Datasheet TDA7057AQ Specification

INTEGRATED CIRCUITS

DATA SH EET

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

TDA7057AQ

with DC volume control

FEATURES

• DC volume control

• Few external components

• Mute mode

• Thermal protection

• Short-circuit proof

• No switch-on and switch-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

out

G

v

∆G

v

I

q(tot)

supply voltage 4.5 − 18 V
output power VP= 12 V; RL=16Ω 3.0 3.5 − W

voltage gain 39.5 40.5 41.5 dB
voltage gain control 68 73.5 − dB
total quiescent current VP= 12 V; RL= ∞−22 25 mA

THD total harmonic distortion P

GENERAL DESCRIPTION

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.

Missing Current Limiter (MCL)

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.

= 12 V; RL=8Ω− 5.3 − W

V

P

V

= 15 V; RL=8Ω− 8 − W

P

= 0.5 W − 0.3 1 %

o

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

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

BLOCK DIAGRAM

handbook, full pagewidth

TDA7057AQ

input 1

DC volume

control 1

3

1

STABILIZER

V

ref

V

P

4

I i

Ι

I i

TEMPERATURE

PROTECTION

TDA7057AQ

13

positive
output 1

11

negative
output 1

input 2

DC volume

control 2

5

7

2

not

connected

I i

ΙΙ

I i

12

power

ground 1

signal

ground

6

Fig.1 Block diagram.

9

power

ground 2

negative

10

output 2

8

positive
output 2

MSA714

1998 Apr 07 3

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier
with DC volume control

PINNING

SYMBOL PIN DESCRIPTION

VC1 1 DC volume control 1
n.c. 2 not connected
V

l (1)

V

P

V

l (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

3 voltage input 1
4 positive supply voltage
5 voltage input 2

handbook, halfpage

VC1

n.c.

V

I (1)

V

V

I (2)

SGND

VC2
OUT2
PGND2
OUT2
OUT1
PGND1
OUT1

P

1
2
3
4
5
6
7

TDA7057AQ

8

9
10
11
12
13

TDA7057AQ

MSA716

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.

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 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.

Consequently, a reduced power supply with smaller
capacitors can be used which results in cost reductions.

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.

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.

The amplifier is a short-circuit protected to ground, V

and

P

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 switch-off
clicks, low HF radiation and a good overall stability.

1998 Apr 07 4

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier

TDA7057AQ

with DC volume control

LIMITING VALUES

In accordance with the Absolute Maximum Rating 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

n

THERMAL CHARACTERISTICS

SYMBOL PARAMETER VALUE UNIT

R

th j-c

R

th j-a

supply voltage − 18 V
repetitive peak output current − 1.25 A
non-repetitive peak output current − 1.5 A
total power dissipation T

<60°C − 22.5 W

case

operating ambient temperature −40 +85 °C
storage temperature −55 +150 °C
virtual junction temperature − 150 °C
short-circuit time − 1hr
input voltage pins 1, 3, 5 and 7 − 5V

thermal resistance from junction to case 4 K/W
thermal resistance from junction to ambient in free air 40 K/W

Power dissipation

Assume V
At T

amb(max)

R

th tot

R

th tot=Rth j-c+Rth c-hs+Rth hs

R

th c-hs+Rth hs

= 12 V and RL=16Ω. The maximum sine wave dissipation is 2 × 1.8 W = 3.6 W.

P

=60°C:

= (150 − 60)/3.6 = 25 K/W.

=25−4 = 21 K/W.

.

