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UTC TDA2003
LINEAR INTEGRATED CIRCUIT
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.
1
TO-220B
PIN CONFIGURATIONS
1 2 3 4 5 Non inverting input Inverting input Ground Output Supply Voltage
BLOCK DIAGRAM
5
4
3 12
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R107-002,A
UTC TDA2003
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
Vs Vs Vs Io Io Ptot Tstg Tj
ABSOLUTE MAXIMUM RATINGS(Ta=25C)
VALUE
40 28 18 3.5 4.5 20 -40~+150 -40~+150
UNIT
V V V A A W C C
Peak Supply Voltage DC Supply Voltage Operating Supply Voltage Output Peak Current (repetitive) Output Peak Current ( non repetitive) Power Dissipation at Tcase = 90C Storage Temperature Junction Temperature
ELECTRICAL CHARACTERISTICS(Refer to the test circuit,Vs=+-16V,Ta=25C)
PARAMETER SYMBOL DC CHARACTERISTICS
Supply Voltage Quiescent Output Voltage Quiescent Drain Current Vs Vo Id
TEST CONDITIONS
MIN
8 6.1
TYP
MAX
18 7.7 50
UNIT
V V mA
6.9 44
AC CHARACTERISTICS
d=10%,f=1kHz RL=8 RL=2 RL=3.2 RL=1.6 f=1kHz Po=0.5W,RL=4 Po=6W,RL=4 Po=0.5W,RL=2 Po=10W,RL=2 5.5 9 6 10 7.5 12 14 55 10 50 300 40 15000
Output Power
Po
W
Input Sensitivity
Vi
Input Saturation Voltage Frequency Response(-3dB) Distortion Input Resistance(Pin 1) Input Noise Current Input Noise Voltage Open Loop Voltage Gain Closed Loop Voltage Gain
Vi(rms) B Po=1W,RL=4 f=1kHz Po=0.05 to 4.5W ,RL=4 Po=0.05 to 7.5W ,RL=2 open loop,f=1kHz
mV mV mV mV mV Hz
D Ri eN IN Gvo Gvc
70
0.15 0.15 150 60 1 80 60 200 5
% k pA V dB dB dB
f=1kHz f=10kHz f=1kHz RL=4
39.3
40
40.3
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R107-002,A
UTC TDA2003
PARAMETER
Efficiency Supply Voltage Rejection
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS
f=1kHz Po=6W,RL=4 Po=10W,RL=2 f=100Hz,Vripple=0.5V Rg=10k,RL=4
SYMBOL
| C
MIN
TYP
69 65
MAX
UNIT
% % dB
SVR
30
36
TEST CIRCUIT
+Vs
100 F C3 100nF
Vi
C1 1 F
1 UTC TDA2003 2
5 4 3
C4 1000 F
Cx 39nF
R2 2.2
Rx=20*R2
Cx=1/(2 B*R1)
DC Test Circuit
+Vs
100nF
AC Test Circuit
+Vs
100 F C3 100nF
mA
Vi
1 UTC TDA2003 2
Vi 5 4 3
R1 220 RL 470 F 1000 F C1 1 F
1 UTC TDA2003 2
100nF
Rx 39
R1 220 R3 1
RL
C2 470 F
5 4 3
C4 1000F
Cx 39nF
Rx=20*R2
Cx=1/(2 B*R1)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
100nF
V
R2 2.2
Rx 39
R1 220 R3 1 R2 2.2
RL
C2 470 F
3
QW-R107-002,A
UTC TDA2003
Fig.1 Quiescent output voltage vs.Supply voltage
Vo(V)
8
LINEAR INTEGRATED CIRCUIT
Fig.2 Quiescent drain current vs.Supply voltage
Id(mA)
80
TYPICAL PERFORMANCE CHARACTERISTICS
Fig.3 Output power vs.Supply voltage
Po (W)
20 Gv=40dB f=1kHz d=10%
R=1.6 R=2
6
60
15
4
40
10
R=3.2 R=4
2
20
5
0 8 10 12 14 16
0
0 8 10 12 14 16
Vs(V)
Vs(V)
0
5
10
15
20
Vs(V)
Fig.4 output power vs.load resistance
Po (W)
16 Vs=16V Vs=14.4V Gv=40dB f=1kHz d=10% 58 54 52 48 44 40 8 Vs=12V 36 32 Vs=8V 4 28 24 0 0 2 4 6 8 20 10
Fig.5 Gain vs. Input sensitivity
58 54 Gv=40dB f=1kHz RL=4 52 48 44 40 36 32 28 24 20 10
Fig.6 Gain vs. Input sensitivity
Gv=40dB f=1kHz RL=2
12
RL()
100
Vi(rms)
1000
100
Vi(rms)
1000
Fig.7 Distortion vs. output power
100
Fig.8 Distortion vs. frequency
d(%)
0.8 Gv=40dB Vs=14.4V RL=2/4
Fig.9 Supply voltage rejection vs. voltage gain
SVR (dB)
-10
d(%)
10 Gv=40dB f=1kHz Vs=14.4V
R=3.2
R=2
fripple=100Hz Vs=14,4V RL=2.2 Rg=10k
R=4 1
R=1.6
0.6
-20
Po=2.5W 0.4 0.1 0.2 Po=50mW
-30
-40
0.01 0.1
0 1 10
Po()
100
1 10
2 10
3 10
4 10
-50 30 35 40 45 50 55
Frequency (Hz)
Gv(dB)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R107-002,A
