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INTEGRATED CIRCUITS

DATA SHEET

TDA7050
Low voltage mono/stereo power
amplifier
Product specification
File under Integrated Circuits, IC01

June 1989

Philips Semiconductors

Product specification

Low voltage mono/stereo power amplifier

TDA7050

GENERAL DESCRIPTION
The TDA7050 is a low voltage audio amplifier for small radios with headphones (such as watch, pen and pocket radios)
in mono (bridge-tied load) or stereo applications.
Features
• Limited to battery supply application only (typ. 3 and 4 V)
• Operates with supply voltage down to 1,6 V
• No external components required
• Very low quiescent current
• Fixed integrated gain of 26 dB, floating differential input
• Flexibility in use − mono BTL as well as stereo
• Small dimension of encapsulation (see package design example)
QUICK REFERENCE DATA
1,6 to 6,0 V

Supply voltage range

VP

Total quiescent current (at VP = 3 V)

Itot

typ.

3,2 mA

Po

typ.

140 mW

max.

70 mV

Vno(rms)

typ.

140 µV

dtot = 10%; VP = 3 V

Po

typ.

35 mW

dtot = 10%; VP = 4,5 V

Po

typ.

75 mW

α

typ.

40 dB

Vno(rms)

typ.

100 µV

Bridge tied load application (BTL)
Output power at RL = 32 Ω
VP = 3 V; dtot = 10%
D.C. output offset voltage between the outputs

|∆V|

Noise output voltage (r.m.s. value)
at f = 1 kHz; RS = 5 kΩ
Stereo application
Output power at RL = 32 Ω

Channel separation at RS = 0 Ω; f = 1 kHz
Noise output voltage (r.m.s. value)
at f = 1 kHz; RS = 5 kΩ
PACKAGE OUTLINE
8-lead DIL; plastic (SOT97); SOT97-1; 1996 July 23.

June 1989

2

Philips Semiconductors

Product specification

Low voltage mono/stereo power amplifier

TDA7050

RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
Supply voltage

VP

max.

6V

Peak output current

IOM

max.

150 mA

Total power dissipation

see derating curve Fig.1

Storage temperature range

Tstg

−55 to + 150 °C

Crystal temperature

Tc

max.

100 °C

tsc

max.

5s

A.C. and d.c. short-circuit duration
at VP = 3,0 V (during mishandling)

Fig.1 Power derating curve.

THERMAL RESISTANCE
From junction to ambient

June 1989

Rthj-a

3

=

110 K/W

Philips Semiconductors

Product specification

Low voltage mono/stereo power amplifier

TDA7050

CHARACTERISTICS
VP = 3 V; f = 1 kHz; RL = 32 Ω; Tamb = 25 °C; unless otherwise specified
PARAMETER

SYMBOL

MIN.

TYP.

MAX.

UNIT

Supply
Supply voltage

VP

1,6

−

6,0

V

Total quiescent current

Itot

−

3,2

4

mA

Bridge-tied load application (BTL); see Fig.4
Output power; note 1
VP = 3,0 V; dtot = 10%

Po

−

140

−

mW

VP = 4,5 V; dtot = 10% (RL = 64 Ω)

Po

−

150

−

mW

Gv

−

32

−

dB

RS = 5 kΩ; f = 1 kHz

Vno(rms)

−

140

−

µV

RS = 0 Ω; f = 500 kHz; B = 5 kHz

Vno(rms)

−

tbf

−

µV

Voltage gain
Noise output voltage (r.m.s. value)

D.C. output offset voltage (at RS = 5 kΩ)

|∆V|

−

−

70

mV

Input impedance (at RS = ∞)

|Zi|

1

−

−

MΩ

Input bias current

Ii

−

40

−

nA

Po

−

35

−

mW

Stereo application; see Fig.5
Output power; note 1
VP = 3,0 V; dtot = 10%

Po

−

75

−

mW

Gv

24.5

26

27.5

dB

RS = 5 kΩ; f = 1 kHz

Vno(rms)

−

100

−

µV

RS = 0 Ω; f = 500 kHz; B = 5 kHz

Vno(rms)

−

tbf

−

µV

α

30

40

−

dB

Input impedance (at RS = ∞)

|Zi|

2

−

−

MΩ

Input bias current

Ii

−

20

−

nA

VP = 4,5 V; dtot = 10%
Voltage gain
Noise output voltage (r.m.s. value)

Channel separation
RS = 0 Ω; f = 1 kHz

Note
1. Output power is measured directly at the output pins of the IC. It is shown as a function of the supply voltage in Fig.2
(BTL application) and Fig.3 (stereo application).

June 1989

4

Philips Semiconductors

Product specification

Low voltage mono/stereo power amplifier

Fig.2

Fig.3

June 1989

TDA7050

Output power across the load impedance (RL) as a function of supply voltage (VP) in BTL application.
Measurements were made at f = 1 kHz; dtot = 10%; Tamb = 25 °C.

Output power across the load impedance (RL) as a function of supply voltage (VP) in stereo application.
Measurements were made at f = 1 kHz; dtot = 10%; Tamb = 25 °C.

5

Philips Semiconductors

Product specification

Low voltage mono/stereo power amplifier
APPLICATION INFORMATION

Fig.4 Application diagram (BTL); also used as test circuit.

Fig.5 Application diagram (stereo); also used as test circuit.

June 1989

6

TDA7050

Philips Semiconductors

Product specification

Low voltage mono/stereo power amplifier

TDA7050

PACKAGE OUTLINE
DIP8: plastic dual in-line package; 8 leads (300 mil)

SOT97-1

ME

seating plane

D

A2

A

A1

L

c
Z

w M

b1
e

(e 1)

b

MH

b2
5

8

pin 1 index
E

1

4

0

5

10 mm

scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT

A
max.

A1
min.

A2
max.

b

b1

b2

c

D (1)

E (1)

e

e1

L

ME

MH

w

Z (1)
max.

mm

4.2

0.51

3.2

1.73
1.14

0.53
0.38

1.07
0.89

0.36
0.23

9.8
9.2

6.48
6.20

2.54

7.62

3.60
3.05

8.25
7.80

10.0
8.3

0.254

1.15

inches

0.17

0.020

0.13

0.068
0.045

0.021
0.015

0.042
0.035

0.014
0.009

0.39
0.36

0.26
0.24

0.10

0.30

0.14
0.12

0.32
0.31

0.39
0.33

0.01

0.045

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

OUTLINE
VERSION

IEC

JEDEC

SOT97-1

050G01

MO-001AN

June 1989

EIAJ

EUROPEAN
PROJECTION

ISSUE DATE
92-11-17
95-02-04

7

Philips Semiconductors

Product specification

Low voltage mono/stereo power amplifier

TDA7050

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.

June 1989

8

www.s-manuals.com



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