汽车功放

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谅解书-干生蚝怎么做好吃

汽车功放
2023年3月19日发(作者:许崇)

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

<5

<6

.6

6

6

8

9

<10

3.1Biasingan家常乱炖 10

10

11

.11

<12

<抽样方案 ....13

TDA7387Listoftables

Rev33/14

Listoftables

<.1

<6

<6

<入户申请书 .....6

<13

ListoffiguresTDA7387

4/14Rev3

Listoffigures

<5

nection(topview)...................................................5

<7

<.8

<8

<9

<9

voltage(4)..........................................9

<9

<9

<9

/10

<12

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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TOT

7

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TOT

H

H

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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362!#?'.$

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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MOLDINGPROTUSIONINCLUDED

DAMBARPROTUSIONNOTINCLUDED

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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

PleaReadCarefully:

InfooelectronicsNVanditssubsidiaries(“ST”)rervethe

righttomakechanges,corrections,modificationsorimprovements,tothisdocument,andtheproductsandrvicesdescribedhereinatany

time,withoutnotice.

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UNLESSOTHERWISESETFORTHINST’STERMSANDCONDITIONSOFSALESTDISCLAIMSANYEXPRESSORIMPLIED

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UNLESSEXPRESSLYAPPROVEDINWRITINGBYTWOAUTHORIZEDSTREPRESENTATIVES,STPRODUCTSARENOT

RECOMMENDED,AUTHORIZEDORWARRANTEDFORUSEINMILITARY,AIRCRAFT,SPACE,LIFESAVING,ORLIFESUSTAINING

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Informationinthisdocumentsuperdesandreplacesallinformationpreviouslysupplied.

ernamesarethepropertyoftheirrespectiveowners.

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