UTC TDA2003
Fig. 10 Supply voltage rejection vs.frequency
SVR (dB)
0
LINEAR INTEGRATED CIRCUIT
Fig. 11 Power dissipation and efficiency vs. output power(Rl=4 )
Ptot (W)
8
Fig. 12 Power dissipation and efficiency vs. output power(Rl=2 )
(%) Ptot (W)
8
-20
Vs=14.4V Vripple=0.5V Gv=40dB f=1kHz Rg=10k
R2=22
|C (%) Vs=14.4V Gv=40dB f=1kHz
80
80
6
Vs=14.4V Gv=40dB f=1kHz
60
6
60
-40
4 Ptot
40
4
40
-60
R2=1
2
20
2
20
-80 10
2 10
10
3
frequency(Hz)
4 10
10
5
0 0 2 4 6 8
0
0 0 2 4 6 8
0
Po(W)
Po(W)
Fig. 13 Maximum Power dissipation and supply voltage(sine wave operation)
Ptot (W) 20 Ptot (W)
Fig. 14 Maximum allowable dissipation and ambient temperature
Cx (nF)
100
Fig. 15 Typical values of capacitor(Cx) for different values of frequency response
infinite heatsink 20
B=10kHz B=15kHz
15 RL=1.6 10 RL=2 RL=3.2 5 RL=4
15 10 10 10XC/W 5 30XC/W B=20kHz
R2=2.2
0 0 5 10 15 20 Vs(V)
0 0 50 100 150 200 Tamb(XC)
1 36 40 44 48
Gv(dB)
APPLICATION CIRCUIT
+Vs
100F C3 100nF
Vi
C1 1 F
1 UTC TDA2003 2
5 4 3
C4 1000 F
Cx 39nF
R2 2.2
Rx=20*R2
Cx=1/(2B*R1)
Fig 16 Typical Application Circuit
UTC
UNISONIC TECHNOLOGIES CO., LTD.
100nF
Rx 39
R1 220 R3 1
RL
C2 470 F
5
QW-R107-002,A
UTC TDA2003
2.2 F
LINEAR INTEGRATED CIRCUIT
Vs=14.4V
1 0.1F
1 2
5
UTC TDA2003
5 4
RL=4 0.1 F 200 430
1 2
2.2 F
4
UTC TDA2003
3
3
C3 15 F
16
C4 10 F
16
Fig.18
20W Bridge Configuration Application
The Values of the capacitors C3 and C4 are different to optimize the SVR(Typ. 40dB)
Vs=14.4V
0.1 F 0.1 F
1 2
5
UTC TDA2003
RL=4
5 4
UTC TDA2003
0.1 F
1 2
0.1 F
4
0.1 F
3
3
C3 15 F 1nF
620
Fig.20
Low Cost Bridge Configuration Application Circuit(Po=18W)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
6
QW-R107-002,A
UTC TDA2003
LINEAR INTEGRATED CIRCUIT
BUILT-IN PROTECTION SYSTEMS LOAD DUMP VOLTAGE SURGE
The UTC TDA2003 has a circuit which enables it to withstand a volt. CHARACT age pulse train, on pin 5, of the type shown in Fig. 23. 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 shown in Fig.22. A suggested LC network is shown in Fig.23.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.
Vs (V) 40
t1=50ms
A
2mH From Supply Voltage 3000 F 16V
B
To Pin 5
14.4 t t2=1000ms 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.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
7
QW-R107-002,A
UTC TDA2003
THERMAL SHUT-DOWN
LINEAR INTEGRATED CIRCUIT
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 there Ptot) and Id are reduced.
APPLICATION SUGGESTION
The recommended values of the components are those shown on application circuit of Fig.16. Different values can be used. The following table can help the designer.
COMPONENT
RECOMMENDED VALUE
(Gv-1)*R2 2.2 1
PURPOSE
LARGE THAN RECOMMENDED VALUE
Decrease of SVR Danger of oscillation at high frequencies with inductive loads. Poor high frequencies attenuation
LARGE THAN RECOMMENDED VALUE
increase of Gain
R1 R2 R3
gain setting. gain and SVR setting. Frequency stability
Rx C1 C2 C3 C4 C5
20R2 2.2F 470F 0.1F 100F 0.1F
Upper frequency cutoff Input DC decoupling Ripple rejection Supply voltage bypass Supply voltage bypass Frequency stability
Dange of oscillation Noise at switch-on switch-off Decrease of SVR Dange of oscillation Higher low frequency cutoff Danger of oscillation at high frequencies with inductive loads. Larger bandwidth
Cx
1/(2*B*R1)
Upper frequency cutoff
smaller bandwidth
UTC
UNISONIC TECHNOLOGIES CO., LTD.
8
QW-R107-002,A

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