Philips Tda7056A Users Manual 3 W BTL Mono Audio Output Amplifier With DC Volume Control

TDA7056A to the manual 37b15bc9-942d-46f3-83a5-ed025f9b48d9

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INTEGRATED CIRCUITS

DATA SHEET

TDA7056A
3 W BTL mono audio output
amplifier with DC volume control
Product specificiation
File under Integrated Circuits, IC01

July 1994

Philips Semiconductors

Product specificiation

3 W BTL mono audio output amplifier
with DC volume control

TDA7056A

FEATURES

GENERAL DESCRIPTION

• DC volume control

The TDA7056A is a mono BTL output amplifier with DC
volume control. It is designed for use in TV and monitors,
but 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 off clicks

A MCL protection circuits 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 headphone
applications (single-ended).

• Good overall stability
• Low power consumption
• Low HF radiation
• ESD protected on all pins.
QUICK REFERENCE DATA
SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

4.5

−

3.5

−

voltage gain

34.5

35.5

36.5

gain control range

−

total quiescent current

VP = 12 V; RL = ∞

−

THD

total harmonic distortion

VP = 0.5 W

−

0.3

positive supply voltage range

output power

RL = 16 Ω; VP = 12 V

ORDERING INFORMATION
PACKAGE

EXTENDED TYPE
NUMBER

PINS

PIN POSITION

MATERIAL

CODE

TDA7056A

SIL

plastic

SOT110

Note
1. SOT110-1; 1996 August 21.

July 1994

Philips Semiconductors

Product specificiation

3 W BTL mono audio output amplifier with
DC volume control

TDA7056A

handbook, full pagewidth

2
n.c.
n.c.

positive input
DC volume control

TDA7056A

I + i

I – i

positive output

3
5

STABILIZER
Vref

negative output

TEMPERATURE
PROTECTION

signal
ground

MGA072 - 1

power
ground

Fig.1 Block diagram.

PINNING
SYMBOL

DESCRIPTION

n.c.

not connected

positive supply voltage

voltage input

GND1

signal ground

DC volume control

OUT+

positive output

GND2

power ground

OUT−

n.c.

handbook, halfpage

n.c.

GND1

negative output

OUT+

not connected

GND2

OUT−

n.c.

TDA7056A

MGA071

Fig.2 Pin configuration.

July 1994

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.
Special attention is given to switch-on and 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

LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134).
SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

supply voltage range

−

IORM

repetitive peak output current

−

1.25

IOSM

non repetitive peak output current

−

1.5

Ptot

total power dissipation

−

Tamb

operating ambient temperature range

−40

+85

°C

Tstg

storage temperature range

−55

+150

°C

Tvj

virtual junction temperature

−

+150

°C

Tcase < 60 °C

Tsc

short-circuit time

−

input voltage pin 3

−

input voltage pin 5

−

THERMAL RESISTANCE
SYMBOL

PARAMETER

THERMAL RESISTANCE

Rth j-a

from junction to ambient in free air

55 K/W

Rth j-c

from junction to case

10 K/W

Note to the thermal resistance
VP = 12 V; RL = 16 Ω; 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

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 Ω; Tamb = 25 °C; unless otherwise specified (see Fig.6)
SYMBOL

PARAMETER

positive supply voltage range

total quiescent current

CONDITIONS

MIN.

MAX.

UNIT

−

VP = 12 V; RL = ∞; note 1 −

THD = 10%; RL = 16 Ω

3.5

−

THD = 10%; RL = 8 Ω

−

5.2

−

PO = 0.5 W

−

0.3

34.5

35.5

36.5

4.5

TYP.

