
TDA2003
10W CAR RADIO AUDIO AMPLIFIER
DESCRIPTION The TDA 2003 has improved 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 protectionagainst DC and AC short circuit between all pins and ground, thermal over-range, load dump voltage surge up to 40V and fortuitous open ground.
October 1998
Symbol
Parameter
Value
Unit
V
S
Peak supply voltage (50ms)
40
V
V
S
DC supply voltage
28
V
V
S
Operating supply voltage
18
V
I
O
Output peak current (repetitive)
3.5
A
I
O
Output peak current (non repetitive)
4.5
A
Ptot
Power dissipation at Tcase = 90
°
C
20
W
T
stg
, T
j
Storage and junction temeperature
-40 to 150
°
C
ABSOLUTE MAXIMUM RATINGS
TEST CIRCUIT
PENTAWATT
ORDERING NUMBERS : TDA 2003H
TDA 2003V
1/10
Symbol
Parameter
Value
Unit
R
th-j-case
Thermal resistance junction-case
max
3
°
C/W
THERMAL DATA
2/10
PIN CONNECTION (top view)
SCHEMATIC DIAGRAM
TDA2003
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
DC CHARACTERISTICS (Refer to DC test circuit)
V
s
Supply voltage
8
18
V
V
o
Quiescent output voltage (pin 4)
6.1
6.9
7.7
V
I
d
Quiescent drain current (pin 5)
44
50
mA
AC CHARACTERISTICS (Refer to AC test circuit, Gv = 40 dB)
P
o
Output power
d = 10% f = 1 kHz
R
L
= 4
Ω¦
R
L
= 2
Ω¦
R
L
= 3.2
Ω¦
R
L
= 1.6
Ω¦
5.5
9
6
10
7.5
12
W W W W
V
i(rms)
Input saturation voltage
300
mV
V
i
Input sensitivity
f = 1 kHz P
o
= 0.5W
P
o
= 6W
P
o
= 0.5W
P
o
10W
R
L
= 4
Ω¦
R
L
= 4
Ω¦
R
L
= 2
Ω¦
R
L
= 2
Ω¦
14 55 10 50
mV mV mV mV
ELECTRICAL CHARACTERISTICS ( V
s
= 14.4V, T
amb
= 25
°
C unless otherwise specified)
DC TEST CIRCUIT
AC TEST CIRCUIT
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TDA2003
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Figure 1. Quiescent output voltage vs. supply voltage
Figure 2. Quiescent drain current vs. supply voltage
Figure 3. Output power vs. supply voltage
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
B
Frequency response (-3 dB)
P
o
= 1W
R
L
= 4
Ω¦
40 to 15,000
Hz
d
Distortion
f = 1 kHz P
o
= 0.05 to4.5W R
L
= 4
Ω¦
P
o
= 0.05 to 7.5W R
L
= 2
Ω¦
0.15 0.15
% %
R
i
Input resistance (pin 1)
f = 1 kHz
70
150
k
Ω¦
G
v
Voltage gain (open loop)
f = 1 kHz f = 10 kHz
80 60
dB dB
G
v
Voltage gain (closed loop)
f = 1 kHz R
L
= 4
Ω¦
39.3
40
40.3
dB
e
N
Input noise voltage
(0)
1
5
µ
V
i
N
Input noise current
(0)
60
200
pA
η
Efficiency
f = 1 Hz P
o
= 6W
P
o
= 10W
R
L
= 4
Ω¦
R
L
= 2
Ω¦
69 65
% %
SVR
Supply voltage rejection
f = 100 Hz V
ripple
= 0.5V
R
g
= 10 k
Ω¦
R
L
= 4
Ω¦
30
36
dB
ELECTRICAL CHARACTERISTICS (continued)
(0) Filter with noise bandwidth: 22 Hz to 22 kHz
TDA2003
Figure 4. Output power vs. load resistance R
L
Fi gure 5. Gain vs. inp ut sensivity
Figure 6. Gain vs. input sensivity
F i gu re 7. Di st ort ion vs. output power
Fi g ure 8. D isto r tion vs. frequency
Figure 9. Supply voltage rejection vs. voltage gain
Figure 10. Supply voltage rejection vs. frequency
Figure 11. Power dissipa- tion and efficiency vs. output power (R
L
= 4
Ω¦
)
Figure 12. Powe r dissipa- tion and efficiencyvs. output power (R
L
= 2
Ω¦
)
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TDA2003
6/10
Figure 13. Maximum power dissipation vs. supply voltage (sine wave operation)
Figure 14. Maximum allowable power dissipation vs. ambient temperature
Figure 15. Typical values of capacitor (C
X
) for different
values of frequency reponse (B)
Figure 16. Typical application circuit
Figure 17. P.C. board and component layout for the circuit of fig. 16 (1 : 1 scale)
APPLICATION INFORMATION
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.
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.
TDA2003
Short-circuit (AC and DC conditions)
The TDA 2003 can withstand a permanent short- circuit on the output for a supply voltage 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 con- nected 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 pro- tection diodes are included to avoid any damage.
Inductive load
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.
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. However 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 perma-
nent), oran excessive ambient temperature can be easily withstood.
2) the heat-sink can have a smaller factor com-
pared with that of a conventionalcircuit. There is no device damage in the case of ex- cessive junction temperature: all that happens is that P
o
(and therefore P
tot
) and I
d
are reduced.
Figure 20. Output power and dr a in
cu r re n t
vs .
c ase
temperature (R
L
= 4
Ω¦
)
Figure 21. Output power and d r ai n
cu r re n t
vs .
c as e
temperature (R
L
= 2
Ω¦
)
Figure 18.
Figure 19.
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TDA2003
Component
Recommmended
value
Purpose
Larger than
recommended value
Smaller than
recommended value C1
C1
2.2
µ
F
Input DC decoupling
Noise at switch-on, switch-off
C2
470
µ
F
Ripple rejection
Degradation of SVR
C3
0.1
µ
F
Supply bypassing
Danger of oscillation
C4
1000
µ
F
Output coupling to load
Higher low frequency cutoff
C5
0.1
µ
F
Frequency stability
Danger of oscillation at high frequencies with inductive loads
C
X
•‰…
1
2
Ï€
B R1
Upper frequency cutoff
Lower bandwidth
Larger bandwidth
R1
(G
v
-1)
•
R2
Setting of gain
Increase of drain current
R2
2.2
Ω¦
Setting of gain and SVR
Degradation of SVR
R3
1
Ω¦
Frequency stability
Danger of oscillation at high frequencies with inductive loads
R
X
•‰…
20 R2
Upper frequency cutoff
Poor high frequency attenuation
Danger of oscillation
PRATICAL CONSIDERATION
Printed circuit board 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 ratherhigh current flows.
Assembly suggestion No electrical insulation is required between 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. The following table is intended to aid the car-radio designer.
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TDA2003
Pentawatt V
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
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.)
L
L1
A
C
L5
D1
L2
L3
E
M1
M
D
H3
Dia.
L7
L6
F1
H2
F
G G1
E1
F
E
L9
V4
R
R
R
RESIN BETWEEN
LEADS
H1
V3
H2
L8
V
V
V1
B
V
V
V4
V4
OUTLINE AND
MECHANICAL DATA
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TDA2003
Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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