Thisisinformationonaproductinfullproduction.
May2012Rev31/14
1
TDA7387
4x41Wquadbridgecarradioamplifier
Datasheet−productiondata
Features
■Highoutputpowercapability:
–4x41W/4max.
–4x22W/4@14.4V,1kHz,10%
■Lowdistortion
■Lowoutputnoi
■Standbyfunction
■Mutefunction
■voltagedetection
■Lowexternalcomponentcount:
–Internallyfixedgain(26dB)
–Noexternalcompensation
–Nobootstrapcapacitors
■Protections:
–OutputshortcircuittoGND,toV
S
,across
theload
–Veryinductiveloads
–Overratingchiptemperaturewithsoft
thermallimiter
–Loaddumpvoltage
–FortuitousopenGND
–Reverdbattery
–ESD
Description
TheTDA7387isanABclassaudiopower
amplifier,packagedinFlexiwatt25anddesigned
forhighendcarradioapplications.
BadonafullycomplementaryPNP/NPN
configuration,theTDA7387allowsarailtorail
outputvoltageswingwithnoneedofbootstrap
remelyreducedboundary
componentscountallowsverycompactts.
Flexiwatt25
summary
OrdercodePackagePacking
TDA7387Flexiwatt25Tube
ContentsTDA7387
2/14Rev3
Contents
.6
6
6
8
9
3.1Biasingan家常乱炖 10
10
11
.11
TDA7387Listoftables
Rev33/14
Listoftables
ListoffiguresTDA7387
4/14Rev3
Listoffigures
nection(topview)...................................................5
voltage(4)..........................................9
/10
TDA7387Blockandpinconnectiondiagrams
Rev35/14
1Blockandpinconnectiondiagrams
iagram
nection(topview)
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ElectricalspecificationsTDA7387
6/14Rev3
2Electricalspecifications
2.1Absolutemaximumratings
2.2Thermaldata
2.3Electricalcharacteristics
V
S
=14.4V;f=1kHz;R
g
=600;R
L
=4;T
amb
=25C;Refertothetestandapplication
diagram(Figure3),unlessotherwispecified.
temaximumratings
SymbolParameterValueUnit
V
S
Operatingsupplyvoltage18V
V
S(DC)
DCsupplyvoltage28V
V
S(pk)
Peaksupplyvoltage(t=50ms)50V
I
O
Outputpeakcurrent:
Repetitive(dutycycle10%atf=10Hz)
Nonrepetitive(t=100s)
4.5
5.5
A
A
P
tot
Powerdissipation,(T
ca
=70C)80W
T360装机
j
Junctiontemperature150C
T
stg
Storagetemperature–55to150C
ldata
SymbolParameterValueUnit
R
thj-ca
Thermalresistancejunction-to-camax.1C/W
icalcharacteristics
I
q1
Quiescentcurrent--180300mA
V
OS
Outputofftvoltage---100mV
G
v
Voltagegain-252627dB
P
o
Outputpower
THD=10%
THD=1%
20
-
22
18
-W
P
omax.
power
(1)
V
S
=14.4V3337-
W
V
S
=15.2V-41-
THDDistortionP
o
=4W-0.040.3%
e
No
Outputnoi
"A"Weighted
Bw=20Hzto20kHz
-
50
65150
V
V
TDA7387Electricalspecifications
Rev37/14
rdtestandapplicationcircuit
SVRSupplyvoltagerejectionf=100Hz5065-dB
f
cl
Lowcut-offfrequency--20-Hz
f
ch
Highcut-offfrequency-75-kHz
R
i
Inputimpedance-70100-k
C
T
Crosstalkf=1kHz5070-dB
I
SB
Standbycurrent
consumption
Vs
tandby
=0V--15A
V
SBout
Standbyoutthreshold
voltage
(Amp:on)3.5--V
V
SBIN
Standbyinthresholdvoltage(Amp:o动物生理学 ff)--1.5V
A
M
MuteattenuationV
O
=1Vrms8090-dB
V
Mout
Muteoutthresholdvoltage(Amp:play)3.5--V
V
Min
Muteinthresholdvoltage(Amp:mute)--1.5V
I
m(L)
MutingpincurrentV
MUTE
=1.5V(sourcecurrent)51016A
tedsquarewaveoutput.
icalcharacteristics(continued)
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ElectricalspecificationsTDA7387
8/14Rev3
2.4PCBandcomponentlayout
ReferredtoFigure3:Standardtestandapplicationcircuit.
entsandtopcopperlayer
copperlayer
TDA7387Electricalspecifications
Rev39/14
2.5Electricalcharacteristiccurves
volt香辣肉丝的做法 age
entoutputvoltagevs.
supplyvoltage
voltage
(4)
power
issipationandefficiency
power
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ApplicationhintsTDA7387
10/14Rev3
3Applicationhints
ReferredtothecircuitofFigure3.
