SGS Thomson Microelectronics TDA2004A Datasheet

10 + 10W STEREO AMPLIFIER FOR CAR RADIO

Its main featuresare :

Low distortion.
Low noise.
High reliabilityofthe chipand of thepackagewith

additionalsafetyduringoperationthanksto protec­tions against:

.OUTPUTAC SHORTCIRCUIT TO GROUND

.VERYINDUCTIVE LOADS

.OVERRATINGCHIP TEMPERATURE

.LOADDUMP VOLTAGESURGE

.FORTUITOUS OPENGROUND

Spaceandcostsaving:verylownumberofexter­nalcomponents,verysimple mounting systemwith
noelectricalisolation betweenthe packageand the
heatsink.

DESCRIPTION

The TDA2004Ais a classB dual audio power am­plifier in MULTIWATT



package specifically desi-

TDA2004A

MULTIWATT11

ORDERING NUMBER :TDA2004A

gnedforcarradioapplications;stereoamplifiersare
easily designed using this device that provides a
highcurrent capability(upto3.5A) andthatcandri­ve verylow impedanceloads(downto 1.6Ω ).

PIN CONNE CTIO N (top view)

March 1995

1/10

TD A200 4A

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

OpeartingSupply Voltage 18 V

V

S

DC SupplyVoltage 28 V

V

S

Peak Supply Voltage (for 50ms) 40 V

V

S

(*) Output Peak Current(non repetitive t = 0.1ms) 4.5 A

I

O

(*) Output Peak Current(repetitive f ≥ 10Hz) 3.5 A

I

O

PowerDissipation at T

P

tot

,T

T

j

(*) The max. output current is internally limited.

Storageand JunctionTemperature –40 to150 °C

stg

THERMAL DATA

Symbol Parameter Value Unit

R

th j-case

ThermalResistance Junction-case Max. 3 °C/W

=60°C30W

case

ELECTRICAL CHARACTERISTICS (Refer to the test circuit, T
Rt

h (heatsink)

=4°C/W, unless otherwise specified)

=25°C, GV= 50dB,

amb

Symbol Parameter Test Condition Min. Typ. Max. Unit

SupplyVoltage 8 18 V

V

S

QuiescentOutput Voltage VS = 14.4V

V

O

TotalQuiescent Drain Current VS=14.4V

I

d

Stand-byCurrent Pin 3 grounded 5 mA

I

SB

OutputPower (eachchannel) f = 1KHz, d = 10%

P

O

V

=13.2V

S

V

=13.2V

S

V

=14.4V

S

R

=4Ω

L

R

=3.2Ω

L

R

=2Ω

L

R

= 1.6Ω

L

=13.2V

V

S

R

=3.2Ω

L

R

= 1.6Ω

L

=16V; RL=2Ω 12 w

V

S

6.6

6.0

6
7
9

10

6
9

7.2

6.6
65

62

6.5

8

10(*)

11

6.5
10

7.8

7.2

120
120

d Distortion (each channel) f = 1KHz

V

=14.4V; RL=4Ω

S

P

= 50mW to 4W

O

V

=14.4V; RL=2Ω

S

P

= 50mW to 6W

O

V

=13.2V; RL= 3.2Ω

S

P

= 50mW to 3W

O

V

=13.2V; RL= 1.6Ω

S

P

= 50mW to 6W

O

CT Cross Talk V

Input SaturationVoltage 300 mV

V

i

=14.4V

S

V

= 4Vrms RL=4Ω

O

f = 1KHz
f = 10KHz R

g

=5KΩ

50
40

0.2

0.3

0.2

0.3

60
45

1
1
1
1

V
V

mA
mA

W
W
W
W

w
w

%
%
%
%

dB
dB

2/10

TD A 2004A

ELECTRICAL CHARACTERISTICS (continued

Symbol Parameter Test Condition Min. Typ. Max. Unit

InputResistance (non invertinginput) f = 1KHz 70 200 KΩ

R

i

Low Frequency Roll off (-3dB) RL=4Ω

f

L

HighFrequency Roll off (-3dB) RL= 1.6Ω to 4Ω 15 KHz

f

H

Voltagegain (open loop) f = 1KHz 90 dB

G

V

Voltagegain (closed loop) f = 1KHz 48 50 51 dB
closedloop gainmatching 0.5 dB
TotalInput noise Voltage Rg= 10KΩ (**) 1.5 5 µV

e

N

SVR Supply Voltage Rejection f

η Efficiency V

T

Thermal Shutdown Junction

J

Temperature

Notes : (*) 9.3W without Bootstrap

(**) BandwithFilter: 22Hz to 22KHz.

