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®
TDA2003
10W CAR RADIO AUDIO AMPLIFIER
DESCRIPTION
The TDA 2003 has improv ed performance with the
same pin configuration as the TDA 2002.
The additional features of TDA 2002, very low
number of external components, ease of assembly ,
space and cost saving, are maintained.
The device provides a high output current capability
(up to 3.5A) very low harmonic and cross-over
distortion.
Completely safe operation is guaranteed due to
protection against DC and AC s hort circuit between
ORDERING NUMBERS :
TDA 2003V
all pins and ground, thermal over-range, load dump
voltage surge up to 40V and fortuitous open
ground.
ABSOL UT E MAXIMUM RATIN G S
Symbol Parameter Value Unit
V
S
V
S
V
S
I
O
I
O
Ptot Power dissipation at Tcase = 90°C 20 W
, T
T
stg
Peak supply voltage (50ms) 40 V
DC supply voltage 28 V
Operating supply voltage 18 V
Output peak current (repetitive) 3.5 A
Output peak current (non repetitive) 4.5 A
Storage and junction temeperature -40 to 150 °C
j
PENTAWA TT
TDA 2003H
TEST CIRCUIT
October 1998
1/10
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TDA 2003
PIN CONNECTION
(top view)
SCHEMATIC DIAGRAM
THERMAL DATA
Symbol Parameter Value Unit
Thermal resistance junction-case max 3
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R
th-j-case
C/W
°
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TDA 2003
DC TEST CIRCUIT
AC TEST CIRCUIT
ELECTRICAL CHARACTERISTICS
( V
= 14.4V, T
s
= 25 °C unless otherwise specified)
amb
Symbol Parameter Test conditions Min. Typ. Max. Unit
DC CHARACTERISTICS
V
V
I
Supply voltage 8 18 V
s
Quiescent output voltage (pin 4) 6.1 6.9 7.7 V
o
Quiescent drain current (pin 5) 44 50 mA
d
AC CHARACTERISTICS
V
P
i(rms)
V
Output power d = 10%
o
Input saturation voltage 300 mV
Input sensitivity f = 1 kHz
i
(Refer to DC test circuit)
(Refer to AC test circuit, Gv = 40 dB)
f = 1 kHz
P
= 0.5W
o
P
= 6W
o
= 0.5W
P
o
P
10W
o
R
R
R
R
R
R
R
R
= 4
L
= 2
L
= 3.2
L
= 1.6
L
= 4
L
= 4
L
= 2
L
= 2
L
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
5.5
9
6
10
7.5
12
14
55
10
50
W
W
W
W
mV
mV
mV
mV
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TDA 2003
ELECTRICAL CHARACTERISTICS
(continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 1W
P
B Frequency response (-3 dB)
d Distortion
R
G
G
e
i
η
i
v
v
N
N
Input resistance (pin 1) f = 1 kHz 70 150
Voltage gain (open loop) f = 1 kHz
Voltage gain (closed loop)
Input noise voltage (0) 1 5
Input noise current (0) 60 200 pA
Efficiency f = 1 Hz
SVR Supply voltage rejection
o
= 4
R
Ω
L
f = 1 kHz
P
= 0.05 to4.5W RL = 4
o
P
= 0.05 to 7.5W RL = 2
o
f = 10 kHz
f = 1 kHz
R
= 4
Ω
L
= 6W
P
o
= 10W
P
o
f = 100 Hz
= 0.5V
V
ripple
= 10 k
R
g
40 to 15,000 Hz
Ω
Ω
R
= 4
Ω
L
R
= 2
Ω
L
RL = 4
Ω
Ω
0.15
0.15
80
60
39.3 40 40.3 dB
69
65
30 36 dB
%
%
k
Ω
dB
dB
V
µ
%
%
(0) Filter with noise bandwidth: 22 Hz to 22 kHz
Figure 1. Quiescent output
voltage vs. supply voltage
Figure 2. Quiescent drain
current vs. supply voltage
Figure 3. Output power vs.
supply voltage
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TDA2003
Figure 4. Output power vs.
load resistance R
L
Figure 7. Distortion vs.
output power
Figure 5. Gain vs. input
sensivity
Figure 8. Distortion vs.
frequency
Figure 6. Gain vs. input
sensivity
Figure 9. Supply voltage
rejection vs. voltage gain
Figure 10. Supply voltage
rejection vs. frequency
Figure 11. Power dissipation and efficiency vs. output
power (R
= 4Ω)
L
Figure 12. Power dissipation and efficiency vs. output
power (R
= 2Ω)
L
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TDA 2003
Figure 13. Maximum power
dissipa tion vs. supply voltage
(sine wave operation)
APPLICATION INFORMATION
Figure 16. Typical application
circuit
Figure 14. M axim um allowable
power dissipation vs. ambient
temperature
Figure 15. Typical values of
capacitor (C
) for different
X
values of frequency reponse
(B)
Figure 1 7. P.C. board and component l ayout for the circuit of
fig. 16 (1 : 1 scale)
BUILT-IN PROTECTION SYSTEMS
Load dump voltage surge
The TDA 2003 has a circuit which enables it to
withstand a voltage pulse train, on pin 5, of the type
shown in fig. 19.
If the supply voltage peaks to more than 40V, then
an LC filter must be inserted between the supply
and pin 5, in order to assure that the pulses at pin
5 will be held within the limits shown in fig. 18.
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A suggested LC network is shown in fig. 19. With
this network, a train of pulses with amplitude up to
120V and width of 2 ms can be applied at point A.
