Philips Stereo Amplifier TDA7057AQ User Manual

INTEGRATED CIRCUITS  
DATA SHEET  
TDA7057AQ  
2 × 8 W stereo BTL audio output  
amplifier with DC volume control  
1998 Apr 07  
Product specification  
Supersedes data of 1997 July 15  
File under Integrated Circuits, IC01  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
BLOCK DIAGRAM  
V
P
4
TDA7057AQ  
I
I
i
i
13  
11  
positive  
output 1  
3
input 1  
1
DC volume  
control 1  
Ι
negative  
output 1  
TEMPERATURE  
PROTECTION  
STABILIZER  
V
ref  
I
I
i
10  
8
negative  
output 2  
5
7
input 2  
DC volume  
control 2  
ΙΙ  
i
positive  
output 2  
2
6
12  
9
MSA714  
not  
connected  
signal  
ground  
power  
ground 1  
power  
ground 2  
Fig.1 Block diagram.  
1998 Apr 07  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
PINNING  
SYMBOL  
PIN  
DESCRIPTION  
DC volume control 1  
handbook, halfpage  
VC1  
1
2
VC1  
n.c.  
1
2
n.c.  
not connected  
Vl (1)  
3
voltage input 1  
V
3
I (1)  
VP  
4
positive supply voltage  
voltage input 2  
V
P
4
Vl (2)  
5
V
I (2)  
5
SGND  
VC2  
6
signal ground  
6
SGND  
VC2  
7
DC volume control 2  
positive output 2  
power ground 2  
negative output 2  
negative output 1  
power ground 1  
positive output 1  
OUT2+  
PGND2  
OUT2−  
OUT1−  
PGND1  
OUT1+  
8
7
TDA7057AQ  
9
OUT2  
PGND2  
OUT2  
OUT1  
8
10  
11  
12  
13  
9
10  
11  
PGND1 12  
OUT1  
13  
MSA716  
Fig.2 Pin configuration.  
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.  
FUNCTIONAL DESCRIPTION  
The TDA7057AQ is a stereo output amplifier with two DC  
volume control stages. The device is designed for TVs and  
monitors, but is also suitable for battery-fed portable  
recorders and radios.  
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 dB to 33 dB. If the DC volume control voltage  
falls below 0.4 V, the device will switch to the mute mode.  
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.  
In the TDA7057AQ 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 amplifier is a short-circuit protected 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.  
The BTL principle offers the following advantages:  
Special attention is given to switch-on and switch-off  
clicks, low HF radiation and a good overall stability.  
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.  
1998 Apr 07  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
LIMITING VALUES  
In accordance with the Absolute Maximum Rating System (IEC 134).  
SYMBOL  
PARAMETER  
supply voltage  
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  
22.5  
+85  
+150  
150  
1
A
A
Tcase < 60 °C  
W
operating ambient temperature  
storage temperature  
40  
55  
°C  
°C  
°C  
hr  
virtual junction temperature  
short-circuit time  
tsc  
Vn  
input voltage pins 1, 3, 5 and 7  
5
V
THERMAL CHARACTERISTICS  
SYMBOL  
PARAMETER  
VALUE  
UNIT  
K/W  
K/W  
Rth j-c  
Rth j-a  
thermal resistance from junction to case  
thermal resistance from junction to ambient in free air  
4
40  
Power dissipation  
Assume VP = 12 V and RL = 16 . The maximum sine wave dissipation is 2 × 1.8 W = 3.6 W.  
At Tamb(max) = 60 °C:  
Rth tot = (150 60)/3.6 = 25 K/W.  
Rth tot = Rth j-c + Rth c-hs + Rth hs  
.
Rth c-hs + Rth hs = 25 4 = 21 K/W.  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
CHARACTERISTICS  
VP = 12 V;Tamb = 25 °C; fi = 1 kHz; RL = 16 ; unless otherwise specified (see Fig.13).  
SYMBOL  
VP  
Iq(tot)  
Maximum gain; V1,7 1.4 V  
PARAMETER  
voltage supply  
total quiescent current  
CONDITIONS  
MIN.  
4.5  
TYP.  
MAX.  
