UNISONIC TECHNOLOGIES CO.

, LTD
TDA2003 LINEAR INTEGRATED CIRCUIT
10W CAR RADIO AUDIO AMPLIFIER

■ DESCRIPTION

The UTC TDA2003 is a monolithic audio power amplifier 1

integrated circuit.
T
O-220B
■ FEATURES

*Very Low External Component Required.

*High Current Output ( up to 3 A).
*Low Harmonic and Crossover Distortion.
*Built-in Over Temperature Protection. 1
*Short Circuit Protection Between all Pins.

■ ORDERING INFORMATION
Ordering
Number Package Packing
Normal Lead Free Halogen Free
TDA2003- TDA2003L- TDA2003G- TO- Tube
TA5-T TA5-T TA5-T 220-5
TDA2003- TDA2003L- TDA2003G- TO- Tube
TB5-T TB5-T TB5-T 220B

■ PIN DESCRIPTION

PIN PIN
NO. NAME
1 Non inverting input
2 Inverting input
3 Ground
4 Output
5 Supply Voltage

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Copyright © 2011 Unisonic Technologies Co., Ltd QW-R107-002,F
TDA2
003 LINEAR INTEGRATED

■ BLOCK DIAGRAM

1 2
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003 LINEAR INTEGRATED

■ ABSOLUTE MAXIMUM RATINGS (Ta=25℃, unless otherwise specified.)

PARAMET SYMB RATING U
ER OL S NI
T
Peak Supply Voltage Vss 40 V
DC Supply Voltage Vss 28 V
Operating Supply Voltage Vss 18 V
Repetitive 3.5 A
Output Peak Current Non Repetitive IO(PEAK) 4.5 A
PD 20 W
Power Dissipation at Tc = 90°C
Storage and Junction Temperature TSTG -40 ~
+150 °C
Note: Absolute maximum ratings are those values beyond which the device could be permanently
damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

■ ELECTRICAL CHARACTERISTICS

(Ta=25°C, Refer to the test circuit, Vs=±16V, unless otherwise specified.)

PARAMETER SYMB TEST CONDITIONS M TY MA UN

OL IN P X IT
DC CHARACTERISTICS
Supply Voltage Vss 8 18 V
Quiescent Output Voltage VOUT 6. 6. 7.7 V
1 9
Quiescent Drain Current ID 4 50 m
4 A
AC CHARACTERISTICS
5. 6
RL=4Ω 5
THD=10% 9 1
Output Power POUT RL=2Ω W
, 0
f=1kHz 7.
RL=3.2Ω 5
1
RL=1.6Ω 2
POUT=0.5W, 1
RL=4Ω 4
Input Sensitivity VI f=1kHz POUT=6W, m
5
5 V
RL=4Ω
POUT=0.5W, 1
RL=2Ω 0

POUT=10W, 5
RL=2Ω 0

Input Saturation Voltage VI(RMS) 3 m

0 V
0
Frequency Response(-3dB) F 4 15 H
POUT=1W, RL=4Ω 0 00 z
0
POUT=0.05 ~ 4.5W, 0.
Total Harmonic Distortion THD f=1k RL=4Ω 15 %
Hz
POUT=0.05 ~ 7.5W, 0.
RL=2Ω 15

Input Resistance(Pin 1) RI open loop, f=1kHz 7 15 k

0 0 Ω
Input Noise Current iN 6 20 p
0 0 A
Input Noise Voltage eN 1 5
μ
V
TDA2
003 f=1kHz
LINEAR INTEGRATED
8 d
Open Loop Voltage Gain Gvo 0 B
f=10kHz 6 d
0 B
Closed Loop Voltage Gain Gvc 3 4 40. d
f=1kHz, RL=4Ω 9. 0 3 B
3
6
Efficiency, f=1kHz η POUT=6W, RL=4Ω 9 %
6
POUT=10W, RL=2Ω 5
f=100Hz,
Supply Voltage Rejection SVR VRUPPLE=0.5V 3 3 d
0 6 B
RG=10kΩ, RL=4Ω
 TDA2
003 LINEAR INTEGRATED

■ TEST CIRCUIT

AC Test Circuit

1
0
0

DC Test Circuit
 TDA2
003 LINEAR INTEGRATED

■ TYPICAL APPLICATION CIRCUIT

20W Bridge Configuration Application

The Values of the capacitors C3 and C4 are different to optimize the SVR (Typ. 40dB)

■ TYPICAL APPLICATION CIRCUIT

Low Cost Bridge Configuration Application Circuit(POUT=18W)

 TDA2
003 LINEAR INTEGRATED

■ BUILT-IN PROTECTION SYSTEMS

LOAD DUMP VOLTAGE SURGE

The UTC TDA2003 has a circuit which enables it to withstand a voltage pulse train, on pin 5.
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 head within the limits.
A suggested LC network. With this network, a train of pulses with amplitude up to 120V and width
of 2ms 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.

