TDA2008
12W AUDIO AMPLIFIER (V
s
= 22V, R
L
= 4
)
DESCRIPTION
The TDA2008 is a mololithic class B audio power
amplifier in Pentawatt
package designed for driv-
ing low impedence loads (down to 3.2
). The divice
provides a high output current capability(up to 3A),
very low harmonic and crossover distortion.
In addition, the device offers the following features:
very low number of external components;
assembly ease, due to Pentawatt
power
package with no electrical insulations re-
quirements;
space and cost saving;
high reliability;
flexibility in use;
thermal protection.
March 1993
TYPICAL APPLICATION CIRCUIT
Pentawatt
ORDERING NUMBER : TDA 2008V
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SCHEMATIC DIAGRAM
PIN CONNECTION (top view)
Symbol
Parameter
Value
Unit
V
s
DC supply voltage
28
V
I
o
Output peak current (repetitive)
3
A
I
o
Output peak current ( non repetitive)
4
A
P
tot
Power dissipation at T
case
= 90
C
20
W
T
stg
, T
j
Storage and junction temperature
- 40 to 150
C
ABSOLUTE MAXIMUM RATINGS
TDA2008
DC TEST CIRCUIT
AC TEST CIRCUIT
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TDA2008
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Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
V
s
Supply voltage
10
28
V
V
o
Quiescent output voltage
(pin 4)
10.5
V
I
d
Quiescent drain current
(pin 5)
65
115
mA
P
o
Output power
d = 10%
R
L
= 8
8
W
f = 1 KHz
R
L
= 4
10
12
W
V
i
(RMS)
Input saturation voltage
300
mV
V
i
Input sensitivity
f = 1 KHz
P
o
= 0.5W
P
o
= 8W
P
o
= 0.5W
P
o
= 12W
R
L
= 8
R
L
= 8
R
L
= 4
R
L
= 4
20
80
14
70
mV
mV
mV
mV
B
Frequency response
(-3 dB)
P
o
= 1W
R
L
= 4
40 to 15,000
Hz
d
Distortion
f = 1 KHz
P
o
= 0.05 to 4W
P
o
= 0.05 to 6W
R
L
= 8
R
L
= 4
0.12
0.12
1
1
%
%
R
i
Input resistance (pin 1)
f = 1 KHz
70
150
K
G
v
Voltage gain (open loop)
f = 1 KHz
R
L
= 8
80
dB
G
v
Voltage gain (closed loop)
39.5
40
40.5
dB
e
N
Input noise voltage
BW = 22Hz to 22 KHz
1
5
V
i
N
Input noise current
60
200
pA
SVR
Supply voltage rejection
V
ripple
= 0.5
R
g
= 10K
R
L
= 4
f = 100 Hz
30
36
dB
ELECTRICAL CHARACTERISTICS ( Refer to the test circuit, V
s
= 18V, T
amb
= 25
C unless otherwise
specified)
Symbol
Parameter
Value
Unit
R
th-j-case
Thermal resistance junction-case
max
3
C/W
THERMAL DATA
TDA2008
Figure 1. Typical application circuit
Figure 2. P.C. board and component layout for
the circuit of fig. 1 (1:1 scale)
Figure 3. 25W bridge configuration applica- tion
circuit (
)
Figure 4. P.C. board and component layout for the
circuit of fig. 3 (1:1 scale)
APPLICATION INFORMATION
(
) The value of the capacitorr C3 and C4 are different to optimize
the SVR (Typ. = 40 dB)
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TDA2008
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