Maximum gain (V5 = 1.4 V)
PO

output power

THD

total harmonic distortion

voltage gain

input signal handling

V5 = 0.8 V;THD < 1%

0.5

0.65

−

Vno(rms)

noise output voltage (RMS value)

f = 500 kHz; note 2

−

210

−

µV

bandwidth

at −1 dB

−

20 Hz to
300 kHz

−

SVRR

supply voltage ripple rejection

note 3

−

|Voff|

DC output offset voltage

−

150

input impedance pin 3

kΩ

Minimum gain (V5 = 0.5 V)
Gv

voltage gain

Vno(rms)

noise output voltage (RMS value)

−

−44

−

note 4

−

µV

V5 ≤ 0.3 V; VI = 600 mV

−

µV

−

µA

Mute position
VO

output voltage in mute position

DC volume control
φ

gain control range

control current

V5 = 0 V

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 Ω and bandwidth = 5 kHz.
3. The ripple rejection is measured with RS = 0 Ω 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 kΩ unweighted.

July 1994

Philips Semiconductors

Product specificiation

3 W BTL mono audio output amplifier with
DC volume control

TDA7056A

MGA075

MGA076 - 1

1000
handbook,
halfpage

handbook,40
halfpage

gain

Vnoise
(µV)
800

(dB)
20

0
600
– 20
400
– 40
200

– 60

– 80
0

0.4

0.8

1.2

1.6

2.0
V5 (V)

MGA077 - 1

100

I5
(µA)
60

– 20

– 60

– 100
0.8

1.2

1.6

2.0
V5 (V)

Fig.5 Control current as a function of DC volume
control.

July 1994

1.2

2.0

1.6

Fig.4 Noise output voltage as a function of DC
volume control.

handbook, halfpage

0.4

0.8

V5 (V)

Fig.3 Gain as a function of DC volume control.

0.4

Philips Semiconductors

Product specificiation

3 W BTL mono audio output amplifier with
DC volume control

TDA7056A

APPLICATION INFORMATION

(1)
VP

handbook, full pagewidth

100
nF

220 µF

2
1

n.c.

n.c.
0.47 µF

positive
input

TDA7056A

I + i

3
5

R L = 16 Ω

I – i

5
kΩ

STABILIZER
Vref

TEMPERATURE
PROTECTION

DC
volume
control

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

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

D1
q
P

A3
q1

A
A4
seating plane

E
pin 1 index

L
1

9
b

w M

10 mm

scale
DIMENSIONS (mm are the original dimensions)
UNIT

A2
max.

D (1)

E (1)

Z (1)
max.

18.5
17.8

3.7

8.7
8.0

15.8
15.4

1.40
1.14

0.67
0.50

1.40
1.14

0.48
0.38

21.8
21.4

21.4
20.7

6.48
6.20

2.54

3.9
3.4

2.75
2.50

3.4
3.2

1.75
1.55

15.1
14.9

4.4
4.2

5.9
5.7

0.25

1.0

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

REFERENCES
IEC

JEDEC

EIAJ

ISSUE DATE
92-11-17
95-02-25

SOT110-1

July 1994

EUROPEAN
PROJECTION

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

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.

July 1994

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File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.3
Linearized                      : Yes
Encryption                      : Standard V1.2 (40-bit)
User Access                     : Print, Copy, Annotate, Fill forms, Extract, Assemble, Print high-res
Create Date                     : 1997:06:09 10:13:13
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Creator                         : Frame 4.0
Title                           : 3 W BTL mono audio output amplifier with DC volume control
Subject                         : TDA7056A
Author                          : Philips Semiconductors
Keywords                        : 3 W BTL mono audio output amplifier with DC volume control, TDA7056A, TDA7056A/N2 TDA7056A/N2/S12
Modify Date                     : 2000:11:05 14:07:40+01:00
Page Count                      : 9
Page Mode                       : UseOutlines
Page Layout                     : SinglePage

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Philips Tda7056A Users Manual 3 W BTL Mono Audio Output Amplifier With DC Volume Control

TDA7056A to the manual 37b15bc9-942d-46f3-83a5-ed025f9b48d9

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