Page 1
DATA SH EET
Product specificiation
File under Integrated Circuits, IC01
July 1994
INTEGRATED CIRCUITS
TDA7056A
3 W BTL mono audio output
amplifier with DC volume control
Page 2
July 1994 2
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier
with DC volume control
TDA7056A
FEATURES
• DC volume control
• Few external components
• Mute mode
• Thermal protection
• Short-circuit proof
• No switch-on and off clicks
• Good overall stability
• Low power consumption
• Low HF radiation
• ESD protected on all pins.
GENERAL DESCRIPTION
The TDA7056A is a mono BTL output amplifier with DC
volume control. It is designed for use in TV and monitors,
but also suitable for battery-fed portable recorders and
radios.
Missing Current Limiter (MCL)
A MCL protection circuits 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).
QUICK REFERENCE DATA
ORDERING INFORMATION
Note
1. SOT110-1; 1996 August 21.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
positive supply voltage range 4.5 − 18 V
P
O
output power RL = 16 Ω; VP = 12 V 3 3.5 − W
G
v
voltage gain 34.5 35.5 36.5 dB
φ gain control range 75 80 − dB
I
P
total quiescent current VP = 12 V; RL = ∞−816mA
THD total harmonic distortion V
P
= 0.5 W − 0.3 1 %
EXTENDED TYPE
NUMBER
PACKAGE
PINS PIN POSITION MATERIAL CODE
TDA7056A 9 SIL plastic SOT110
Page 3
July 1994 3
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with
DC volume control
TDA7056A
Fig.1 Block diagram.
handbook, full pagewidth
positive input
7
MGA072 - 1
2
3
TDA7056A
V
P
5
6I + i
8
I – i
TEMPERATURE
PROTECTION
4
signal
ground
DC volume control
1
n.c.
positive output
negative output
power
ground
V
ref
STABILIZER
9
n.c.
PINNING
SYMBOL PIN DESCRIPTION
n.c. 1 not connected
V
P
2 positive supply voltage
V
I
3 voltage input
GND1 4 signal ground
VC 5 DC volume control
OUT+ 6 positive output
GND2 7 power ground
OUT− 8 negative output
n.c. 9 not connected
Fig.2 Pin configuration.
handbook, halfpage
MGA071
1
2
3
4
5
6
7
8
9
I
V
TDA7056A
n.c.
V
P
OUT−
GND2
OUT+
GND1
VC
n.c.
Page 4
July 1994 4
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with
DC volume control
TDA7056A
FUNCTIONAL DESCRIPTION
The TDA7056A is a mono BTL output amplifier with DC
volume control, designed for use in TV and monitor but
also suitable for battery-fed portable recorders and radios.
In conventional DC volume circuits the control or input
stage is AC coupled to the output stage via external
capacitor to keep the offset voltage low.
In the TDA7056A the DC volume stage is integrated into
the input stage so that coupling capacitors are not required
and a low offset voltage is maintained.
At the same time the minimum supply voltage 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
Thus, a reduced power supply and smaller capacitors can
be used which results in cost savings.
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 35.5 dB. The
DC volume control stage has a logarithmic control
characteristic.
The total gain can be controlled from 35.5 dB to −44 dB.
If the DC volume control voltage is below 0.3 V, the device
switches to the mute mode.
The amplifier is short-circuit proof 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 off clicks, low
HF radiation and a good overall stability.
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134).
THERMAL RESISTANCE
Note to the thermal resistance
V
P
= 12 V; RL = 16 Ω; The maximum sine-wave dissipation is = 1.8 W. The R
th vj-a
of the package is 55 K/W;
T
amb (max)
= 150 − 55 x 1.8 = 51 °C
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
P
supply voltage range − 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
case
< 60 °C − 9W
T
amb
operating ambient temperature range −40 +85 °C
T
stg
storage temperature range −55 +150 °C
T
vj
virtual junction temperature − +150 °C
T
sc
short-circuit time − 1hr
V
3
input voltage pin 3 − 8V
V
5
input voltage pin 5 − 8V
SYMBOL PARAMETER THERMAL RESISTANCE
R
th j-a
from junction to ambient in free air 55 K/W
R
th j-c
from junction to case 10 K/W
Page 5
July 1994 5
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with
DC volume control
TDA7056A
CHARACTERISTICS
V
P
= 12 V; f = 1 kHz; RL = 16 Ω; T
amb
= 25 °C; unless otherwise specified (see Fig.6)
Notes to the characteristics
1. With a load connected to the outputs the quiescent current will increase, the maximum value of this increase being
equal to the DC output offset voltage divided by R
L
.
