferentialpaircanberemovedifDCbiasvoltageofinputsourceiswithininputcommon-modevoltagerange,refertoFigureTHD+Nvs.
CommonModeInputVoltageinPerformanceCharacteristics.
AA4006Documentnumber:DS41330Rev.
3-413of24www.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)A)UsingLINE_INB)UsingHP_INFigure3.
DifferentialInputwithInputCouplingCapacitorsAA4006Documentnumber:DS41330Rev.
3-414of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)A)UsingLINE_INB)UsingHP_INFigure4.
DifferentialInputwithoutInputCouplingCapacitorsAA4006Documentnumber:DS41330Rev.
3-415of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)CIN,COUT,CBandCS(PowerSupply)SelectionAlthoughthereisnonecessarytouseinputcouplingcapacitorsindifferentialinputifDCvoltageofinputiswithincommon-modeinputvoltagerange.
TheAA4006allowsusinginputcapacitorsCINtoaccommodatedifferentDClevelbetweeninputsource(likeAudioD-Aconverter)andbiasvoltage(about1/2VDD),especiallyinsingle-endedinputmodewhichispopularlyusedinmostapplications.
InputstageofAA4006isillustratedasFigure5,itisafulldifferentialarchitecture,whichconsistsofinputresistor,RINandfeedbackresistor,RFB.
InSEmode,pass-bandgainis,1)InBTLmode,pass-bandgainis,2)Figure5.
FullDifferentialInputStageofAA4006Thetypicalinputresistance,feedbackresistanceofAA4006ateachgainsettingareshowedinthetablebelow.
GAIN0GAIN1HP_SENSEGAIN(dB)RIN()RFB()00069090010107011010015.
64513511021.
625154xx14.
170110AA4006Documentnumber:DS41330Rev.
3-416of24www.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)InputcapacitorsCINandinputresistorsRINformafirstorderHighPassFilter,whichdeterminesthelowercornerfrequencyaccordingtotheequationbelow.
3)ItisalittledifferentfromtheclassicequationaccordingtoFigure6.
A)AA4006InputConfigurationwithInputCapacitorB)ClassicInputConfigurationwithInputCapacitorFigure6.
InputConfigurationwithInputCapacitor,CINInputresistancevarieswithgainsetting,alsotheabsoluteresistanceofRINmaydrift±20%duetofabprocess.
Toensuretheminimumcut-offfrequencywithintheaudiblerange,theinputcapacitor(CIN)hastobegreaterthan0.
33F.
ThelowESRceramiccapacitorof0.
47Fisrecommended.
SeeFigure7forfrequencyresponseusing0.
47FCIN.
However,usingbiggersizeofCINwillaffectpopnoiseofAA4006.
IfusinganexternalresistorREXTinserieswithinputcapacitorCIN,theclosed-loopgainandcut-offfrequencycanbecalculatedbyequationsbelow.
AA4006Documentnumber:DS41330Rev.
3-417of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)Figure7.
FrequencyResponseUsing0.
47FInputCapacitor4)5)Figure8.
UsinganExternalResistor,REXTinSerieswithInputCapacitor,CINSimilarly,foroutputstageinSEmode,outputcapacitor(COUT)andheadphoneload(RHP)alsoformafirstorderHighPassFilter,anditslowercut-offfrequencyisdeterminedbyequation6.
6)AA4006Documentnumber:DS41330Rev.
3-418of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)COUT(F)HeadphoneLoad()LowerCut-offFrequency(Hz)2201645.
22203222.
633016303303215Thepurposeofthebypasscapacitor(CB)istofilternoise,reducetotalharmonicdistortionplusnoise,andimprovepowersupplyrejectionratioperformance.
Tantalumorceramiccapacitorof1.
0FwithlowESRisrecommended,anditshouldbeplacedascloseaspossibletothechipinPCBlayout.
Thiscapacitoraffectsthepopnoiseperformancefurthestbychangingtherampofchargeand/ordischarge.
Thebelowtableshowsoutputnoiseineachgainundertheconditionof1.
0Fbypasscapacitor.