18.5  
UNIT  
V
VP = 12 V; RL = ; note 1  
22  
25  
mA  
Po  
output power  
THD = 10%; RL = 16 Ω  
THD = 10%; RL = 8 Ω  
THD=10%; RL = 8 ;  
VP = 15 V  
3.0  
3.5  
5.3  
8
W
W
W
THD  
Gv  
total harmonic distortion  
voltage gain  
Po = 0.5 W  
39.5  
1
0.3  
40.5  
210  
note 3  
38  
0
1
%
41.5  
200  
25  
dB  
V
Vi(rms)  
Vo(n)  
B
input signal handling (RMS value) Gv = 0 dB; THD < 1%  
noise output voltage  
bandwidth  
fi = 500 kHz; note 2  
at 1 dB  
µV  
dB  
dB  
mV  
kΩ  
dB  
dB  
dB  
SVRR  
VOS  
Zi  
supply voltage ripple rejection  
DC output offset voltage  
input impedance (pins 3 and 5)  
channel separation  
note 4  
34  
15  
40  
|V13 - V11| and |V10 - V8|  
20  
αcs  
Gv  
RS = 5 kΩ  
note 5  
channel unbalance  
1
G1 = 0 dB; note 6  
1
Mute position; V1 = V7 =0.4 V ±30 mV  
Vo(mute) output voltage in mute position  
DC volume control  
Vi = 1.0 V; note 7  
V1 = V7 = 0 V  
35  
45  
µV  
Gv  
gain control range  
volume control current  
68  
73.5  
30  
dB  
lDC  
20  
25  
µA  
Notes  
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 fi = 500 kHz is measured with RS = 0 and bandwidth = 5 kHz.  
3. 20 Hz to 300 kHz (typical.  
4. The ripple rejection is measured with RS = 0 and f = 100 Hz to 10 kHz. The ripple voltage (Vripple = 200 mV RMS)  
is applied to the positive supply rail.  
5. The channel unbalance is measured with VDC1 = VDC2  
6. The channel unbalance at G1 = 0 dB is measured with VDC1 = VDC2  
7. The noise output voltage (RMS value) is measured with RS = 5 kunweighted.  
.
.
1998 Apr 07  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
MBG675  
MBG672  
12  
40  
handbook, halfpage  
handbook, halfpage  
I
q
THD  
(%)  
(mA)  
30  
8
4
0
(1)  
(2)  
20  
10  
0
0
2  
1  
4
8
12  
16  
20  
10  
10  
1
10  
P
(W)  
out  
V
(V)  
P
(1) RL = 16 .  
(2) RL = 8 .  
Fig.3 Quiescent current as a function of supply  
voltage.  
Fig.4 THD as a function of output power.  
MBG676  
MBG674  
12  
10  
handbook, halfpage  
handbook, halfpage  
THD  
(%)  
8
P
o
(W)  
(1)  
(2)  
8
6
4
4
2
(1)  
(2)  
1  
0
0
0
10  
4
8
12  
16  
20  
2  
2
10  
1
10  
10  
V
(V)  
f (kHz)  
P
THD = 10%; f = 1 kHz.  
(1) RL = 8 .  
(2) RL = 16 .  
(1) Gv = 40 dB; Po = 0.5 W.  
(2) Gv = 30 dB; Po = 0.5 W.  
Fig.6 Output power as a function of supply  
voltage.  
Fig.5 THD as a function of frequency.  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
MBG667  
MBG677  
80  
15  
handbook, halfpage  
handbook, halfpage  
G
v
(1)  
(dB)  
40  
P
d
(W)  
10  
0
40  
80  
(2)  
5
120  
0
0
0
0.4  
0.8  
1.2  
1.6  
V
2.0  
(V)  
4
8
12  
16  
20  
V
(V)  
P
VC  
(1) RL = 8 .  
(2) RL = 16 .  
Fig.7 Total worst case power dissipation as a  
function of supply voltage.  
Fig.8 Voltage gain as a function of volume control  
voltage.  
MBG678  
MBG663  
1
0
handbook, halfpage  
handbook, halfpage  
SVRR  
(dB)  
V
no  
(mV)  
20  
(1)  
1  
10  
40  
60  
(2)  
2  
80  
10  
10  
2  
1  
2
0
0.4  
0.8  
1.2  
1.6  
V
2.0  
(V)  
10  
1
10  
10  
f (kHz)  
VC  
f = 22 Hz to 22 kHz.  