SHORT CIRCUIT (AC and DC Conditions)

The UTC TDA2003 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 connected in series with the supply).
The feature is added to avoid destruction if, during fitting to the car, a mistake on 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 UTC TDA2003 protection diodes are included to avoid any damage.

INDUCTIVE LOAD
A protection diode is provide between pin 4 and pin 5(see the internal schematic diagram) to allow
use of the UTC TDA2003 with inductive loads. In particular, the UTC TDA2003 can drive a coupling
transformer for audio modulation.

DC VOLTAGE
The maximum operating DC voltage on the UTC TDA2003 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.
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003 LINEAR INTEGRATED

■ BUILT-IN PROTECTION SYSTEMS(Cont.)

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),or an excessive 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 case of excessive junction temperature: all that happens is that Po ( and therefore
PD) and Id are reduced.

■ COMPONENTS USAGE SUGGESTION

The recommended values of the components are those shown on typical application circuit
Different values can be used. The following table can help the designer.

COMPONE RECOMMEND PURPOSE LARGE THAN SMALLER THAN

NT ED RECOMMENDED RECOMMENDED
VALUE VALUE VALUE
R1 (Gv-1)*R2 gain setting. increase of drain
current
R2 gain and SVR Decrease of SVR
2.2Ω setting.
Danger of oscillation
R3 Frequency at high frequencies
1Ω with inductive loads.
stability
Poor high
Rx ≈20R2 Upper frequency frequencies Danger of
cutoff attenuation oscillation
Noise at
C1 2.2μF Input DC switch-on
decoupling switch-off
C2 Ripple rejection Decrease of SVR
470μF
C3 Supply voltage Danger of
0.1μF bypass oscillation
Higher low
C4 1000μF Supply voltage frequenc
bypass y cutoff
Danger of
C5 Frequency oscillation at high
0.1μF frequencies with
stability
inductive loads.
Cx Upper frequency Lower bandwidth Larger bandwidth
≈1/ cutoff
(2π*B*R1
)
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003 LINEAR INTEGRATED

■ TYPICAL CHARACTORISTICS
Quiescent output voltage vs.Supply Quiescent drain current
voltage vs.Supply
voltage

8 80

6 60

4 40

2 20
0
0
8 10
12 14 16 8 10 12 14 16

Vs(V) Vs(V)

Output power vs.Supply voltage Output power vs.load resistance

Gv= Gv=
40d 40d
20 16
V
s=
15 12 16

8 Vs
10

5 4 V

0
0
0 5 10 15 20 0 2 4 6 8

Vs(V) R
L

(
Ω
)
Gain vs. Input sensitivity Gain vs. Input sensitivity
58 58
VS=1 VS=1
54 4.4V 54
4.4V
52 f= 52
f=
48 48

44 44

40 40
POU
36 36 POUT

32 32

28 28
POUT
24 24 POUT

2 2
0 0
10 1000 10 1000
100 100

VI (RMS) VI (RMS)
TDA2003 LINEAR INTEGRATED
 TYPICAL CHARACTORISTICS
(Cont.)

T
T
H
H
D
D

S
S
V
V
R
R

P
P η
D (
D
TDA2003 LINEAR INTEGRATED
 TYPICAL CHARACTORISTICS
(Cont.)
Maximum Power dissipation and Maximum allowable
supply voltage(sine wave dissipation and
operation) ambient temperature

20 20 infinite

15
P 15
P
D
D
10 10

1
5 5 0
℃
0 0
0 0
5 15 20 50 100 150 200
10 R
Vs(V) Ta (℃)

Typical values of capacitor(Cx) for

different values of frequency response

100

B
=1
0k
C
x
10
B=

R2
1
36 40
44 48

Gv (dB)

UTC assumes no responsibility for equipment failures that result from using products at
values that exceed, even momentarily, rated values (such as maximum ratings, operating
condition ranges, or other parameters) listed in products specifications of any and all UTC
products described or contained herein. UTC products are not designed for use in life
support appliances, devices or systems where malfunction of these products can be
reasonably expected to result in personal injury. Reproduction in whole or in part is
prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to