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 Ω. 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 Ω; 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 Ω;
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 Ω and bandwidth = 5 kHz.
3. 20 Hz to 300 kHz (typical.
4. The ripple rejection is measured with RS = 0 Ω 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 kΩ unweighted.
.
.
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 Ω.
(2) RL = 8 Ω.
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 Ω.
(2) RL = 16 Ω.
(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.
1998 Apr 07
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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 Ω.
(2) RL = 16 Ω.
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.
1998 Apr 07
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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 Ω.
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 Ω,
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.
1998 Apr 07
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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 Ω.
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
15
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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,
Internet: http://www.semiconductors.philips.com
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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