tda7053a, Ham- CB Radio, Karty katalogowe
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INTEGRATED CIRCUITS
DATA SHEET
TDA7053A
Stereo BTL audio output amplifier
with DC volume control
Product specification
Supersedes data of 1995 Nov 09
File under Integrated Circuits, IC01
1997 Jul 15
Philips Semiconductors
Product specification
Stereo BTL audio output amplifier with DC
volume control
TDA7053A
FEATURES
GENERAL DESCRIPTION
·
DC volume control
The TDA7053A (2
´
1 W) and TDA7053AT (2
´
0.5 W) are
stereo BTL output amplifiers with DC volume control.
The devices are designed for use in TV and monitors, but
are also suitable for battery-fed portable recorders and
radios.
·
Few external components
·
Mute mode
·
Thermal protection
·
Short-circuit proof
Missing Current Limiter (MCL)
·
No switch-on and switch-off clicks
·
Good overall stability
A MCL protection circuit is built-in. The MCL circuit is
activated when the difference in current between the
output terminal of each amplifier exceeds 100 mA
(typical 300 mA). This level of 100 mA allows for
headphone applications (single-ended).
·
Low power consumption
·
Low HF radiation
·
ESD protected on all pins.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
supply voltage
4.5
-
18
V
P
out
output power
V
P
=6V
TDA7053A
R
L
=8
W
0.85
1.0
-
W
TDA7053AT
R
L
=16
W
0.5
0.55
-
W
G
v
voltage gain
39.5
40.5
41.5
dB
G
C
gain control
68.0
73.5
-
dB
I
q(tot)
total quiescent current
V
P
=6V; R
L
=
¥
-
22
25
mA
THD
total harmonic distortion
TDA7053A
P
out
= 0.5 W
-
0.3
1
%
TDA7053AT
P
out
= 0.25 W
-
0.3
1
%
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA7053A
DIP16
plastic dual in-line package; 16 leads (300 mil); long body
SOT38-1
TDA7053AT
SO16
plastic small outline package; 16 leads; body width 7.5 mm
SOT162-1
1997 Jul 15
2
Philips Semiconductors
Product specification
Stereo BTL audio output amplifier with DC
volume control
TDA7053A
BLOCK DIAGRAM
V
P
TDA7053A
TDA7053AT
5
I i
16
positive
output 1
4
input 1
DC volume
control 1
2
I
I i
13
negative
output 1
V
ref
STABILIZER
TEMPERATURE
PROTECTION
input 2
6
I i
12
negative
output 2
DC volume
control 2
8
II
I i
9
positive
output 2
1,3,11,15
7
14
10
MSA717 - 2
not
connected
signal
ground
power
ground 1
power
ground 2
Fig.1 Block diagram.
1997 Jul 15
3
Philips Semiconductors
Product specification
Stereo BTL audio output amplifier with DC
volume control
TDA7053A
PINNING
SYMBOL
PIN
DESCRIPTION
n.c.
1
not connected
VC1
2
DC volume control 1
n.c.
3
not connected
n.c.
1
16
OUT1
V
I (1)
4
voltage input 1
VC1
2
15
n.c.
V
P
5
positive supply voltage
n.c.
3
14
PGND1
V
I (2)
6
voltage input 2
SGND
7
signal ground
V
I (1)
4
TDA7053A
TDA7053AT
13
OUT1
VC2
8
DC volume control 2
V
P
5
12
OUT2
OUT2+
9
positive output 2
V
I (2)
6
11
n.c.
PGND2
10
power ground 2
SGND
7
10
PGND2
n.c.
11
not connected
VC2
8
9
OUT2
OUT2
-
12
negative output 2
MSA719 - 2
OUT1
-
13
negative output 1
PGND1
14
power ground 1
n.c.
15
not connected
Fig.2 Pin configuration.
OUT1+
16
positive output 1
FUNCTIONAL DESCRIPTION
For portable applications there is a trend to decrease the
supply voltage, resulting in a reduction of output power at
conventional output stages. Using the BTL principle
increases the output power.
The TDA7053A and TDA7053AT are stereo output
amplifiers with two DC volume control stages, designed for
TV and monitors, but also suitable for battery-fed portable
recorders and radios.
The maximum gain of the amplifier is fixed at 40.5 dB.
The DC volume control stages have a logarithmic control
characteristic. Therefore, the total gain can be controlled
from +40.5 to
In conventional DC volume control circuits the control or
input stage is AC coupled to the output stage via external
capacitors to keep the offset voltage low.
The two DC volume control stages are integrated into the
input stages so that no coupling capacitors are required
and a low offset voltage is still maintained. The minimum
supply voltage also remains low.
The BTL principle offers the following advantages:
·
-
33 dB.
Lower peak value of the supply current
If the DC volume control voltage falls below 0.4 V, the
device will switch to the mute mode.
The amplifier is short-circuit protected to ground, V
P
and
across the load. A thermal protection circuit is also
implemented. If the crystal temperature rises above
150
°
C the gain will be reduced, thereby reducing the
output power.
Special attention is given to switch-on and switch-off
clicks, low HF radiation and a good overall stability.
·
The frequency of the ripple on the supply voltage is twice
the signal frequency.
Consequently, a reduced power supply with smaller
capacitors can be used which results in cost reductions.
1997 Jul 15
4
Philips Semiconductors
Product specification
Stereo BTL audio output amplifier with DC
volume control
TDA7053A
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
P
supply voltage
-
18
V
I
ORM
repetitive peak output current
-
1.25
A
I
OSM
non-repetitive peak output current
-
1.5
A
P
tot
total power dissipation
T
amb
£
25
°
C
TDA7053A
-
2.5
W
TDA7053AT
-
1.32
W
t
sc
short-circuit time
-
1
hr
V
n
input voltage pins 2, 4, 6 and 8
-
5
V
T
amb
operating ambient temperature
-
40
+85
°
C
T
stg
storage temperature
-
55
+150
°
C
T
vj
virtual junction temperature
-
+150
°
C
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
VALUE
UNIT
R
th j-a
thermal resistance from junction to ambient in free air
TDA7053A
50
K/W
TDA7053AT
95
K/W
Power dissipation
TDA7053A:
Assume V
P
= 6 V and R
L
=8
W
.
The maximum sine wave dissipation is 2
´
0.9 W = 1.8 W.
The R
th j-a
of the package is 50 K/W therefore T
amb(max)
= 150
-
(50
´
1.8) = 60
°
C.
TDA7053AT:
Assume V
P
= 6 V and R
L
=16
W
.
The maximum sine wave dissipation is 2
´
0.46 W = 0.92 W.
The R
th j-a
of the package is 95 K/W therefore T
amb(max)
= 150
-
(95
´
0.92) = 62.6
°
C.
1997 Jul 15
5
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