Datasheet tda7056b DATASHEETS (Philips)

INTEGRATED CIRCUITS

DATA SH EET

TDA7056B

5 W mono BTL audio amplifier with
DC volume control

Preliminary specification
Supersedes data of July 1994
File under Integrated Circuits, IC01

1996 May 28

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC

TDA7056B

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

O

G

v(max)

supply voltage 4.5 − 18 V
output power VP=12V

maximum total voltage gain 39.5 40.5 41.5 dB
φ gain control 68 73.5 − dB
I

q(tot)

total quiescent current VP= 12 V; RL= ∞− 9.2 13 mA
THD total harmonic distortion P

GENERAL DESCRIPTION

The TDA7056B is a mono Bridge-Tied Load (BTL) output
amplifier with DC volume control.
It is designed for use in TV and monitors, but is also
suitable for battery-fed portable recorders and radios.
The device is contained in a 9-pin medium power
package.

A Missing Current Limiter (MCL) is built in. The MCL circuit
is activated when the difference in current between the
output terminal of each amplifier exceeds 100 mA
(300 mA typ.). This level of 100 mA allows for headphone
applications (single-ended).

=16Ω 3 3.5 − W

R

L

=8Ω−5−W

R

L

= 0.5 W − 0.3 1 %

O

ORDERING INFORMATION

TYPE

NUMBER

TDA7056B SIL9MPF

NAME DESCRIPTION VERSION

plastic single in-line medium power package with fin; 9 leads

1996 May 28 2

PACKAGE

SOT110-1

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC
volume control

BLOCK DIAGRAM

handbook, full pagewidth

n.c.
n.c.

input

DC volume control

1

V

ref

TDA7056B

STABILIZER

TEMPERATURE

PROTECTION

9

3

5

TDA7056B

V

P

2

6I + i

positive output

I – i

8

negative output

PINNING

SYMBOL PIN DESCRIPTION

n.c. 1 not connected
V

P

V

I

2 positive supply voltage

3 voltage input
GND1 4 signal ground
VC 5 DC volume control
OUT+ 6 positive output
GND2 7 power ground
OUT− 8 negative output
n.c. 9 not connected

Fig.1 Block diagram.

handbook, halfpage

signal

ground

4

n.c.
V

GND1

VC
OUT
GND2
OUT

n.c.

power

ground

P

V

I

7

1
2
3
4

TDA7056B

5
6
7
8
9

MSA708 - 1

1996 May 28 3

MSA707

Fig.2 Pin configuration.

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC
volume control

FUNCTIONAL DESCRIPTION

The TDA7056B is a mono BTL output amplifier with DC
volume control, designed for use in TV and monitor but is
also suitable for battery-fed portable recorders and radios.

In conventional DC volume circuits the control or input
stage is AC coupled to the output stage via external
capacitors to keep the offset voltage low. In the TDA7056B
the DC volume control stage is integrated into the input
stage so that no coupling capacitors are required. With this
configuration, a low offset voltage is still maintained and
the minimum supply voltage 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.
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.

TDA7056B

The maximum gain of the amplifier is fixed at 40.5 dB.
The DC volume control stage has 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 short-circuit proof to ground, V
across the load. Also a thermal protection circuit is
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.

Power dissipation

Assume V

= 12 V; RL=16Ω.

P

The maximum sine wave dissipation is = 1.8 W.
The R

Therefore T

of the package is 55 K/W.

th vj-a

amb (max)

= 150 − 55 × 1.8 = 51 °C.

and

P

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

P

V

3, 5

I

ORM

I

OSM

P

tot

T

amb

T

stg

T

vj

T

sc

supply voltage − 18 V
input voltage pins 3 and 5 − 5V
repetitive peak output current − 1.25 A
non-repetitive peak output current − 1.5 A
total power dissipation T

< 60 °C − 9W

case

operating ambient temperature −40 +85 °C
storage temperature −55 +150 °C
virtual junction temperature − +150 °C
short-circuit time − 1h