R

=2Ω

L

R

= 3.2Ω

L

R

= 1.6Ω

L

=100Hz; Rg= 10KΩ

ripple

C3 = 10µFV

= 14.4V f = 1KHz

S

R

=4Ω PO=6.5W

L

R

=2Ω PO= 10W

L

V

= 13.2V f = 1KHZ

S

R

=3.2Ω PO=6.5W

L

R

= 1.6Ω PO=10W

L

ripple

35 45 dB

=0.5Vrms

70
60

70
60

145 °C

35
50
40
55

Hz
Hz
Hz
Hz

%
%

%
%

Figure 1 : Test an d App lica tion Circ u it .

3/10

TD A200 4A

Figure 2 : P.C. B oard and Component layout of the fig. 1 (scale 1 : 1).

Figure3 : QuiescentOutputVoltagevs.

SupplyVoltage.

4/10

Figure4 : QuiescentDrainCurrentvs.

SupplyVoltage.

Figure 6 : Output Powervs.Supply Voltage.Figure5 : Distortion vs. OutputPower.

Figure7 : OutputPower vs. SupplyVoltage. Figure 8 : Distortion vs. Frequency.

TD A 2004A

Figure9 : Distortion vs. Frequency. Figure10 : SupplyVoltageRejection vs. C

.

3

5/10

TD A200 4A

Figure 11 : SupplyVoltageRejectionvs.

Frequency.

Figure13 : SupplyVoltageRejection vs.

Valuesof CapacitorsC

and C3.

2

Figure12 : SupplyVoltageRejection vs.

Valuesof CapacitorsC

andC3.

2

Figure 14 : Gain vs. InputSensitivity.

Figure15 : MaximumAllowable Power

Dissipationvs. Ambient Temperature.

6/10

Figure16 : TotalPower Dissipationand

Efficiencyvs. OutputPower.

TD A 2004A

Figure17 : TotalPower Dissipationand

Efficiency vs. OutputPower .

APPL ICATI ON SUGGESTI O N

Therecommendedvaluesofthecomponentsare thoseshownonapplicationcircuitof fig.1.Differentvalues
can beused ; the followingtable canhelp the designer.

Component Recomm. Value Purpose LargerThan Smaller Than

R1 120KΩ Optimization of the

output signal simmetry
R2, R4 1KΩ Closeloop gain
R3, R5 3.3Ω Decreaseof gain Increase of gain
R6, R7 1Ω Frequencystability Danger of oscillation

C1, C2 2.2µF InputDC decoupling Highturn-on delay High turn-on pop

C3 10µF Ripple Rejection Increaseof SVR.

C4, C6 100µF Boostrapping Increaseof distortion

C5, C7 100µF Feedback Input DC

C8, C9 0.1µF FrequencyStability Danger of oscillation.

C10, C11 1000µF to 2200µF OutputDC decoupling. Higher low-frequency

setting(*)

decoupling.

Smaller P

Increaseof gain Decreaseof gain

at high frequency with
inductive load

Increaseof the switch­on time.

max. SmallerPOmax.

O

Higher low frequency
cutoff. Increase of
noise

Degradation of SVR.

at low frequency

cut-off.

(*) The closed–loop gain must be higher than 26dB.

7/10

TD A200 4A

BUILT–IN PROTECTION SYSTEMS

LOADDUMP VOLTAGESURGE
TheTDA2004Ahasa circuit which enablesitto wi-

thstanda voltage pulsetrain, on pin 9, of the type
shownin Fig.19.