Unit:Vrms.
--Filter:22Hz~22kHzA-WeightedFilterSEModeCOUT=220F,RL=162216COUT=220F,RL=322317BTLModeRL=4Gain0,Gain1=0,018.
513.
5Gain0,Gain1=0,12317Gain0,Gain1=1,03224.
5Gain0,Gain1=1,146.
537RL=8Gain0,Gain1=0,01914Gain0,Gain1=0,12418Gain0,Gain1=1,033.
525.
5Gain0,Gain1=1,15239ForAA4006powersupply,itisbettertouseanindividualpowersourcegeneratedfromvoltageregulatorsplitfromvideo,digitalcircuitunitsinsystem.
Forpowersupplybypasscapacitor(CS),itisrecommendedtouseonelowESRelectrolyticortantalumcapacitorfrom4.
7Fto10Finparallelwith0.
1Fceramiccapacitorwhichislocatedclosetothechip.
ShutdownAA4006hasashutdownfeaturetoreducepowerconsumptionduringnon-useoperation.
Ifapplylowleveltoshutdownpin,outputamplifiers,biascircuitwillbeturnedoff,thecurrentdrawnfromVDDisabout100A.
However,theBeepDetectcircuitryisalwaysreadytogivealertonspeakerloadonceapplyanyvalidsignalintoBEEP_INpin.
TheSHUTDOWNpinshouldbepulledhighduringnormaloperation,anditshouldneverbeleftfloatingtopreventtheunpredictablestatusofthechip.
However,themusicsignalwillbeoutputinstantlyoncetheSHUTDOWNpinisappliedtologiclevelfromlowtohigh.
WhentheSHUTDOWNpinchangesfromhightolow,outputwillbepresentuntilbiasvoltagedropstoapprox0.
1V.
SeeFigure9fortimerelationshipbetweenshutdown,biasvoltageandoutput.
AA4006Documentnumber:DS41330Rev.
3-419of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)Figure9.
TimeChartforVSHUTDOWN,VBIASandVOUTOptimizingClick/PopNoiseTheAA4006includesoptimizedcircuitstosuppressClick/Popnoiseduringpowerup/powerdowntransition.
InBTLmode,AA4006canreducemostcommonmodesignalalsoincludingClick/Popnoiseduetosymmetricaloutput.
InSEmode,optimizedrampforrise/falledgeofbiascansignificantlyreduceClick/Popnoisegeneratedbyoutputcapacitor(COUT)chargeand/ordischarge.
Smoothingrise/falledgeofDCbiasvoltageisaquiteimportantmethod.
Anotherwayistoprolongcharge/dischargetimewhichcanshapepowerspectrumofoutput,andthismakessomefrequenciesoutsideofthehumanaudiblerange(20Hzto20kHz).
Soexternalcomponents(includingCB,CIN,COUTandheadphoneload)willaffectpopnoiseperformance.
Therecommendedcomponentsare,CB=1.
0F,CIN=0.
47F,COUT=220F,32forheadphoneload.
Undergivenconditions,themaximumpeak-peakvoltageofpopnoiseislessthan15mV(SeeFigurePopNoiseatSEMode).
Ifusing16headphone,thevoltageofpopnoisewilldecreaseaccordingly.
BeepInputBeepinputfeatureisusedincomputersystemforalerting.
Abeepsignalcanbesentdirectlyfromacomputer.
Ifpeak-peakvoltageofbeepsignalappliedtoBEEP_INpin(pin14)exceedsacertainvoltage(typical1/2VDD),thefeaturewillbeactivatedautomatically,thenAA4006willbeforcedinBTLmodewiththefixedgainof0.
3V/V,bothLINE_INandHP_INaredeselected,thelogiclevelofHP_SENSE,HP_LINE,GAIN0,GAIN1andSHUTDOWNisignored.
Oncebeepsignalisremovedfromthechip,theAA4006willreturntothepreviousoperationmode,gainsettings.
Thepreferredbeepsignalisasquarewaveorpulsetrain,thepreferredinputisDC-coupled.
IfusingAC-coupled,assumingbeepinputcapacitoris0.