THERMAL CHARACTERISTICS

SYMBOL PARAMETER VALUE UNIT

R
R

th j-a
th j-c

thermal resistance from junction to ambient in free air 55 K/W
thermal resistance from junction to case 10 K/W

1996 May 28 4

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC

TDA7056B

volume control

CHARACTERISTICS

= 12 V; VDC= 1.4 V; f = 1 kHz; RL=16Ω; T

V

P

SYMBOL P ARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

P

I

q(tot)

Maximum gain (V

P

O

positive supply voltage 4.5 − 18 V
total quiescent current note 1; RL= ∞−9.2 13 mA

≥ 1.4 V)

5

output power THD = 10%; RL=16Ω 3 3.5 − W

THD total harmonic distortion P
G

v(max)

V

I

V

no

maximum total voltage gain 39.5 40.5 41.5 dB
input signal handling (RMS value) G

noise output voltage (RMS value) note 2; f = 500 kHz − 210 −µV
B bandwidth at −1dB − 0.02 to 300 − kHz
SVRR supply voltage ripple rejection note 3 34 38 − dB

 DC output offset voltage V8− v6−0 200 mV

∆V

O

Z

I

input impedance (pin 3) 15 20 25 kΩ

Mute position

V

O

output voltage in mute position note 4; V5= 0.4 V ±30 mV;

=25°C; unless otherwise specified (see Fig.13).

amb

THD = 10%; R

= 0.5 W − 0.3 1 %

O

= 0 dB; THD < 1% 1.0 −−V

v(max)

=8Ω−5 −W

L

− 30 40 µV

VI= 1.0 V
DC volume control; note 5
φ gain control 68 73.5 − dB

I

5

control current V5= 0 V 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 f = 500 kHz is measured with RS=0Ω and B = 5 kHz.

3. The ripple rejection is measured with RS=0Ω and f = 100 Hz to 10 kHz. The ripple voltage VR of 200 mV
(RMS value) is applied to the positive supply rail.

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

5. The DC volume control can be configured in several ways. Two possible circuits are shown in Figs 14 and 15.
The circuits at the volume control pin will influence the switch-on and switch-off behaviour and the maximum voltage
gain.

1996 May 28 5

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC
volume control

40

handbook, halfpage

G

v

(dB)

0

−40

−80

−120

0 2.0

0.4 0.8 1.2 1.6

MBH372

V (V)

DC

handbook, halfpage

1

V

no

(mV)

−1

10

−2

10

Measured with RS=5kΩ unweighted.
Frequency range is 22 Hzto 22 kHz.

0.4 0.8 1.2 1.6

TDA7056B

MBH365

20

VDC (V)

Fig.3 Gain control as a function of DC volume

control.

25

handbook, halfpage

I

DC

(µA)

15

5

−5

−15

−25

0 2.0

0.4 0.8 1.2 1.6

MBH376

VDC (V)

Fig.4 Noise output voltage as a function of DC

volume control.

20

handbook, halfpage

I

P

(mA)

15

10

5

020

4

81216

MBH367

V

P

(V)

Fig.5 Control current as a function of DC volume

control.

1996 May 28 6

Measured with RL= ∞.

Fig.6 Quiescent current versus supply voltage.

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC
volume control

(1)

PO (W)

MBH361

(2)

10

10

handbook, halfpage

THD

(%)

8

6

4

2

0

-1

10

(1) RL16 Ω.
(2) RL=8Ω.

1

Fig.7 Total harmonic distortion versus output

power.

TDA7056B

10

handbook, halfpage

THD

(%)

8

6

4

2

0

−2

10

PO= 0.1 W.
(1) G

v(max)

(2) G

v(max)

=40dB.
=30dB.

(1)

(2)

−1

10

110

Fig.8 Total harmonic distortion versus frequency.

