Philips Stereo Amplifier TDA7056A User Manual

INTEGRATED CIRCUITS  
DATA SHEET  
TDA7056A  
3 W BTL mono audio output  
amplifier with DC volume control  
July 1994  
Product specificiation  
File under Integrated Circuits, IC01  
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Philips Semiconductors  
Product specificiation  
3 W BTL mono audio output amplifier with  
DC volume control  
TDA7056A  
V
P
2
1
n.c.  
TDA7056A  
9
n.c.  
I + i  
6
positive output  
3
5
positive input  
DC volume control  
I
– i  
8
negative output  
STABILIZER TEMPERATURE  
PROTECTION  
V
ref  
4
7
MGA072 - 1  
signal  
ground  
power  
ground  
Fig.1 Block diagram.  
PINNING  
SYMBOL  
PIN  
DESCRIPTION  
n.c.  
1
2
3
4
5
6
7
8
9
not connected  
handbook, halfpage  
VP  
positive supply voltage  
voltage input  
n.c.  
1
VI  
V
2
3
4
5
6
7
8
9
P
GND1  
VC  
signal ground  
V
I
DC volume control  
positive output  
power ground  
GND1  
VC  
OUT+  
GND2  
OUT−  
n.c.  
TDA7056A  
OUT+  
GND2  
OUT−  
n.c.  
negative output  
not connected  
MGA071  
Fig.2 Pin configuration.  
July 1994  
3
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Philips Semiconductors  
Product specificiation  
3 W BTL mono audio output amplifier with  
DC volume control  
TDA7056A  
Thus, a reduced power supply and smaller capacitors can  
be used which results in cost savings.  
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.  
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.  
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.  
The maximum gain of the amplifier is fixed at 35.5 dB. The  
DC volume control stage has a logarithmic control  
characteristic.  
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.  
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.  
At the same time the minimum supply voltage remains low.  
The BTL principle offers the following advantages:  
The amplifier is short-circuit proof to ground, VP 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.  
lower peak value of the supply current  
the frequency of the ripple on the supply voltage is twice  
the signal frequency  
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).  
SYMBOL  
PARAMETER  
supply voltage range  
CONDITIONS  
MIN.  
MAX.  
18  
UNIT  
VP  
V
IORM  
IOSM  
Ptot  
Tamb  
Tstg  
Tvj  
repetitive peak output current  
non repetitive peak output current  
total power dissipation  
1.25  
1.5  
9
A
A
Tcase < 60 °C  
W
°C  
°C  
°C  
hr  
V
operating ambient temperature range  
storage temperature range  
virtual junction temperature  
short-circuit time  
40  
55  
+85  
+150  
+150  
1
Tsc  
V3  
input voltage pin 3  
8
V5  
input voltage pin 5  
8
V
THERMAL RESISTANCE  
SYMBOL  
PARAMETER  
THERMAL RESISTANCE  
55 K/W  
Rth j-a  
Rth j-c  
from junction to ambient in free air  
from junction to case  
10 K/W  
Note to the thermal resistance  
VP = 12 V; RL = 16 ; The maximum sine-wave dissipation is = 1.8 W. The Rth vj-a of the package is 55 K/W;  
Tamb (max) = 150 55 x 1.8 = 51 °C  
July 1994  
4
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Philips Semiconductors  
Product specificiation  
3 W BTL mono audio output amplifier with  
DC volume control  
TDA7056A  
CHARACTERISTICS  
VP = 12 V; f = 1 kHz; RL = 16 ; Tamb = 25 °C; unless otherwise specified (see Fig.6)  
SYMBOL  
VP  
IP  
PARAMETER  
CONDITIONS  
MIN.  
4.5  
TYP.  
MAX. UNIT  
positive supply voltage range  
total quiescent current  
8
18  
16  
V
VP = 12 V; RL = ; note 1  
mA  
Maximum gain (V5 = 1.4 V)  
PO  
output power  
THD = 10%; RL = 16 Ω  
THD = 10%; RL = 8 Ω  
PO = 0.5 W  
3
3.5  
W
W
%
34.5  
0.5  
5.2  
THD  
Gv  
total harmonic distortion  
voltage gain  
0.3  
1
35.5  
0.65  
210  
36.5  
dB  
V
VI  
input signal handling  
noise output voltage (RMS value)  
bandwidth  
V5 = 0.8 V;THD < 1%  
f = 500 kHz; note 2  
at 1 dB  
Vno(rms)  
B
µV  
20 Hz to  
300 kHz  
SVRR  
|Voff|  
ZI  
supply voltage ripple rejection  
DC output offset voltage  
input impedance pin 3  
note 3  
38  
46  
0
150  
25  
dB  
mV  
kΩ  
15  
20  
Minimum gain (V5 = 0.5 V)  
Gv  
voltage gain  
44  
20  
30  
dB  
Vno(rms)  
noise output voltage (RMS value)  
note 4  
µV  
Mute position  
VO  
output voltage in mute position  
V5 0.3 V; VI = 600 mV  
30  
µV  
DC volume control  
φ
I5  
gain control range  
control current  
75  
60  
80  
70  
80  
dB  
V5 = 0 V  
µA  
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 RL.  
