TDA7050.PDF

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

Supply voltage range

V P

1,6 to 6,0 V

Total quiescent current (at V P = 3 V)

I tot

typ.

3,2 mA

Bridge tied load application (BTL)

Output power at R L = 32

V P = 3 V; d tot = 10%

P o

typ. 140 mW

D.C. output offset voltage between the outputs

max.

70 mV

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

at f = 1 kHz; R S = 5 k

V no(rms)

typ. 140

Stereo application

Output power at R L = 32

d tot = 10%; V P = 3 V

P o

typ.

35 mW

d tot = 10%; V P = 4,5 V

P o

typ.

75 mW

Channel separation at R S = 0

; f = 1 kHz

typ.

40 dB

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

at f = 1 kHz; R S = 5 k

V no(rms)

typ. 100

PACKAGE OUTLINE

8-lead DIL; plastic (SOT97); SOT97-1; 1996 July 23.

June 1989

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

V P

max.

6 V

Peak output current

I OM

max.

150 mA

Total power dissipation

see derating curve Fig.1

Storage temperature range

T stg

55 to + 150

Crystal temperature

T c

max.

100

A.C. and d.c. short-circuit duration

at V P = 3,0 V (during mishandling)

t sc

max.

5 s

Fig.1 Power derating curve.

THERMAL RESISTANCE

From junction to ambient

R thj-a =

110 K/W

June 1989

Philips Semiconductors

Product speciﬁcation

Low voltage mono/stereo power ampliﬁer

TDA7050

CHARACTERISTICS

V P = 3 V; f = 1 kHz; R L = 32 W ; T amb = 25 ° C; unless otherwise speciﬁed

PARAMETER

SYMBOL

MIN.

TYP.

MAX.

UNIT

Supply

Supply voltage

V P

1,6

6,0

Total quiescent current

I tot

3,2

Bridge-tied load application (BTL); see Fig.4

Output power; note 1

V P = 3,0 V; d tot = 10%

P o

140

V P = 4,5 V; d tot = 10% (R L = 64

)

P o

150

Voltage gain

G v

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

R S = 5 k

; f = 1 kHz

V no(rms)

140

R S = 0

; f = 500 kHz; B = 5 kHz

V no(rms)

tbf

D.C. output offset voltage (at R S = 5 k

)

Input impedance (at R S = ¥ )

|Z i |

M W

Input bias current

I i

Stereo application; see Fig.5

Output power; note 1

V P = 3,0 V; d tot = 10%

P o

V P = 4,5 V; d tot = 10%

P o

Voltage gain

G v

24.5

27.5

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

R S = 5 k W ; f = 1 kHz

V no(rms)

100

m V

R S = 0

; f = 500 kHz; B = 5 kHz

V no(rms)

tbf

Channel separation

R S = 0

; f = 1 kHz

Input impedance (at R S = ¥ )

|Z i |

M W

Input bias current

I i

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

Philips Semiconductors

Product speciﬁcation

Low voltage mono/stereo power ampliﬁer

TDA7050

Fig.2 Output power across the load impedance (R L ) as a function of supply voltage (V P ) in BTL application.

Measurements were made at f = 1 kHz; d tot = 10%; T amb = 25 ° C.

Fig.3 Output power across the load impedance (R L ) as a function of supply voltage (V P ) in stereo application.

Measurements were made at f = 1 kHz; d tot = 10%; T amb = 25

June 1989

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