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
FEATURES
•
DC volume control
•
Few external components
•
Mute mode
•
Thermal protection
•
Short-circuit proof
•
No switch-on and switch-off clicks
•
Good overall stability
•
Low power consumption
•
Low HF radiation
•
ESD protected on all pins.
QUICK REFERENCE DATA
SYMBOL
V
P
P
out
PARAMETER
supply voltage
output power
TDA7053A
TDA7053AT
G
v
G
C
I
q(tot)
THD
voltage gain
gain control
total quiescent current
total harmonic distortion
TDA7053A
TDA7053AT
ORDERING INFORMATION
TYPE
NUMBER
TDA7053A
TDA7053AT
PACKAGE
NAME
DIP16
SO16
DESCRIPTION
plastic dual in-line package; 16 leads (300 mil); long body
plastic small outline package; 16 leads; body width 7.5 mm
P
out
= 0.5 W
P
out
= 0.25 W
−
−
0.3
0.3
V
P
= 6 V; R
L
=
∞
V
P
= 6 V
R
L
= 8
Ω
R
L
= 16
Ω
0.85
0.5
39.5
68.0
−
1.0
0.55
40.5
73.5
22
CONDITIONS
MIN.
4.5
−
TYP.
Missing Current Limiter (MCL)
GENERAL DESCRIPTION
TDA7053A
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.
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).
MAX.
18
−
−
41.5
−
25
1
1
UNIT
V
W
W
dB
dB
mA
%
%
VERSION
SOT38-1
SOT162-1
1997 Jul 15
2
Philips Semiconductors
Product specification
Stereo BTL audio output amplifier with DC
volume control
BLOCK DIAGRAM
TDA7053A
V
P
5
I
i
16
positive
output 1
input 1
DC volume
control 1
4
2
TDA7053A
TDA7053AT
Ι
I
i
13
negative
output 1
Vref
STABILIZER
TEMPERATURE
PROTECTION
input 2
DC volume
control 2
6
8
I
i
12
negative
output 2
ΙΙ
I
i
9
positive
output 2
1,3,11,15
not
connected
7
14
10
MSA717 - 2
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
PINNING
SYMBOL
n.c.
VC1
n.c.
V
I (1)
V
P
V
I (2)
SGND
VC2
OUT2+
PGND2
n.c.
OUT2−
OUT1−
PGND1
n.c.
OUT1+
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DESCRIPTION
not connected
DC volume control 1
not connected
voltage input 1
positive supply voltage
voltage input 2
signal ground
DC volume control 2
positive output 2
power ground 2
not connected
negative output 2
MSA719 - 2
TDA7053A
n.c.
VC1
n.c.
V I (1)
VP
V I (2)
SGND
VC2
1
2
3
4
5
6
7
8
TDA7053A
TDA7053AT
16 OUT1
15 n.c.
14 PGND1
13
12
OUT1
OUT2
11 n.c.
10 PGND2
9
OUT2
negative output 1
power ground 1
not connected
positive output 1
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
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.
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:
•
Lower peak value of the supply current
•
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.
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 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
−33
dB.
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.
1997 Jul 15
4
Philips Semiconductors
Product specification
Stereo BTL audio output amplifier with DC
volume control
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
V
P
I
ORM
I
OSM
P
tot
PARAMETER
supply voltage
repetitive peak output current
non-repetitive peak output current
total power dissipation
TDA7053A
TDA7053AT
t
sc
V
n
T
amb
T
stg
T
vj
short-circuit time
input voltage pins 2, 4, 6 and 8
operating ambient temperature
storage temperature
virtual junction temperature
T
amb
≤
25
°C
−
−
−
−
−40
−55
−
CONDITIONS
−
−
−
MIN.
TDA7053A
MAX.
18
1.25
1.5
2.5
1.32
1
5
+85
+150
+150
V
A
A
W
W
hr
V
UNIT
°C
°C
°C
THERMAL CHARACTERISTICS
SYMBOL
R
th j-a
TDA7053A
TDA7053AT
Power dissipation
TDA7053A:
Assume V
P
= 6 V and R
L
= 8
Ω.
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
Ω.
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.
PARAMETER
thermal resistance from junction to ambient in free air
50
95
K/W
K/W
VALUE
UNIT
1997 Jul 15
5