This type of protection is ON when the supply
voltage (pulsed or DC) exceeds 18V. For this reason
the maximum operating supply voltage is 18V.
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Figure 18. Figure 19.
TDA2003
Short-circuit (AC and DC conditions)
The TDA 2003 can withstand a permanent short circuit on the output for a supply v oltage up to 16V.
Polarity inversion
High current (up to 5A) can be handled by the
device with no damage for a longer period than the
blow-out time of a quick 1A fuse (normally connected in series with the supply).
This feature is added to avoid destruction if, during
fitting to the car, a mistake on the connection of the
supply is made.
Open ground
When the radio is in the ON condition and the
ground is accidentally opened, a standard audio
amplifier will be damaged. On the TDA 2003 protection diodes are included to avoid any damage .
Inductive loa d
A protection diode is provided between pin 4 and 5
(see the internal schematic diagram) to allow use
of the TDA 2003 with inductive loads.
Figure 20. Output power and
drain current vs. case
temperature (R
= 4Ω)
L
In particular, the TDA 2003 can drive a coupling
transformer for audio modulation.
DC voltage
The maximum operating DC voltage on the TDA
2003 is 18V.
Howe ver the device can withstand a DC voltage up
to 28V with no damage. This could occur during
winter if two batteries were series connected to
crank the engine.
Thermal shut-down
The presence of a thermal limiting circuit offers the
following advantages:
1) an overload on the output (even if it is permanent), oran excessiv e ambient temperature can
be easily withstood.
2) the heat-sink can have a smaller factor compared with that of a conventional circuit.
There is no device damage in the case of excessive junction temperature: all that happens
is that P
(and therefore P
o
) and Id are reduced.
tot
Figure 21. Output power and
drain current vs. case
temperature (R
= 2Ω)
L
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TDA 2003
PRATICAL CONSIDERATION
Printed circuit boa rd
The layout shown in fig. 17 is recommended. If
different layouts are used, the ground points of
input 1 and input 2 must be well decoupled from
the ground of the output through which a rather high
current flows.
Assembly suggestion
No elect rical insu lation is r equir ed be tw een the
package and the heat-sink. Pin length should be as
short as possible. The soldering temperature must
not exceed 260°C for 12 seconds.
Application suggestions
The recommended component values are those
shown in the application circuits of fig. 16.
Different values can be used. T he following tab le is
intended to aid the car-radio designer.
Component
C1
C2
C3
C4
C5
C
X
R1
R2
R3
R
X
Recommmended
value
2.2 µF
470 µF
0.1 µF
1000 µF
0.1 µF
1
≅
2 π B R1
(Gv-1) • R2
2.2
Ω
1
Ω
20 R2
≅
Purpose
Input DC
decoupling
Ripple rejection Degradation of SVR
Supply bypassing Danger of oscillation
Output coupling to load
Frequency stability
Upper frequency cutoff Lower bandwidth Larger bandwidth
Setting of gain Increase of drain current
Setting of gain
and SVR
Frequency stability Danger of oscillation at
Upper frequency cutoff Poor high frequency
Larger than
recommended value
Degradation of SVR
high frequencies with
inductive loads
attenuation
Smaller than
recommended value C1
Noise at switch-on,
switch-off
Higher low frequency
cutoff
Danger of oscillation at
high frequencies with
inductive loads
Danger of oscillation
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TDA2003
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
mm inch
A 4.8 0.189
C 1.37 0.054
D 2.4 2.8 0.094 0.110
D1 1.2 1.35 0.047 0.053
E 0.35 0.55 0 .014 0.022
E1 0.76 1.19 0.030 0.047
F 0.8 1.05 0.031 0.041
F1 1 1.4 0.039 0.055
G 3.2 3.4 3.6 0.126 0.134 0.142
G1 6.6 6.8 7 0.260 0.268 0.276
H2 10.4 0.409
H3 10.05 10.4 0 .396 0.409
L 17.55 17.85 18.15 0.691 0.703 0.715
L1 15.55 15.75 15.95 0.612 0.620 0.628
L2 21.2 21.4 21.6 0.831 0.843 0.850
L3 22.3 22.5 22.7 0.878 0.886 0.894
L4 1.29 0.051
L5 2.6 3 0.102 0.118
L6 15.1 15.8 0.594 0.622
L7 6 6.6 0.236 0.260
L9 0.2 0.008
M 4.23 4.5 4.75 0.167 0.177 0.187
M1 3.75 4 4.25 0.148 0.157 0.167
V4 40˚ (typ.)
OUTLINE AND
MECHANICAL DATA
Pentawatt V
A
H3
B
H1
L
L1
L8
VV
C
L5
Dia.
L7
L6
D1
V1
R
D
L2
L3
RESIN BETWEEN
V3
R
R
V4
F1
LEADS
H2
E
M1
M
V4
GG1
F
L9
VV
H2
F
E1
E
V4
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TDA 2003
Information furnished is believed to be accurate and reliable. Howe v er , STMicroelectronics assumes no responsibility for the consequences of
use of such infor m ation nor for any infringement of patent s or other rights of third parties which may res ul t from its use. No license is granted
by implication or otherwise under any paten t or patent rights of STMicro electroni cs. Specification mentioned in this publication are subject to
change witho ut notice. This publication s upersedes and re places all inform ation previously supplied. STMicroel ectronics produ cts are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 1998 STMicroelectronics – Printed in Italy – All Rights Reserved
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