3.1BiasingandSVR
AsshownbyFigure12,alltheTDA7387’smainctions,suchasInputs,OutputsANDAC-
GND(pin16)areinternallybiadathalfsupplyvoltagelevel(Vs/2),whichisderivedfrom
theSupplyVoltageRejection(SVR)waynocurrentflowsthroughtheinternal
-GNDiscommontoallthe4amplifiersandreprentsthe
connectionpointofalltheinvertinginputs.
BothindividualinputsandAC-GNDareconnectedtoVs/2(SVR)bymeansof100k
resistors.
Toensureproperoperationandhighsupplyvoltagerejection,itisoffundamental
importancetoprovideagoodimpedancematchingbetweenInputsandAC-GROUND
pliesthatC
1
,C
2
,C
3
,C
4
,C
5
capacitorshavetocarrythesame
nominalvalueandtheirtoleranceshouldneverexceed10%.
Besidesitscontributiontotheripplerejection,theSVRcapacitorgovernstheturnON/OFF
timequenceand,conquently,playsanesntialroleinthepopoptimizationduring
ON/enientlyrvebothneeds,itsminimumrecommendedvalue
is10F.
/outputbiasing.
3.2Inputstage
TheTDA7387’sinputsareground-compatibleandcanstandveryhighinputsignals
(8Vpk)withoutanyperformancesdegradation.
Ifthestandardvaluefortheinputcapacitors(0.1F)isadopted,t留守男人 helowfrequencycut-off
willamountto16Hz.
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TDA7387Applicationhints
Rev311/14
3.3Standbyandmuting
ed,astraightconnectionto
tionallow-powertransistorscanbe
employedtodrivemutingandstand-bypinsinabnceoftrueCMOSportsor
microprocessors.R-Ccellshavealwaystobeudinordertosmoothdownthetransitions
forpreventinganyaudibletransientnois.
SinceaDCcurrentofabout10Anormallyflowsoutofpin22,themaximumallowable
muting-riesresistance(R
2
)is70k,whichissufficientlyhightopermitamutingcapacitor
reasonablysmall(about1F).
IfR
2
ishigherthanrecommended,theinvolvedriskwillbethatthevoltageatpin22mayri
toabovethe1.5Vthresholdvoltageandthedevicewillconquentlyfai扁桃斑鸠菊 ltoturnOFFwhen
themutelineisbroughtdown.
Aboutthestand-by,thetimeconstanttobeassignedinordertoobtainavirtuallypop-free
transitionhastobeslowerthan2.5V/ms.
3.4Stabilityandlayoutconsiderations
Ifproperlylayoutedandhookedtostandardcar-radiospeakers,theTDA7387willbe
intrinsic
thehighnumberofchannelsinvolved,thistranslatesintoaveryremarkablecomponents
savingifcomparedtosimilardevicesonthemarket.
Tosimplifypc-boardlayoutdesigns,eachamplifierstagehasitsownpowerground
externallyaccessible(pins2,8,18,24)andonesupplyvoltagepinforeachcoupleofthem.
Evenmoreimportant,thismakesitpossibletoachievethehighestpossibledegreeof
parationamongthechannels,withremarkablebenefitsintermsofcross-talkand
distortionfeatures.
Aboutthelayoutgrounding,itisparticularlyimportanttoconnecttheAC-GNDcapacitor(C
5
)
tothesignalGND,ascloaspossibletotheaudioinputsground:thiswillguaranteehigh
rejectionofanycommonmodespurioussignals.
TheSVRcapacitor(C
6
)hasalsotobeconnectedtothesignalGND.
Supplyfilteringelements(C
7
,C
8
)havenaturallytobeconnectedtothepower-groundand
locatedascloaspossibletotheVspins.
Pin1,whichismechanicallyattachedtothedevice’stab,needstobetiedtothecleanest
powergroundpointinthepc-board,whichisgenerallynearthesupplyfilteringcapacitors.
PackageinformationTDA7387
12/14Rev3
4Packageinformation
Inordertomeetenvironmentalrequirements,SToffersthedevicesindifferentgradesof
ECOPACK
packages,K
specifications,gradedefinitionsandproductstatusareavailableat:.
ECOPACK
isanSTtrademark.
att25mechanicaldataandpackagedimensions
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TDA7387Revisionhistory
Rev313/14
5Revisionhistory
ntrevisionhistory
DateRevisionChanges
17-Nov-20081Initialrelea.
22-D补脾中药 ec-20112UpdatedFeaturesonpage1andTable4:Electricalcharacteristics.
23-May-20123
Updated:
Featuresonpage1;
Table4:Electricalcharacteristicsonpage6.
CorrectedtypeterrorinSection3.4:Stabilityandlayout
considerations.
TDA7387
14/14Rev3
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