DATA SHEET
Objective specification
File under Integrated Circuits, IC01
May 1992
INTEGRATED CIRCUITS
TDA7057Q
2 x 3 W stereo BTL audio output
amplifier
May 1992
2
Philips Semiconductors
Objective specification
2 x 3 W stereo BTL audio output
amplifier
TDA7057Q
FEATURES
No external components
No switch-on and off clicks
Good overall stability
Low power consumption
Short-circuit proof
Low HF radiation
ESD protected on all pins.
GENERAL DESCRIPTION
The TDA7057Q is a stereo output amplifier in a 13 pin
power package. The device is designed for battery-fed
portable stereo recorders and radios, but also suitable for
mains-fed applications.
QUICK REFERENCE DATA
ORDERING INFORMATION
Note
1. SOT141-6; 1996 September 9.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
positive supply voltage range
3.0
11
18
V
P
O
output power
V
P
= 11 V; R
L
= 16
-
3
-
W
G
V
voltage gain
39
40
41
dB
I
P
total quiescent current
V
P
= 11 V; R
L
=
-
10
14
mA
THD
total harmonic distortion
P
O
= 0.5 W
-
0.25
1
%
EXTENDED TYPE
PACKAGE
NUMBER
PIN
PIN POSITION
MATERIAL
CODE
TDA7057Q
13
SBD
plastic
SOT141
(1)
May 1992
5
Philips Semiconductors
Objective specification
2 x 3 W stereo BTL audio output amplifier
TDA7057Q
FUNCTIONAL DESCRIPTION
The TDA7057Q is a stereo output amplifier, designed for battery-fed applications e.g. portable radios, but also suitable
for mains fed applications. The gain is internally fixed at 40 dB.
For space reason there is a trend to decrease the number of battery cells. This means a decrease in supply voltage,
resulting in a reduction of output power at conventional output stages. The latter is not preferred. Using the BTL principle
increases the output power. The TDA7057Q can deliver an output power of 3 W in a speaker load of 16
with 11 V
supply.
The circuit is designed such that no external components are required. Special attention is given to switch-on and off
clicks, low HF radiation and a good overall stability. The load can be short-circuited at all input conditions.
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134).
Note to the limiting values
1. The load can be short-circuited at all input conditions.
THERMAL RESISTANCE
Note to the thermal resistance
V
P
= 11 V; R
L
= 16
; The maximum sine-wave dissipation is = 3 W; T
amb (max)
= 60
C; R
th vj-a
= (150
-
60)/3 = 30 K/W
R
th vj-a
= R
th vj-c
+
R
th c-HS
+
R
th HS
R
th c-HS
+
R
th HS
= 30
-
8 = 22 K/W
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
P
positive supply voltage range
-
18
V
I
ORM
repetitive peak output current
-
1
A
I
OSM
non repetitive peak output current
-
1.5
A
P
tot
total power dissipation
T
case
< 60
C
-
9
W
T
stg
storage temperature range
-
55
+150
C
T
vj
virtual junction temperature
-
+150
C
T
sc
short-circuit time
see note 1
-
1
hr
SYMBOL
PARAMETER
THERMAL RESISTANCE
R
th j-a
from junction to ambient in free air
45 K/W
R
th j-c
from junction to case
8 K/W
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