(1) VDC = 1.4 V; Vripple = 0.2 V.  
(2) VDC = 0.4 V; Vripple = 0.2 V.  
Fig.9 Noise voltage as a function of volume  
control voltage.  
Fig.10 SVRR as a function of frequency.  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
MBG665  
MBG666  
2.0  
30  
handbook, halfpage  
handbook, halfpage  
I
VC  
(µA)  
V
in  
(V)  
20  
1.6  
10  
0
1.2  
0.8  
10  
20  
0.4  
0
0
30  
4
8
12  
16  
20  
0
0.4  
0.8  
1.2  
1.6  
V
2.0  
(V)  
V
(V)  
P
VC  
THD = 1 %.  
Fig.12 Volume control current as a function of  
volume control voltage.  
Fig.11 Input signal handling.  
For single-end applications the output peak current must  
not exceed 100 mA. At higher output currents the  
short-circuit protection (MCL) will be active.  
APPLICATION INFORMATION  
The application diagram is illustrated in Fig.13.  
Thermal considerations:  
Test conditions  
At high junction temperatures (>125 °C) the voltage gain  
will decrease when it is higher than 0 dB. This results in a  
decrease of the output voltage and an increase of the  
distortion level. Thus for an optimal performance of the IC  
the heatsink has to be designed properly.  
T
V
amb = 25 °C unless otherwise specified; VP = 12 V;  
DC = 1.4 V; fi = 1 kHz; RL = 16 .  
The quiescent current has been measured without load  
impedance.  
The output power as a function of the supply voltage has  
been measured at THD = 10%. The maximum output  
power is limited by the maximum power dissipation and the  
maximum available output current.  
Calculation example for application: VP = 15 V; RL = 8 ,  
stereo sine wave; worst case sine wave power dissipation  
is 12 W.  
For Tamb(max) = 40 °C the thermal resistance from junction  
The maximum input signal voltage is measured at  
THD = 1% at the output with a voltage gain of 0 dB.  
(125 40)  
to ambient Rth j-a  
=
= 7.1 K/W  
----------------------------  
12  
To avoid instabilities and too high a distortion, the input  
ground and power ground must be separated as far as  
possible and connected as close as possible to the IC.  
The thermal resistance of the heatsink becomes:  
th h-a = Rth j-a (Rth j-c + Rth c-h);  
R
Rth h-a = 7.1 (4 + 0.1) = 3 K/W.  
The DC volume control can be applied in several ways.  
Two possible circuits are shown below the main  
application diagram. The circuits at the control pin will  
influence the switch-on and switch-off behaviour and the  
maximum voltage gain.  
It should be noted that for ‘music power’ the power  
dissipation will be approximately half of the sine wave  
dissipation. Thus a smaller heatsink can be used.  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
V
= 12 V  
P
(1)  
220 µF  
100 nF  
4
TDA7057AQ  
13  
+
470 nF  
I + i  
3
1
input 1  
(2)  
R
= 5 kΩ  
I i  
s
11  
TEMPERATURE  
MCL  
PROTECTION  
STABILIZER  
10  
8
470 nF  
I i  
5
7
input 2  
(2)  
I + i  
DC-  
volume  
+
R
= 5 kΩ  
s
6
9
12  
signal  
ground  
power  
ground  
V
= 12 V  
P
100 kΩ  
1, 7  
volume  
control  
volume  
control  
1, 7  
maximum voltage  
gain 34 dB  
maximum voltage  
gain 40 dB  
1 µF  
1 MΩ  
1 µF  
22 kΩ  
MBG679  
(1) This capacitor can be omitted if the 220 µF electrolytic capacitor is connected close to pin 5.  
(2) RL = 16 .  
