TDA2040
20W Hi-Fi AUDIO POWER AMPLIFIER
December 1995
PENTAWATT
ORDERING NUMBER : TDA2040V
DESCRIPTION
The TDA2040 is a monolithic integrated circuit in
Pentawatt
package,intended for use as an audio
class AB amplifier. Typically it provides 22W output
power (d = 0.5%) at V
s
= 32V/4
. The TDA2040
provides high output current and has very low
harmonic and cross-over distortion. Further the
device incorporates a patented short circuit protec-
tion system comprising an arrangement for auto-
matically limiting the dissipated power so as to keep
the working point of the output transistors within
their safe operating area. A thermal shut-down
system is also included.
TEST CIRCUIT
1/13
SCHEMATIC DIAGRAM
PIN CONNECTION
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th j-case
Thermal Resistance Junction-case
Max.
3
C/W
TDA2040
2/13
ELECTRICAL CHARACTERISTICS
(refer to the test circuit, V
S
=
16V, T
amb
= 25
o
C unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
s
Supply Voltage
2.5
20
V
I
d
Quiescent Drain Current
V
s
=
4.5V
V
s
=
20V
45
30
100
mA
mA
I
b
Input Bias Current
V
s
=
20V
0.3
1
A
V
os
Input Offset Voltage
V
s
=
20V
2
20
mV
I
os
Input Offset Current
200
nA
P
o
Output Power
d = 0.5%, T
case
= 60
C
f = 1kHz
R
L
= 4
R
L
= 8
f = 15kHz
R
L
= 4
20
15
22
12
18
W
BW
Power Bandwidth
P
o
= 1W, R
L
= 4
100
kHz
G
v
Open Loop Voltage Gain
f = 1kHz
80
dB
G
v
Closed Loop Voltage Gain
f = 1kHz
29.5
30
30.5
dB
d
Total Harmonic Distortion
P
o
= 0.1 to 10W, R
L
= 4
f = 40 to 15000Hz
f = 1kHz
0.08
0.03
%
e
N
Input Noise Voltage
B = Curve A
B = 22Hz to 22kHz
2
3
10
V
V
i
N
Input Noise Current
B = Curve A
B = 22Hz to 22kHz
50
80
200
pA
R
i
Input Resistance (pin 1)
0.5
5
M
SVR
Supply Voltage Rejection
R
L
= 4
, R
g
= 22k
, G
v
= 30dB
f = 100Hz, V
ripple
= 0.5V
RMS
40
50
dB
Efficiency
f = 1kHz
P
o
= 12W
R
L
= 8
P
o
= 22W
R
L
= 4
66
63
%
T
j
Thermal Shut-down Junction Temperature
145
C
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
s
Supply Voltage
20
V
V
i
Input Voltage
V
s
V
i
Differential Input Voltage
15
V
I
o
Output Peak Current (internally limited)
4
A
P
tot
Power Dissipation at T
case
= 75
C
25
W
T
stg
, T
j
Storage and Junction Temperature
40 to + 150
C
TDA2040
3/13
Figure 1 :
Output Power versus Supply Voltage
Figure 2 :
Output Power versus Supply Voltage
Figure 3 :
Output Power versus Supply Voltage
Figure 4 :
Distortion versus Frequency
Figure 5 :
Supply Voltage Rejection versus
Frequency
Figure 6 :
Supply Voltage Rejection versus
Voltage Gain
TDA2040
4/13
Figure 7 :
Quiescent Drain Current versus
Supply Voltage
Figure 8 :
Open Loop Gain versus Frequency
Figure 9 :
Power Dissipation versus Output
Power
TDA2040
5/13
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