1998 Apr 07 5

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier

TDA7057AQ

with DC volume control

CHARACTERISTICS

VP=12V;T

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

I

q(tot)

Maximum gain; V

P

o

THD total harmonic distortion P
G

v

V

i(rms)

V

o(n)

B bandwidth at −1dB − note 3 − dB
SVRR supply voltage ripple rejection note 4 34 38 − dB

V

 DC output offset voltage |V13-V11| and |V10-V8|− 0 200 mV

OS

Z

i

α

cs

G

 channel unbalance note 5 −−1dB

v

Mute position; V

V

o(mute)

DC volume control

∆G

v

l

DC

=25°C; fi= 1 kHz; RL=16Ω; unless otherwise specified (see Fig.13).

amb

voltage supply 4.5 − 18.5 V
total quiescent current VP= 12 V; RL= ∞; note 1 − 22 25 mA

≥ 1.4 V

1,7

output power THD = 10%; RL=16Ω 3.0 3.5 − W

THD = 10%; R
THD=10%; R

=8Ω− 5.3 − W

L

=8Ω;

L

− 8 − W

VP=15V

= 0.5 W − 0.3 1 %

o

voltage gain 39.5 40.5 41.5 dB
input signal handling (RMS value) Gv= 0 dB; THD < 1% 1 −−V
noise output voltage fi= 500 kHz; note 2 − 210 −µV

input impedance (pins 3 and 5) 15 20 25 kΩ
channel separation RS=5kΩ 40 −−dB

= 0 dB; note 6 −−1dB

G

1

=0.4 V ±30 mV

1=V7

output voltage in mute position Vi= 1.0 V; note 7 − 35 45 µV

gain control range 68 73.5 − dB
volume control current V1=V7=0V −20 −25 −30 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 R

.

L

2. The noise output voltage (RMS value) at fi= 500 kHz is measured with RS=0Ω and bandwidth = 5 kHz.

3. 20 Hz to 300 kHz (typical.

4. The ripple rejection is measured with RS=0Ω and f = 100 Hz to 10 kHz. The ripple voltage (V

= 200 mV RMS)

ripple

is applied to the positive supply rail.

5. The channel unbalance is measured with V

DC1=VDC2

6. The channel unbalance at G1= 0 dB is measured with V

.

DC1=VDC2

.

7. The noise output voltage (RMS value) is measured with RS=5kΩ unweighted.

1998 Apr 07 6

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier
with DC volume control

40

handbook, halfpage

I

q

(mA)

30

20

10

0

04 20

81216

MBG672

V

(V)

P

12

handbook, halfpage

THD

(%)

8

4

0

−2

10

TDA7057AQ

MBG675

(1) (2)

−1

10

1

P

out

(W)

10

Fig.3 Quiescent current as a function of supply

voltage.

10110

MBG674

f (kHz)

10

handbook, halfpage

THD

(%)

8

6

4

2

0

−2

(1) Gv= 40dB; Po= 0.5W.
(2) Gv= 30dB; Po= 0.5W.

(1)

(2)

−1

10

Fig.5 THD as a function of frequency.

(1) RL=16Ω.
(2) RL=8Ω.

Fig.4 THD as a function of output power.

12

handbook, halfpage

P

o

(W)

8

4

0

2

10

0204 8 12 16

THD =10%; f = 1 kHz.
(1) RL=8Ω.
(2) RL=16Ω.

MBG676

(1)

(2)

VP (V)

Fig.6 Output power as a function of supply

voltage.

1998 Apr 07 7

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier
with DC volume control

15

handbook, halfpage

P

d

(W)

10

5

0

020

(1) RL=8Ω.
(2) RL=16Ω.

4 8 12 16

MBG677

(1)

(2)

VP (V)

80

handbook, halfpage

G

v

(dB)

40

0

−40

−80

−120

0

TDA7057AQ

0.4 0.8 1.2 1.6

MBG667

VVC (V)

2.0

Fig.7 Total worst case power dissipation as a

function of supply voltage.

V

no

(mV)

10

10

1

−1

−2

0

0.4 0.8 1.2 1.6
VVC (V)

handbook, halfpage

MBG678

2.0

Fig.8 Voltage gain as a function of volume control

voltage.

10110

MBG663

f (kHz)

10

SVRR

(dB)

−20

−40

−60

−80

0

−2

handbook, halfpage

(1)

(2)

−1

10

2

f = 22 Hz to 22 kHz.

Fig.9 Noise voltage as a function of volume

control voltage.

1998 Apr 07 8

(1) VDC= 1.4 V; V
(2) VDC= 0.4 V; V

ripple
ripple

= 0.2 V.
= 0.2 V.