MBH362

f (kHz)

2

10

(2)

MBH363

V

(V)

P

10

handbook, halfpage

P

O

(W)

8

6

4

2

0

020

Measured at a THD of 10%. The maximum output power is limited by
the maximum power dissipation and the maximum available output
current.

=8Ω.

(1) R

L

(2) RL=16Ω.

4

(1)

81216

Fig.9 Output power versus supply voltage.

handbook, halfpage

6

P

d

(W)

5

4

3

2

1

0

020

(1) RL=8Ω.
(2) RL=16Ω.

(1) (2)

4

81216

MBH364

V

(V)

P

Fig.10 Total worst case power dissipation versus

supply voltage.

1996 May 28 7

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC
volume control

−20

handbook, halfpage

SVRR

(dB)

−30

−40

−50

−60

−70

−2

10

Measured with VR= 0.2 V.
(1) VDC= 1.4 V.
(2) VDC= 0.4 V.

(1)

(2)

−1

10

11010

MBH374

f (kHz)

2

2.0

handbook, halfpage

V

I

(V)

1.6

1.2

0.8

0.4

0

020

Measured at a THD of 1% and a voltage gain of 0 dB.

4

81216

TDA7056B

MBH375

V

(V)

P

Fig.11 Supply voltage ripple rejection versus

frequency.

Fig.12 Input signal handling.

1996 May 28 8

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC
volume control

TEST AND APPLICATION INFORMATION

handbook, full pagewidth

1

input

5 kΩ

n.c.

9

n.c.

0.47 µF

R

S

volume

control

3
5

DC

TDA7056B

STABILIZER

TEMPERATURE

PROTECTION

2

I + i

I − i

(1)

100 nF 220 µF

6

8

4

7

TDA7056B

VP = 12 V

RL = 16 Ω

ground

To avoid instabilities and too high distortion, the input- and power ground must be separated as long as possible and connected together as close as
possible to the IC.

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

MSA709 - 2

Fig.13 Test and application diagram.

For single-end application the output peak current may not exceed 100 mA; at higher output currents the short circuit
protection (MLC) will be activated.

1996 May 28 9

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC
volume control

handbook, halfpage

volume

control

1 MΩ1 µF

5

MSA710

handbook, halfpage

volume
control

1 µF

TDA7056B

VP = 12 V

100 kΩ

5

22 kΩ

MBH366

Fig.14 Application with potentiometer as volume

control; maximum gain = 34 dB.

Fig.15 Application with potentiometer as volume

control; maximum gain = 40 dB.

1996 May 28 10

Philips Semiconductors Preliminary specification

5 W mono BTL audio amplifier with DC
volume control

PACKAGE OUTLINE

SIL9MPF: plastic single in-line medium power package with fin; 9 leads

D

D

1

q

P

P

1

q

2

q

1

TDA7056B

SOT110-1

A

2

A

3

pin 1 index

seating plane

19

Z

b

DIMENSIONS (mm are the original dimensions)

A

A

18.5

17.8

max.

3.7

2

A

A

3

4

8.7

15.8

8.0

15.4

UNIT

mm

Note

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

e

2

b

0.67

0.50

b

1

2

1.40

0.48

1.14

0.38

bcD

1.40

1.14

b

b

1

0 5 10 mm

scale

(1)

D

1

21.8

21.4

21.4

20.7

w M

(1)

E

eLPP

6.48

6.20

2.54

3.9

3.4

A

A

4

L

Q

q1q

q

Q

1

3.4

3.2

1.75

1.55

15.1

14.9

4.4

4.2

2.75

2.50

c

5.9

5.7

E

2

w

0.25

(1)

Z

max.

1.0

OUTLINE
VERSION

SOT110-1

1996 May 28 11

REFERENCES

IEC JEDEC EIAJ

EUROPEAN

PROJECTION

ISSUE DATE

92-11-17
95-02-25

Philips Semiconductors Preliminary specification

5 W mono BTL audio 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

“IC Package Databook”

our

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).

TDA7056B

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.

1996 May 28 12