Fig.13 Test and application diagram.  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
PACKAGE OUTLINE  
DBS13P: plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)  
SOT141-6  
non-concave  
x
D
h
D
E
h
view B: mounting base side  
d
A
2
B
j
E
A
L
3
L
Q
c
2
v
M
1
13  
e
e
m
w
M
1
Z
b
p
e
0
5
10 mm  
scale  
DIMENSIONS (mm are the original dimensions)  
(1)  
(1)  
(1)  
UNIT  
A
A
b
c
D
d
D
E
e
e
e
E
j
L
L
3
m
Q
v
w
x
Z
2
p
h
1
2
h
17.0 4.6 0.75 0.48 24.0 20.0  
15.5 4.2 0.60 0.38 23.6 19.6  
12.2  
11.8  
3.4 12.4 2.4  
3.1 11.0 1.6  
2.00  
1.45  
2.1  
1.8  
6
mm  
10  
3.4  
1.7 5.08  
0.8  
4.3  
0.25 0.03  
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  
95-03-11  
97-12-16  
SOT141-6  
1998 Apr 07  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
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.  
1998 Apr 07  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
NOTES  
1998 Apr 07  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
NOTES  
1998 Apr 07  
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Philips Semiconductors  
Product specification  
2 × 8 W stereo BTL audio output amplifier  
with DC volume control  
TDA7057AQ  
NOTES  
1998 Apr 07  
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Hungary: see Austria  
Sweden: Kottbygatan 7, Akalla, S-16485 STOCKHOLM,  
Tel. +46 8 5985 2000, Fax. +46 8 5985 2745  
India: Philips INDIA Ltd, Band Box Building, 2nd floor,  
254-D, Dr. Annie Besant Road, Worli, MUMBAI 400 025,  
Tel. +91 22 493 8541, Fax. +91 22 493 0966  
Switzerland: Allmendstrasse 140, CH-8027 ZÜRICH,  
Tel. +41 1 488 2741 Fax. +41 1 488 3263  
Indonesia: PT Philips Development Corporation, Semiconductors Division,  
Gedung Philips, Jl. Buncit Raya Kav.99-100, JAKARTA 12510,  
Tel. +62 21 794 0040 ext. 2501, Fax. +62 21 794 0080  
Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1,  
TAIPEI, Taiwan Tel. +886 2 2134 2865, Fax. +886 2 2134 2874  
Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd.,  
209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260,  
Tel. +66 2 745 4090, Fax. +66 2 398 0793  
Ireland: Newstead, Clonskeagh, DUBLIN 14,  
Tel. +353 1 7640 000, Fax. +353 1 7640 200  
Israel: RAPAC Electronics, 7 Kehilat Saloniki St, PO Box 18053,  
Turkey: Talatpasa Cad. No. 5, 80640 GÜLTEPE/ISTANBUL,  
TEL AVIV 61180, Tel. +972 3 645 0444, Fax. +972 3 649 1007  
Tel. +90 212 279 2770, Fax. +90 212 282 6707  
Italy: PHILIPS SEMICONDUCTORS, Piazza IV Novembre 3,  
Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7,  
20124 MILANO, Tel. +39 2 6752 2531, Fax. +39 2 6752 2557  
252042 KIEV, Tel. +380 44 264 2776, Fax. +380 44 268 0461  
Japan: Philips Bldg 13-37, Kohnan 2-chome, Minato-ku, TOKYO 108,  
United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes,  
Tel. +81 3 3740 5130, Fax. +81 3 3740 5077  
MIDDLESEX UB3 5BX, Tel. +44 181 730 5000, Fax. +44 181 754 8421  
Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL,  
United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,  
Tel. +82 2 709 1412, Fax. +82 2 709 1415  
Tel. +1 800 234 7381  
Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR,  
Uruguay: see South America  
Tel. +60 3 750 5214, Fax. +60 3 757 4880  
Vietnam: see Singapore  
Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905,  
Tel. +9-5 800 234 7381  
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,  
Tel. +381 11 625 344, Fax.+381 11 635 777  
For all other countries apply to: Philips Semiconductors,  
International Marketing & Sales Communications, Building BE-p, P.O. Box 218,  
5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825  
© Philips Electronics N.V. 1998  
SCA59  
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.  
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed  
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license  
under patent- or other industrial or intellectual property rights.  
Printed in The Netherlands  
545102/1200/04/pp16  
Date of release: 1998 Apr 07  
Document order number: 9397 750 03255  
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