Philips | TDA7057AQ | User's Manual | Philips TDA7057AQ User's Manual

INTEGRATED CIRCUITS
DATA SHEET
TDA7057AQ
2 × 8 W stereo BTL audio output
amplifier with DC volume control
Product specification
Supersedes data of 1997 July 15
File under Integrated Circuits, IC01
1998 Apr 07
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
TDA7057AQ
FEATURES
GENERAL DESCRIPTION
• DC volume control
The TDA7057AQ is a stereo BTL output amplifier with DC
volume control. The device is designed for use in TVs and
monitors, but is also suitable for battery-fed portable
recorders and radios.
• Few external components
• Mute mode
• Thermal protection
• Short-circuit proof
Missing Current Limiter (MCL)
• No switch-on and switch-off clicks
A MCL protection circuit 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
single-ended headphone applications.
• Good overall stability
• Low power consumption
• Low HF radiation
• ESD protected on all pins.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
VP
supply voltage
Pout
output power
CONDITIONS
MIN.
TYP.
MAX.
UNIT
4.5
−
18
V
VP = 12 V; RL = 16 Ω
3.0
3.5
−
W
VP = 12 V; RL = 8 Ω
−
5.3
−
W
VP = 15 V; RL = 8 Ω
−
8
−
W
Gv
voltage gain
39.5
40.5
41.5
dB
∆Gv
voltage gain control
68
73.5
−
dB
Iq(tot)
total quiescent current
VP = 12 V; RL = ∞
−
22
25
mA
THD
total harmonic distortion
Po = 0.5 W
−
0.3
1
%
ORDERING INFORMATION
PACKAGE
TYPE
NUMBER
NAME
DESCRIPTION
VERSION
TDA7057AQ
DBS13P
plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)
SOT141-6
1998 Apr 07
2
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
TDA7057AQ
BLOCK DIAGRAM
V
handbook, full pagewidth
P
4
TDA7057AQ
input 1
DC volume
control 1
I
3
1
Vref
DC volume
control 2
13
positive
output 1
i
11
negative
output 1
10
negative
output 2
8
positive
output 2
Ι
I
input 2
i
STABILIZER
TEMPERATURE
PROTECTION
I
5
7
i
ΙΙ
I
2
not
connected
6
i
12
signal
ground
power
ground 1
Fig.1 Block diagram.
1998 Apr 07
3
9
power
ground 2
MSA714
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
TDA7057AQ
PINNING
SYMBOL
PIN
DESCRIPTION
VC1
1
DC volume control 1
n.c.
2
not connected
Vl (1)
3
voltage input 1
VP
4
positive supply voltage
Vl (2)
5
voltage input 2
SGND
6
signal ground
VC2
7
DC volume control 2
OUT2+
8
positive output 2
PGND2
9
power ground 2
OUT2−
10
negative output 2
OUT1−
11
negative output 1
PGND1
12
power ground 1
OUT1+
13
positive output 1
handbook, halfpage
VC1
1
n.c.
2
V I (1)
3
VP
4
V I (2)
5
SGND
6
VC2
7
OUT2
8
PGND2
9
OUT2
10
OUT1
11
PGND1
12
OUT1
13
TDA7057AQ
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
4
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
CONDITIONS
MIN.
MAX.
UNIT
VP
supply voltage
−
18
V
IORM
repetitive peak output current
−
1.25
A
IOSM
non-repetitive peak output current
−
1.5
A
Ptot
total power dissipation
−
22.5
W
Tamb
operating ambient temperature
Tcase < 60 °C
−40
+85
°C
Tstg
storage temperature
−55
+150
°C
Tvj
virtual junction temperature
−
150
°C
tsc
short-circuit time
−
1
hr
Vn
input voltage pins 1, 3, 5 and 7
−
5
V
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
VALUE
UNIT
Rth j-c
thermal resistance from junction to case
4
K/W
Rth j-a
thermal resistance from junction to ambient in free air
40
K/W
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.
1998 Apr 07
5
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
PARAMETER
VP
voltage supply
Iq(tot)
total quiescent current
CONDITIONS
MIN.
TYP.
MAX.
UNIT
4.5
−
18.5
V
VP = 12 V; RL = ∞; note 1
−
22
25
mA
Maximum gain; V1,7 ≥ 1.4 V
Po
output power
THD = 10%; RL = 16 Ω
3.0
3.5
−
W
THD = 10%; RL = 8 Ω
−
5.3
−
W
THD=10%; RL = 8 Ω;
VP = 15 V
−
8
−
W
−
0.3
1
%
39.5
40.5
41.5
dB
Gv = 0 dB; THD < 1%
1
−
−
V
noise output voltage
fi = 500 kHz; note 2
−
210
−
µV
THD
total harmonic distortion
Gv
voltage gain
Vi(rms)
input signal handling (RMS value)
Vo(n)
Po = 0.5 W
B
bandwidth
at −1 dB
−
note 3
−
dB
SVRR
supply voltage ripple rejection
note 4
34
38
−
dB
VOS
DC output offset voltage
|V13 - V11| and |V10 - V8|
−
0
200
mV
Zi
input impedance (pins 3 and 5)
15
20
25
kΩ
αcs
channel separation
RS = 5 kΩ
40
−
−
dB
Gv
channel unbalance
note 5
−
−
1
dB
G1 = 0 dB; note 6
−
−
1
dB
Vi = 1.0 V; note 7
−
35
45
µV
68
73.5
−
dB
V1 = V7 = 0 V
−20
−25
−30
µA
Mute position; V1 = V7 =0.4 V ±30 mV
Vo(mute)
output voltage in mute position
DC volume control
∆Gv
gain control range
lDC
volume control current
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
6
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
MBG672
40
TDA7057AQ
MBG675
12
handbook, halfpage
handbook, halfpage
Iq
(mA)
THD
(%)
30
8
(1)
(2)
20
4
10
0
10−2
0
0
4
8
12
16
VP (V)
20
10−1
1
Pout (W)
10
(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.
