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TDA7056A
User Manual
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Philips TDA7056A User Manual

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INTEGRATED CIRCUITS
DATA SH EET
TDA7056A
3 W BTL mono audio output amplifier with DC volume control
Product specificiation File under Integrated Circuits, IC01
July 1994
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier
TDA7056A
with DC volume control

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.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
P
O
G
v
φ gain control range 75 80 − dB I
P
THD total harmonic distortion V
positive supply voltage range 4.5 − 18 V output power RL = 16 Ω; VP = 12 V 3 3.5 − W voltage gain 34.5 35.5 36.5 dB
total quiescent current VP = 12 V; RL = ∞−816mA

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).
= 0.5 W − 0.3 1 %
P

ORDERING INFORMATION

EXTENDED TYPE
NUMBER
TDA7056A 9 SIL plastic SOT110
Note
1. SOT110-1; 1996 August 21.
PINS PIN POSITION MATERIAL CODE
PACKAGE
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with DC volume control
handbook, full pagewidth
n.c. n.c.
positive input
DC volume control
1
V
ref
TDA7056A
STABILIZER
TEMPERATURE
PROTECTION
9
3
5
TDA7056A
V
P
2
6I + i
positive output
I – i
8
negative output

PINNING

SYMBOL PIN DESCRIPTION
n.c. 1 not connected V
P
V
I
2 positive supply voltage
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.1 Block diagram.
handbook, halfpage
signal
ground
GND1
OUT+
GND2
OUT−
4
n.c.
V
V
VC
n.c.
P
I
7
power
ground
1 2 3 4
TDA7056A
5 6 7 8 9
MGA072 - 1
MGA071
Fig.2 Pin configuration.
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with DC volume control

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
TDA7056A
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
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.
and
P

LIMITING VALUES

In accordance with the Absolute Maximum System (IEC 134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
P
I
ORM
I
OSM
P
tot
T
amb
T
stg
T
vj
T
sc
V
3
V
5
supply voltage range − 18 V repetitive peak output current − 1.25 A non repetitive peak output current − 1.5 A total power dissipation T
< 60 °C − 9W
case
operating ambient temperature range −40 +85 °C storage temperature range −55 +150 °C virtual junction temperature − +150 °C short-circuit time − 1hr input voltage pin 3 − 8V input voltage pin 5 − 8V

THERMAL RESISTANCE

SYMBOL PARAMETER THERMAL RESISTANCE
R R
th j-a th j-c
from junction to ambient in free air 55 K/W from junction to case 10 K/W
Note to the thermal resistance
= 12 V; RL = 16 Ω; The maximum sine-wave dissipation is = 1.8 W. The R
V
P
T
amb (max)
= 150 − 55 x 1.8 = 51 °C
of the package is 55 K/W;
th vj-a
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with
TDA7056A
DC volume control

CHARACTERISTICS

= 12 V; f = 1 kHz; RL = 16 Ω; T
V
P
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
I
P
Maximum gain (V
P
O
positive supply voltage range 4.5 − 18 V total quiescent current VP = 12 V; RL = ∞; note 1 − 816mA
= 1.4 V)
5
output power
THD total harmonic distortion P G
v
V
I
V
no(rms)
voltage gain 34.5 35.5 36.5 dB input signal handling V5 = 0.8 V;THD < 1% 0.5 0.65 − V noise output voltage (RMS value) f = 500 kHz; note 2 − 210 −µV
B bandwidth at −1 dB − 20 Hz to
SVRR supply voltage ripple rejection note 3 38 46 − dB
|V
| DC output offset voltage − 0 150 mV
off
Z
I
Minimum gain (V
G
v
V
no(rms)
input impedance pin 3 15 20 25 kΩ
= 0.5 V)
5
voltage gain −−44 − dB 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
= 25 °C; unless otherwise specified (see Fig.6)
amb
THD = 10%; R THD = 10%; R
= 0.5 W − 0.3 1 %
O
= 16 Ω 3 3.5 − W
L
= 8 Ω− 5.2 − W
L
−
300 kHz
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.
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with DC volume control
40
handbook, halfpage
gain (dB)
20
0
– 20
– 40
– 60
– 80
0 1.2 2.00.4 1.60.8
MGA075
V (V)
5
1000
handbook, halfpage
V
noise (µV)
800
600
400
200
0
0 1.2 2.0
0.4 1.60.8
TDA7056A
MGA076 - 1
V (V)
5
Fig.3 Gain as a function of DC volume control.
100
handbook, halfpage
I
5
(µA)
60
20
– 20
– 60
– 100
0.4 1.60.8
0 1.2 2.0
MGA077 - 1
V (V)
5
Fig.4 Noise output voltage as a function of DC
volume control.
Fig.5 Control current as a function of DC volume
control.
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with DC volume control

APPLICATION INFORMATION

handbook, full pagewidth
1
n.c.
positive
input
9
n.c.
0.47 µF
5
R
S
kΩ
DC volume control
3
5
TDA7056A
STABILIZER TEMPERATURE
V
ref
PROTECTION
2
I + i
(1)
100
nF
4
TDA7056A
V
P
220 µF
6
R = 16 Ω
L
8I – i
7
(1) This capacitor can be omitted if the 220 µF electrolytic capacitor is connected close to pin 2.
Fig.6 Test and application diagram.
handbook, halfpage
5
100 kΩ
MGA074
volume
control
Fig.7 Application using a potentiometer for
volume control; Gv = 30 dB.
MGA073 - 1
ground
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with DC volume control

PACKAGE OUTLINE

SIL9MPF: plastic single in-line medium power package with fin; 9 leads
D
D
1
q
P
P
1
q
2
q
1
TDA7056A

SOT110-1

A
2
A
3
pin 1 index
seating plane
19
Z
b
DIMENSIONS (mm are the original dimensions)
A
A
18.5
17.8
max.
3.7
2
A
A
3
4
8.7
15.8
8.0
15.4
UNIT
mm
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
e
2
b
0.67
0.50
b
1
2
1.40
0.48
1.14
0.38
bcD
1.40
1.14
b
b
1
0 5 10 mm
scale
(1)
D
1
21.8
21.4
21.4
20.7
w M
(1)
E
eLPP
6.48
6.20
2.54
3.9
3.4
A
A
4
L
Q
q1q
q
Q
1
3.4
3.2
1.75
1.55
15.1
14.9
4.4
4.2
2.75
2.50
c
5.9
5.7
E
2
w
0.25
(1)
Z
max.
1.0
OUTLINE
VERSION
SOT110-1
IEC JEDEC EIAJ
REFERENCES
EUROPEAN
PROJECTION
ISSUE DATE
92-11-17 95-02-25
Philips Semiconductors Product specificiation
3 W BTL mono audio output amplifier with DC volume control
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
“IC Package Databook”
our
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.
(order code 9398 652 90011).
TDA7056A
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 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.
stg max
). If the

DEFINITIONS

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.
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.
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