Fig.10 SVRR as a function of frequency.

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier
with DC volume control

2.0

handbook, halfpage

V

in

(V)

1.6

1.2

0.8

0.4

0

020

4 8 12 16

MBG665

V

(V)

P

30

handbook, halfpage

I

VC

(µA)

20

10

0

−10

−20

−30

0

TDA7057AQ

0.4 0.8 1.2 1.6

MBG666

VVC (V)

2.0

THD = 1 %.

Fig.11 Input signal handling.

APPLICATION INFORMATION

The application diagram is illustrated in Fig.13.

Test conditions

T

=25°C unless otherwise specified; VP=12V;

amb

VDC= 1.4 V; fi= 1 kHz; RL=16Ω.
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.

The maximum input signal voltage is measured at
THD = 1% at the output with a voltage gain of 0 dB.

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 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.

Fig.12 Volume control current as a function of

volume control voltage.

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.

Thermal considerations:

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.

Calculation example for application: V

= 15 V; RL=8Ω,

P

stereo sine wave; worst case sine wave power dissipation
is 12 W.

For T

amb(max)

to ambient

=40°C the thermal resistance from junction

R

th j-a

125 40–()

----------------------------­12

7.1 K/W==

The thermal resistance of the heatsink becomes:
R

th h-a=Rth j-a

= 7.1 − (4 + 0.1) = 3 K/W.

R

th h-a

− (R

th j-c+Rth c-h

);

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 9

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier
with DC volume control

handbook, full pagewidth

TDA7057AQ

470 nF

input 1

Rs = 5 kΩ

3
1

STABILIZER

TEMPERATURE

PROTECTION

I + i

I − i

MCL

TDA7057AQ

(1)

100 nF

4

220 µF

13

11

VP = 12 V

+

(2)

−

input 2

Rs = 5 kΩ

volume

control

470 nF

DC-

volume

1 MΩ1 µF

1, 7

maximum voltage

5
7

gain 34 dB

signal

ground

I − i

I + i

9 126

power

ground

volume

control

1 µF

100 kΩ

1, 7

22 kΩ

10

−

8

+

VP = 12 V

maximum voltage

gain 40 dB

MBG679

(2)

(1) This capacitor can be omitted if the 220 µF electrolytic capacitor is connected close to pin 5.
(2) RL=16Ω.

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

PACKAGE OUTLINE

DBS13P: plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)

non-concave

x

D

E

h

d

A

TDA7057AQ

D

h

view B: mounting base side

2

SOT141-6

j

113

e

Z

DIMENSIONS (mm are the original dimensions)

UNIT A e

mm

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

A2bpcD

17.0

4.6

4.2

0.75

0.60

15.5

1

e

(1)

deD

0.48

24.0

23.6

20.0

19.6

0.38

b

p

h

10 3.4

w M

0 5 10 mm

(1)

E

12.2

11.8

scale

1

1.7

e

5.08

B

E

A

L

3

L

E

2

h

6

Q

m

LL3m

3.4

12.4

3.1

11.0

2.4

1.6

c

e

2

4.3

2.1

1.8

v M

(1)

v

Qj

0.8

0.25w0.03

Z

x

2.00

1.45

OUTLINE

VERSION

SOT141-6

IEC JEDEC EIAJ

REFERENCES

1998 Apr 07 11

EUROPEAN

PROJECTION

ISSUE DATE

95-03-11
97-12-16

Philips Semiconductors Product specification

2 × 8 W stereo BTL 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
our

“IC Package Databook”

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).

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 (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.

1998 Apr 07 12

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier
with DC volume control

NOTES

TDA7057AQ

1998 Apr 07 13

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier
with DC volume control

NOTES

TDA7057AQ

1998 Apr 07 14

Philips Semiconductors Product specification

2 × 8 W stereo BTL audio output amplifier
with DC volume control

NOTES

TDA7057AQ

1998 Apr 07 15

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© Philips Electronics N.V. 1998 SCA59
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Printed in The Netherlands 545102/1200/04/pp16 Date of release: 1998 Apr 07 Document order number: 9397 750 03255