DATA SHEET
Product specification
File under Integrated Circuits, IC01
June 1989
INTEGRATED CIRCUITS
TDA7050
Low voltage mono/stereo power
amplifier
June 1989
2
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
PACKAGE OUTLINE
8-lead DIL; plastic (SOT97); SOT97-1; 1996 July 23.
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
|
V|
max.
70 mV
Noise output voltage (r.m.s. value)
at f = 1 kHz; R
S
= 5 k
V
no(rms)
typ.
140
V
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
V
June 1989
3
Philips Semiconductors
Product specification
Low voltage mono/stereo power amplifier
TDA7050
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
THERMAL RESISTANCE
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
C
Crystal temperature
T
c
max.
100
C
A.C. and d.c. short-circuit duration
at V
P
= 3,0 V (during mishandling)
t
sc
max.
5 s
From junction to ambient
R
thj-a
=
110 K/W
Fig.1 Power derating curve.
June 1989
4
Philips Semiconductors
Product specification
Low voltage mono/stereo power amplifier
TDA7050
CHARACTERISTICS
V
P
= 3 V; f = 1 kHz; R
L
= 32
; T
amb
= 25
C; unless otherwise specified
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).
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
Supply
Supply voltage
V
P
1,6
-
6,0
V
Total quiescent current
I
tot
-
3,2
4
mA
Bridge-tied load application (BTL); see Fig.4
Output power; note 1
V
P
= 3,0 V; d
tot
= 10%
P
o
-
140
-
mW
V
P
= 4,5 V; d
tot
= 10% (R
L
= 64
)
P
o
-
150
-
mW
Voltage gain
G
v
-
32
-
dB
Noise output voltage (r.m.s. value)
R
S
= 5 k
; f = 1 kHz
V
no(rms)
-
140
-
V
R
S
= 0
; f = 500 kHz; B = 5 kHz
V
no(rms)
-
tbf
-
V
D.C. output offset voltage (at R
S
= 5 k
)
|
V|
-
-
70
mV
Input impedance (at R
S
=
)
|Z
i
|
1
-
-
M
Input bias current
I
i
-
40
-
nA
Stereo application; see Fig.5
Output power; note 1
V
P
= 3,0 V; d
tot
= 10%
P
o
-
35
-
mW
V
P
= 4,5 V; d
tot
= 10%
P
o
-
75
-
mW
Voltage gain
G
v
24.5
26
27.5
dB
Noise output voltage (r.m.s. value)
R
S
= 5 k
; f = 1 kHz
V
no(rms)
-
100
-
V
R
S
= 0
; f = 500 kHz; B = 5 kHz
V
no(rms)
-
tbf
-
V
Channel separation
R
S
= 0
; f = 1 kHz
30
40
-
dB
Input impedance (at R
S
=
)
|Z
i
|
2
-
-
M
Input bias current
I
i
-
20
-
nA
June 1989
5
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
C.
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