47F,theinputvoltageis3.
3VP-Psquarewave,thebeepsignalshouldhaveaminimumof10cycles.
PowerDissipation,EfficiencyandThermalDesignConsiderationForClassABamplifiers,equation7isthebasicequationofefficiencyworkedinBTLmode,7)HereVPisoutputpeakvoltageacrosstheload.
ThermaldissipationbecomesmajorconcernwhendeliveringmorepowerintospeakerespeciallyinBTLmode.
ThemaximumallowedpowerdissipationcanbecalculatedbyequationbelowwhichisdeterminedbythermalresistanceofAA4006package.
8)AA4006Documentnumber:DS41330Rev.
3-420of24www.
diodes.
comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTApplicationInformation(Cont.
)HereTJMAXismaximumoperatingjunctiontemperatureof+150°C,TAisambienttemperature,θJAisthermalresistancefromjunctiontoambient.
ForTSSOP-24(EDP)package,itis65°C/Wgivenindatasheet.
AssumingTAis+25°C,themaximumallowedpowerdissipationisabout1.
92Waccordingtoequation8.
Thereisanotherequationaboutpowerdissipationwhichisdeterminedbypowersupplyvoltageandloadresistanceunderacertainapplication.
9)Theaboveequationexpressestotalpowerdissipation,dominatedbydualchannels,quiescentcurrent.
Itisaquadraticequationwiththenegativecoefficientofoutputvoltagevariation(VP),thereisalwaysamaximumshowedasbelow.
10)Ifpowerdissipationcalculatedbyapplicationislargerthanthepackagepermitted,itisnecessarytouselargercopperplaneunderthechip,orassembleanadditionalheatsink,oruseforced-aircoolingtokeepambienttemperaturearoundthechiplow,orincreaseloadresistance,ordecreasepowersupplyvoltage.
Forexample,assumingVDD=5.
0V,speakerloadRSP=4.
0,stereoinBTLmode,themaximumpowerdissipation,includes2channels,plusquiescentpowerdissipation,dominatedbyquiescentcurrent.
Thatistosay,tomakesureAA4006canoutputpowerintostereo4speakerscontinuously,themaximumambienttemperatureshouldbenomorethan,Themaximumpowerdissipationisachievedonlywhenoutputpowerper-channelequals2*VDD2/π*RSP.
Ifactualoutputpowerisnotthisdata,powerdissipationwillbelessthan2.
56W.
Whenjunctiontemperatureexceedsabout+165°C,OTSDfeaturewillbeenabled,thatturnsoffoutputamplifierstopreventdamagingthechip.
Oncejunctiontemperaturedropslowerthan+130°C,thechipwillworkagainautomatically.
Thereisanexposedthermalpadonthebottomofthechiptoprovidethedirectthermalpathfromdietoheatsink.
ItisrecommendedtousecopperonthesurfaceofPrintedCircuitBoard(PCB)asheatsink.
Todigsomematrixregularholesunderchip,removemaskofthisareacopper,andmakesuretokeepthemcontactwellwhensolderingonPCBarealsorecommended.
(SeeFigure10)AA4006Documentnumber:DS41330Rev.
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)Figure10.
RecommendedPCBLayoutforHeatSinkRecommendedPCBLayoutUsingwidetracesforpowersupply,BTLoutputstoreducepowerlossescausedbyparasiticresistanceisrecommended.
Itisalsorecommendedtoplacebypasscapacitor,andpowersupplydecouplecapacitorascloseaspossibletothechip.
Figure11.
TopRouteandCopperAA4006Documentnumber:DS41330Rev.
3-422of24www.
diodes.
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BottomRouteandCopperOrderingInformationPackageTemperatureRangePartNumberMarkingIDPackingRoHSCompliantRoHSCompliantandGreenRoHSCompliantRoHSCompliantandGreenTSSOP-24(EDP)-40to+85CAA4006GTR-E1AA4006GTR-G1AA4006GAA4006G-G1Tape&ReelAA4006Documentnumber:DS41330Rev.
