UNISONIC TECHNOLOGIES CO., LTD
TDA2003
LINEAR INTEGRATED CIRCUIT
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Copyright © 2011 Unisonic Technologies Co., Ltd QW-R107-002,F
10W CAR RADIO AUDIO AMPLIFIER
DESCRIPTION
The UTC TDA2003 is a monolithic audio power amplifier
integrated circuit.
FEATURES
*Very Low External Component Required.
*High Current Output ( up to 3 A).
*Low Harmonic and Crossover Distortion.
*Built-in Over Temperature Protection.
*Short Circuit Protection Between all Pins.
TO-220B
1
1
TO-220-5
ORDERING INFORMATION
Ordering Number
Normal Lead Free Halogen Free Package Packing
TDA2003-TA5-T TDA2003L-TA5-T TDA2003G-TA5-T TO-220-5 Tube
TDA2003-TB5-T TDA2003L-TB5-T TDA2003G-TB5-T TO-220B Tube
PIN DESCRIPTION
PIN NO. PIN NAME
1 Non inverting input
2 Inverting input
3 Ground
4 Output
5 Supply Voltage
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BLOCK DIAGRAM
12
3
4
5
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ABSOLUTE MAXIMUM RATINGS (Ta=25℃, unless otherwise specified.)
PARAMETER SYMBOL RATINGS UNIT
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
Power Dissipation at Tc = 90°C PD 20 W
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 SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
DC CHARACTERISTICS
Supply Voltage Vss 8 18 V
Quiescent Output Voltage VOUT 6.1 6.9 7.7 V
Quiescent Drain Current ID 44 50 mA
AC C HARAC TERISTICS
RL=4Ω 5.5 6
RL=2Ω 9 10
RL=3.2Ω 7.5
Output Power POUT THD=10%,
f=1kHz
RL=1.6Ω 12
W
POUT=0.5W, RL=4Ω 14
POUT=6W, RL=4Ω 55
POUT=0.5W, RL=2Ω 10
Input Sensitivity VI f=1kHz
POUT=10W, RL=2Ω 50
mV
Input Saturation Voltage VI(RMS) 300 mV
Frequency Response(-3dB) F POUT=1W, RL=4Ω 40 15000 Hz
POUT=0.05 ~ 4.5W, RL=4Ω 0.15
Total Harmonic Distortion THD f=1kHz POUT=0.05 ~ 7.5W, RL=2Ω 0.15 %
Input Resistance(Pin 1) RI open loop, f=1kHz 70 150 kΩ
Input Noise Current iN 60 200 pA
Input Noise Voltage eN 1 5 μV
f=1kHz 80 dB
Open Loop Voltage Gain Gvo f=10kHz 60 dB
Closed Loop Voltage Gain Gvc f=1kHz, RL=4Ω 39.3 40 40.3 dB
POUT=6W, RL=4Ω 69
Efficiency, f=1kHz η POUT=10W, RL=2Ω 65
%
Supply Voltage Rejection SVR f=100Hz, VRUPPLE=0.5V
RG=10kΩ, RL=4Ω 30 36 dB
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TEST CIRCUIT
AC Test Circuit
100nF
DC Test Circuit
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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)
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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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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.
COMPONENT RECOMMENDED
VALUE
PURPOSE LARGE THAN
RECOMMENDED VALUE
SMALLER THAN
RECOMMENDED VALUE
R1 (Gv-1)*R2 gain setting. increase of drain current
R2 2.2Ω gain and SVR setting. Decrease of SVR
R3 1Ω Frequency stability
Danger of oscillation at high
frequencies with inductive
loads.
Rx ≈20R2 Upper frequency cutoff Poor high frequencies
attenuation Danger of oscillation
C1 2.2μF Input DC decoupling Noise at switch-on
switch-off
C2 470μF Ripple rejection Decrease of SVR
C3 0.1μF Supply voltage bypass Danger of oscillation
C4 1000μF Supply voltage bypass Higher low frequency
cutoff
C5 0.1μF Frequency stability
Danger of oscillation at
high frequencies with
inductive loads.
Cx ≈1/(2π*B*R1) Upper frequency cutoff Lower bandwidth Larger bandwidth
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TYPICAL CHARACTORISTICS
810 1214 16
Vs(V)
0
4
2
6
8
Quiescent output voltage vs.Supply
voltage
810 12 14 16
Vs(V)
0
20
40
60
80
Quiescent drain current vs.Supply
voltage
05 1015 20
Vs(V)
0
5
10
15
20
Output power vs.Supply voltage
Gv=40dB
f=1kHz
THD=10%
R=4Ω
R=3.2Ω
R=2Ω
R=1.6Ω
Output power vs.load resistance
02 4 6 8
RL(Ω)
0
4
8
12
16 Vs=16V
Vs=14.4V
Vs=12V
Vs=8V
Gv=40dB
f=1kHz
THD=10%
Gain vs. Input sensitivity Gain vs. Input sensitivity
10 100 1000
20
24
28
32
36
40
44
48
52
54
58 VS=14.4V
f=1kHz
RL=4Ω
VS=14.4V
f=1kHz
RL=2Ω
10
20
24
28
32
36
40
44
48
52
54
58
100 1000
VI (RMS) VI (RMS)
POUT=6W
POUT=0.5W
POUT=10W
POUT=0.5W
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TYPICAL CHARACTORISTICS (Cont.)
THD (%)
SVR (dB)
THD (%)
PD (W)
(%)
SVR (dB)
PD (W)
η(%)
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TYPICAL CHARACTORISTICS (Cont.)
Maximum Power dissipation and
supply voltage(sine wave operation)
0 5 10 15 20
10
15
20
5
0
RL=1.6
RL=2
RL=3.2
RL=4
Vs(V)
PD(W)
10
15
20
5
0
050100150200
Ta (℃)
Maximum allowable dissipation
and ambient temperature
infinite heatsink
10℃/W
30℃/W
Typical values of capacitor(Cx) for
different values of frequency response
36 40 44 48
1
10
100
B=15kHz
B=10kHz
B=20kHz
R2=2.2
Gv (dB)
Cx (nF)
PD(W)
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 be accurate
and reliable and may be changed without notice.