2. The noise output voltage (RMS value) at f = 500 kHz is measured with RS = 0 Ω and bandwidth = 5 kHz.
3. The ripple rejection is measured with RS = 0 Ω and f = 100 Hz to 10 kHz. The ripple voltage of 200 mV (RMS value)
is applied to the positive supply rail.
4. The noise output voltage (RMS value) is measured with RS = 5 kΩ unweighted.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
positive supply voltage range 4.5 − 18 V
I
P
total quiescent current VP = 12 V; RL = ∞; note 1 − 816mA
Maximum gain (V
5
= 1.4 V)
P
O
output power
THD = 10%; R
L
= 16 Ω 3 3.5 − W
THD = 10%; R
L
= 8 Ω− 5.2 − W
THD total harmonic distortion P
O
= 0.5 W − 0.3 1 %
G
v
voltage gain 34.5 35.5 36.5 dB
V
I
input signal handling V5 = 0.8 V;THD < 1% 0.5 0.65 − V
V
no(rms)
noise output voltage (RMS value) f = 500 kHz; note 2 − 210 −µV
B bandwidth at −1 dB − 20 Hz to
300 kHz
−
SVRR supply voltage ripple rejection note 3 38 46 − dB
|V
off
| DC output offset voltage − 0 150 mV
Z
I
input impedance pin 3 15 20 25 kΩ
Minimum gain (V
5
= 0.5 V)
G
v
voltage gain −−44 − dB
V
no(rms)
noise output voltage (RMS value) note 4 − 20 30 µV
Mute position
V
O
output voltage in mute position V5≤ 0.3 V; VI = 600 mV −− 30 µV
DC volume control
φ gain control range 75 80 − dB
I
5
control current V5 = 0 V 60 70 80 µA
Page 6
July 1994 6
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with
DC volume control
TDA7056A
Fig.3 Gain as a function of DC volume control.
handbook, halfpage
MGA075
40
– 80
20
– 20
– 40
0
0 1.2 2.00.4 1.60.8
V (V)
5
gain
(dB)
– 60
Fig.4 Noise output voltage as a function of DC
volume control.
handbook, halfpage
1000
0
800
400
200
600
0 1.2 2.0
MGA076 - 1
0.4 1.60.8
V (V)
5
V
noise
(µV)
Fig.5 Control current as a function of DC volume
control.
handbook, halfpage
0 1.2 2.0
100
– 20
MGA077 - 1
60
20
– 60
– 100
0.4 1.60.8
V (V)
5
I
5
(µA)
Page 7
July 1994 7
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with
DC volume control
TDA7056A
APPLICATION INFORMATION
Fig.6 Test and application diagram.
(1) This capacitor can be omitted if the 220 µF electrolytic capacitor is connected close to pin 2.
handbook, full pagewidth
positive
input
5
kΩ
0.47 µF
R
S
7
MGA073 - 1
100
nF
220 µF
2
3
TDA7056A
R = 16 Ω
L
V
P
(1)
5
6
I + i
8I – i
V
ref
STABILIZER TEMPERATURE
PROTECTION
4
ground
DC
volume
control
1
n.c.
9
n.c.
Fig.7 Application using a potentiometer for
volume control; Gv = 30 dB.
handbook, halfpage
5
100 kΩ
volume
control
MGA074
Page 8
July 1994 8
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with
DC volume control
TDA7056A
PACKAGE OUTLINE
UNIT
A
A
max.
2
A
3
b
1
D
1
b
2
bcD
(1)
E
(1)
Z
max.
(1)
eLPP
1
q1q
2
q
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC JEDEC EIAJ
mm
18.5
17.8
3.7
8.7
8.0
A
4
15.8
15.4
1.40
1.14
0.67
0.50
1.40
1.14
0.48
0.38
21.8
21.4
21.4
20.7
6.48
6.20
3.4
3.2
2.54
1.0
5.9
5.7
4.4
4.2
3.9
3.4
15.1
14.9
Q
1.75
1.55
DIMENSIONS (mm are the original dimensions)
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
2.75
2.50
SOT110-1
92-11-17
95-02-25
0 5 10 mm
scale
0.25
w
D
E
A
A
c
A
2
3
A
4
q
1
q
2
L
Q
w M
b
b
1
b
2
D
1
P
q
1
Z
e
19
P
seating plane
pin 1 index
SIL9MPF: plastic single in-line medium power package with fin; 9 leads
SOT110-1
Page 9
July 1994 9
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with
DC volume control
TDA7056A
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our
“IC Package Databook”
(order code 9398 652 90011).
Soldering by dipping or by wave
The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
stg max
). If the
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
Repairing soldered joints
Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.
DEFINITIONS
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
Data sheet status
Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
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