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comAugust2018DiodesIncorporatedAA4006OBSOLETE–PARTDISCONTINUEDPARTOBSOLETE-NOALTERNATEPARTIMPORTANTNOTICEDIODESINCORPORATEDMAKESNOWARRANTYOFANYKIND,EXPRESSORIMPLIED,WITHREGARDSTOTHISDOCUMENT,INCLUDING,BUTNOTLIMITEDTO,THEIMPLIEDWARRANTIESOFMERCHANTABILITYANDFITNESSFORAPARTICULARPURPOSE(ANDTHEIREQUIVALENTSUNDERTHELAWSOFANYJURISDICTION).
DiodesIncorporatedanditssubsidiariesreservetherighttomakemodifications,enhancements,improvements,correctionsorotherchangeswithoutfurthernoticetothisdocumentandanyproductdescribedherein.
DiodesIncorporateddoesnotassumeanyliabilityarisingoutoftheapplicationoruseofthisdocumentoranyproductdescribedherein;neitherdoesDiodesIncorporatedconveyanylicenseunderitspatentortrademarkrights,northerightsofothers.
AnyCustomeroruserofthisdocumentorproductsdescribedhereininsuchapplicationsshallassumeallrisksofsuchuseandwillagreetoholdDiodesIncorporatedandallthecompanieswhoseproductsarerepresentedonDiodesIncorporatedwebsite,harmlessagainstalldamages.
DiodesIncorporateddoesnotwarrantoracceptanyliabilitywhatsoeverinrespectofanyproductspurchasedthroughunauthorizedsaleschannel.
ShouldCustomerspurchaseoruseDiodesIncorporatedproductsforanyunintendedorunauthorizedapplication,CustomersshallindemnifyandholdDiodesIncorporatedanditsrepresentativesharmlessagainstallclaims,damages,expenses,andattorneyfeesarisingoutof,directlyorindirectly,anyclaimofpersonalinjuryordeathassociatedwithsuchunintendedorunauthorizedapplication.
ProductsdescribedhereinmaybecoveredbyoneormoreUnitedStates,internationalorforeignpatentspending.
ProductnamesandmarkingsnotedhereinmayalsobecoveredbyoneormoreUnitedStates,internationalorforeigntrademarks.
ThisdocumentiswritteninEnglishbutmaybetranslatedintomultiplelanguagesforreference.
OnlytheEnglishversionofthisdocumentisthefinalanddeterminativeformatreleasedbyDiodesIncorporated.
LIFESUPPORTDiodesIncorporatedproductsarespecificallynotauthorizedforuseascriticalcomponentsinlifesupportdevicesorsystemswithouttheexpresswrittenapprovaloftheChiefExecutiveOfficerofDiodesIncorporated.
Asusedherein:A.
Lifesupportdevicesorsystemsaredevicesorsystemswhich:1.
areintendedtoimplantintothebody,or2.
supportorsustainlifeandwhosefailuretoperformwhenproperlyusedinaccordancewithinstructionsforuseprovidedinthelabelingcanbereasonablyexpectedtoresultinsignificantinjurytotheuser.
B.
Acriticalcomponentisanycomponentinalifesupportdeviceorsystemwhosefailuretoperformcanbereasonablyexpectedtocausethefailureofthelifesupportdeviceortoaffectitssafetyoreffectiveness.
Customersrepresentthattheyhaveallnecessaryexpertiseinthesafetyandregulatoryramificationsoftheirlifesupportdevicesorsystems,andacknowledgeandagreethattheyaresolelyresponsibleforalllegal,regulatoryandsafety-relatedrequirementsconcerningtheirproductsandanyuseofDiodesIncorporatedproductsinsuchsafety-critical,lifesupportdevicesorsystems,notwithstandinganydevices-orsystems-relatedinformationorsupportthatmaybeprovidedbyDiodesIncorporated.
Further,CustomersmustfullyindemnifyDiodesIncorporatedanditsrepresentativesagainstanydamagesarisingoutoftheuseofDiodesIncorporatedproductsinsuchsafety-critical,lifesupportdevicesorsystems.
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