2. The noise output voltage (RMS value) at f = 500 kHz is measured with RS = 0 and bandwidth = 5 kHz.  
3. The ripple rejection is measured with RS = 0 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 kunweighted.  
July 1994  
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Philips Semiconductors  
Product specificiation  
3 W BTL mono audio output amplifier with  
DC volume control  
TDA7056A  
MGA075  
MGA076 - 1  
1000  
40  
handbook, halfpage  
gain  
handbook, halfpage  
V
noise  
(dB)  
20  
(µV)  
800  
0
– 20  
– 40  
– 60  
600  
400  
200  
0
0
– 80  
0
0.4  
0.8  
1.2  
1.6  
2.0  
0.4  
0.8  
1.2  
1.6  
2.0  
(V)  
V
V
(V)  
5
5
Fig.4 Noise output voltage as a function of DC  
volume control.  
Fig.3 Gain as a function of DC volume control.  
MGA077 - 1  
100  
handbook, halfpage  
I
5
(µA)  
60  
20  
– 20  
– 60  
– 100  
0
0.4  
0.8  
1.2  
1.6  
2.0  
(V)  
V
5
Fig.5 Control current as a function of DC volume  
control.  
July 1994  
6
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Philips Semiconductors  
Product specificiation  
3 W BTL mono audio output amplifier with  
DC volume control  
TDA7056A  
APPLICATION INFORMATION  
(1)  
V
P
100  
nF  
220 µF  
2
1
n.c.  
9
TDA7056A  
n.c.  
I + i  
6
0.47 µF  
positive  
input  
3
5
R
= 16 Ω  
L
I – i  
8
5
kΩ  
R
S
STABILIZER  
TEMPERATURE  
PROTECTION  
V
ref  
DC  
volume  
control  
4
7
MGA073 - 1  
ground  
(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.  
July 1994  
7
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Philips Semiconductors  
Product specificiation  
3 W BTL mono audio output amplifier with  
DC volume control  
TDA7056A  
PACKAGE OUTLINE  
SIL9MPF: plastic single in-line medium power package with fin; 9 leads  
SOT110-1  
D
D
1
q
A
2
P
P
1
A
3
q
2
q
1
A
A
4
E
pin 1 index  
c
L
1
9
b
Q
e
Z
b
w
M
2
b
1
0
5
10 mm  
scale  
DIMENSIONS (mm are the original dimensions)  
(1)  
A
max.  
2
Z
(1)  
(1)  
E
UNIT  
A
A
b
b
b
c
D
D
e
L
P
P
Q
q
q
q
2
w
A
3
4
1
2
1
1
1
max.  
18.5  
17.8  
8.7 15.8 1.40 0.67 1.40 0.48 21.8 21.4 6.48  
8.0 15.4 1.14 0.50 1.14 0.38 21.4 20.7 6.20  
3.9 2.75 3.4 1.75 15.1  
3.4 2.50 3.2 1.55 14.9  
4.4  
4.2  
5.9  
5.7  
2.54  
mm  
3.7  
0.25 1.0  
Note  
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.  
REFERENCES  
OUTLINE  
EUROPEAN  
PROJECTION  
ISSUE DATE  
VERSION  
IEC  
JEDEC  
EIAJ  
92-11-17  
95-02-25  
SOT110-1  
July 1994  
8
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Philips Semiconductors  
Product specificiation  
3 W BTL mono audio output amplifier with  
DC volume control  
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 (Tstg 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.  
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.  
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.  
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.  
DEFINITIONS  
Data sheet status  
Objective specification  
Preliminary specification  
Product specification  
This data sheet contains target or goal specifications for product development.  
This data sheet contains preliminary data; supplementary data may be published later.  
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.  
July 1994  
9
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