MBG674
MBG676
12
10
handbook, halfpage
handbook, halfpage
THD
(%)
Po
(W)
8
(1)
(2)
8
6
4
4
2
(1)
(2)
0
10−2
10−1
0
1
10
f (kHz)
0
102
8
12
16
VP (V)
20
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
Fig.5 THD as a function of frequency.
1998 Apr 07
4
7
Output power as a function of supply
voltage.
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
MBG677
15
TDA7057AQ
MBG667
80
handbook, halfpage
handbook, halfpage
Gv
(dB)
(1)
Pd
40
(W)
10
0
(2)
−40
5
−80
0
−120
0
4
8
12
16
VP (V)
20
0
0.4
0.8
1.2
2.0
1.6
VVC (V)
(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
1
MBG663
0
handbook, halfpage
handbook, halfpage
SVRR
(dB)
Vno
(mV)
−20
(1)
10−1
−40
−60
(2)
10−2
0
0.4
0.8
1.2
−80
10−2
1.6
2.0
VVC (V)
f = 22 Hz to 22 kHz.
Fig.9
1
10
f (kHz)
102
(1) VDC = 1.4 V; Vripple = 0.2 V.
(2) VDC = 0.4 V; Vripple = 0.2 V.
Noise voltage as a function of volume
control voltage.
1998 Apr 07
10−1
Fig.10 SVRR as a function of frequency.
8
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
MBG665
2.0
TDA7057AQ
MBG666
30
IVC
(µA)
20
handbook, halfpage
handbook, halfpage
Vin
(V)
1.6
10
1.2
0
0.8
−10
0.4
−20
−30
0
4
0
8
12
16
VP (V)
20
0
0.4
0.8
1.2
2.0
1.6
VVC (V)
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.
Test conditions
Thermal considerations:
Tamb = 25 °C unless otherwise specified; VP = 12 V;
VDC = 1.4 V; fi = 1 kHz; RL = 16 Ω.
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.
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 R th 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:
Rth h-a = Rth j-a − (Rth j-c + Rth c-h);
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.
1998 Apr 07
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.
9
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
TDA7057AQ
handbook, full pagewidth
(1)
100 nF
220 µF
VP = 12 V
4
TDA7057AQ
13
470 nF
input 1
I+i
3
1
(2)
Rs = 5 kΩ
I−i
STABILIZER
11
input 2
Rs = 5 kΩ
−
TEMPERATURE
MCL
PROTECTION
10
470 nF
+
−
I−i
5
7
(2)
I+i
DCvolume
6
signal
ground
8
9
+
12
power
ground
VP = 12 V
volume
control
1 µF
volume
control
1, 7 maximum voltage
gain 34 dB
1 µF
1 MΩ
100 kΩ
1, 7
maximum voltage
gain 40 dB
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.
1998 Apr 07
10
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
Dh
x
D
Eh
view B: mounting base side
d
A2
B
j
E
A
L3
L
Q
c
1
v M
13
e1
Z
e
bp
e2
m
w M
0
5
10 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
A2
bp
c
D (1)
d
Dh
E (1)
e
e1
e2
Eh
j
L
L3
m
Q
v
w
x
Z (1)
mm
17.0
15.5
4.6
4.2
0.75
0.60
0.48
0.38
24.0
23.6
20.0
19.6
10
12.2
11.8
3.4
1.7
5.08
6
3.4
3.1
12.4
11.0
2.4
1.6
4.3
2.1
1.8
0.8
0.25
0.03
2.00
1.45
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
ISSUE DATE
95-03-11
97-12-16
SOT141-6
1998 Apr 07
EUROPEAN
PROJECTION
11
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
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.
1998 Apr 07
12
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
NOTES
1998 Apr 07
13
TDA7057AQ
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
NOTES
1998 Apr 07
14
TDA7057AQ
Philips Semiconductors
Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
NOTES
1998 Apr 07
15
TDA7057AQ
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Tel. +34 3 301 6312, Fax. +34 3 301 4107
Sweden: Kottbygatan 7, Akalla, S-16485 STOCKHOLM,
Tel. +46 8 5985 2000, Fax. +46 8 5985 2745
Switzerland: Allmendstrasse 140, CH-8027 ZÜRICH,
Tel. +41 1 488 2741 Fax. +41 1 488 3263
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
Turkey: Talatpasa Cad. No. 5, 80640 GÜLTEPE/ISTANBUL,
Tel. +90 212 279 2770, Fax. +90 212 282 6707
Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7,
252042 KIEV, Tel. +380 44 264 2776, Fax. +380 44 268 0461
United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes,
MIDDLESEX UB3 5BX, Tel. +44 181 730 5000, Fax. +44 181 754 8421
United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,
Tel. +1 800 234 7381
Uruguay: see South America
Vietnam: see Singapore
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
Internet: http://www.semiconductors.philips.com
© 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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