If thesupplyvoltage peaks to more than40 V, then
anLCfiltermustbeinsertedbetweenthesupplyand
pin9, in orderto assure thatthe pulsesat pin 9 will
be heldwithin thelimitsshown.

A suggestedLC networkis shownin Fig. 18. With
thisnetwork,atrainofpulsewithamplitudeupto120
V and with of 2 ms can be applied to point A. This
type of protection is ON when the supply voltage
(pulseorDC) exceeds18V.Forthisreasonthema­ximumoperatingsupply voltageis 18 V.

Figure 1 8.

POLARITYINVERSION
Highcurrent(up to10A) can behandledby thede-

vice with no damage for a longer period than the
blow-outtime of a quick 2 Afuse (normallyconnec­ted in series with thesupply).This featureis added
to avoiddestruction,if duringfittingto thecar, a mi­stakeon theconnectionof thesupplyis made.

OPENGROUND
Whenthe ratiois the ON conditionand the ground

is accidentally opened, a standard audio amplifier
will bedamaged.Onthe TDA2004Aprotectiondio­desare includedto avoidany damage.

INDUCTIVELOAD
A protection diode is provided to allow use of the

TDA2004Awith inductiveloads.
DCVOLTAGE
The maximum operating DC voltage on the

TDA2004Ais 18 V.
Howeverthe devicecan withstanda DCvoltageup

to28V withnodamage.Thiscouldoccurduringwin­ter iftwobatteriesareseriesconnectedtocrankthe
engine.

Figure 1 9.

SHORTCIRCUIT (ACconditions)
The TDA2004Acan withstandan accidental short-

circuit fromtheoutputto groundcausedbya wrong
connectionduringnormal working.

THERMALSHUT-DOWN
The presenceof a thermallimiting circuit offersthe

following advantages:

1)anoverloadontheoutput(evenif itispermanent),
or anexcessive ambienttemperaturecanbe easily
withstood.

2) the heatsinkcan have a smaller factorof safety
comparedwith that of a conventionalcircuit. There
is no device damagein the caseof excessivejun­ction temperature; all that happensis the P
thereforeP

)andIdarereduced.

tot

O

(and

Themaximumallowablepowerdissipationdepends
uponthesizeoftheexternalheatsink(i.e.itsthermal
resistance); fig. 15 shownthis dissipablepower as
a functionof ambienttemperaturefor differentther­malresistance.

8/10

MULTIWATT11 PACKAGE MECHANICAL DATA

TD A 2004A

DIM.

A 5 0.197
B 2.65 0.104
C 1.6 0.063
D 1 0.039
E 0.49 0.55 0.019 0.022
F 0.88 0.95 0.035 0.037
G 1.45 1.7 1.95 0.057 0.067 0.077

G1 16.75 17 17.25 0.659 0.669 0.679

H1 19.6 0.772
H2 20.2 0.795

L 21.9 22.2 22.5 0.862 0.874 0.886
L1 21.7 22.1 22.5 0.854 0.87 0.886
L2 17.4 18.1 0.685 0.713
L3 17.25 17.5 17.75 0.679 0.689 0.699
L4 10.3 10.7 10.9 0.406 0.421 0.429
L7 2.65 2.9 0.104 0.114

M 4.25 4.55 4.85 0.167 0.179 0.191

M1 4.73 5.08 5.43 0.186 0.200 0.214

S 1.9 2.6 0.075 0.102
S1 1.9 2.6 0.075 0.102

Dia1 3.65 3.85 0.144 0.152

MIN. TYP. MAX. MIN. TYP. MAX.

mm inch

9/10

TD A200 4A

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for
the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifica­tions mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information pre­viously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of SGS-THOMSON Microelectronics.

 1995 SGS-THOMSON Microelectronics - All Rights Reserved

MULTIWATT is a Registered Trademark of SGS-THOMSON Microelectronics

Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore -

SGS-THOMSON Microelectronics GROUP OF COMPANIES

Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A.

10/10