tda1905, Ham- CB Radio, Karty katalogowe
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TDA1905
5W AUDIO AMPLIFIER WITH MUTING
DESCRIPTION
The TDA1905 is a monolithic integrated circuit in
POWERDIP package, intended for use as low
frequency power amplifier in a wide range of appli-
cations in radio and TV sets:
– muting facility
– protection against chip over temperature
– very low noise
– high supply voltage rejection
– low ”switch-on” noise
– voltage range 4V to 30V
The TDA 1905 is assembled in a new plastic pack-
age, the POWERDIP, that offers the same assembly
ease, space and cost saving of a normal dual in-line
package but with a power dissipation of up to 6W and
a thermal resistance of 15
°
C/W (junction to pins).
Powerdip
(8 + 8)
ORDERING NUMBER
: TDA 1905
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
s
Supply voltage
30
V
I
o
Output peak current (non repetitive)
3
A
I
o
Output peak current (repetitive)
2.5
A
V
i
Input voltage
0 to + V
s
V
V
i
Differential input voltage
±
7
V
V
11
Muting thresold voltage
V
s
V
P
tot
Power dissipation at T
amb
=80
°
C
1
W
T
case
=60
°
C
6
W
T
stg
,T
j
Storage and junction temperature
-40 to 150
°
C
APPLICATION CIRCUIT
March 1993
1/14
TDA1905
PIN CONNECTION
(top view)
SCHEMATIC DIAGRAM
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th-j-case
Thermal resistance junction-pins
max
15
°
C/W
R
th-j-amb
Thermal resistance junction-ambient
max
70
°
C/W
2/14
TDA1905
TEST CIRCUITS:
WITHOUT MUTING
WITH MUTING FUNCTION
3/14
TDA1905
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit, T
amb
=25
°
C, R
th
(heatsink) = 20
°
C/W,
unless otherwisw specified)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
V
s
Supply voltage
4
30
V
V
o
Quiescent output voltage
V
s
=4V
V
s
= 14V
V
s
= 30V
1.6
6.7
14.4
2.1
7.2
15.5
2.5
7.8
16.8
V
I
d
Quiescent drain current
V
s
=4V
V
s
= 14V
V
s
= 30V
15
17
21
mA
35
V
CE sat
Output stage saturation
voltage
I
C
=1A
0.5
V
I
C
=2A
1
P
o
Output power
d = 10%
V
s
=9V
V
s
= 14V
V
s
= 18V
V
s
= 24V
f = 1KHz
R
L
=4
W
(*)
2.2
5
5
4.5
2.5
5.5
5.5
5.3
W
R
L
=8
W
W
R
L
=16
W
d
Harmonic distortion
f = 1KHz
V
s
=9V R
L
=4
W
P
o
= 50 mW to 1.5W
V
s
= 14V R
L
=4
0.1
W
P
o
=50mWto3W
V
s
= 18V R
L
=8
0.1
%
W
P
o
=50mWto3W
V
s
= 24V R
L
=16
W
P
o
=50mWto3W
0.1
0.1
V
i
Input sensitivity
f = 1KHz
V
s
=9V
V
s
= 14V
V
s
= 18V
V
s
= 24V
W
R
L
=4
P
o
= 2.5W
P
o
= 5.5W
P
o
= 5.5W
P
o
= 5.3W
37
49
73
100
W
R
L
=8
mV
W
R
L
=16
W
V
i
Input saturation
voltage (rms)
V
s
=9V
V
s
= 14V
V
s
= 18V
V
s
= 24V
0.8
1.3
1.8
2.4
V
R
i
Input resistance (pin 8)
f = 1KHz
60
100
K
W
I
d
Drain current
f = 1KHz
V
s
=9V
V
s
= 14V
V
s
= 18V
V
s
= 24V
W
R
L
=4
P
o
= 2.5W
P
o
= 5.5W
P
o
= 5.5W
P
o
= 5.3W
380
550
410
295
W
R
L
=8
mA
W
R
L
=16
W
f = 1KHz
V
s
=9V
V
s
= 14V
V
s
= 18V
V
s
= 24V
W
R
L
=4
P
o
= 2.5W
P
o
= 5.5W
P
o
= 5.5W
P
o
= 5.3W
73
71
74
75
h
Efficiency
W
R
L
=8
%
W
R
L
=16
W
(*) With an external resistor of 100
W
between pin 3 and +V
s
.
4/14
R
L
=4
R
L
=4
R
L
=4
R
L
=4
TDA1905
ELECTRICAL CHARACTERISTICS
(continued)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
BW
Small signal
bandwidth (-3dB)
V
s
= 14V
R
L
=4
W
P
o
= 1W
40 to 40,000
Hz
G
v
Voltage gain (open loop)
V
s
= 14V
f = 1KHz
75
dB
G
v
Voltage gain (closed loop) V
s
= 14V
f = 1KHz
W
P
o
=1W
39.5
40
40.5
dB
e
N
Total input noise
W
R
g
=1K
1.2
1.3
1.5
W
(
°
)
m
V
R
g
= 10K
W
4.0
W
R
g
=1K
2.0
2.0
2.2
W
(
°°
)
m
V
R
g
= 10K
W
6.0
S/N
Signal to noise ratio
V
s
= 14V
P
o
= 5.5W
R
L
=4
R
g
= 10K
W
90
92
R
g
=0
(
°
)
dB
W
R
g
= 10K
W
R
g
=0
(
°°
)
87
87
dB
SVR
Supply voltage rejection
V
s
= 18V R
L
=8
W
f
ripple
= 100 Hz
Rg = 10K
W
40
50
dB
V
ripple
= 0.5V
rms
T
sd
Thermal shut-down
case temperatura
(*)
P
tot
= 2.5W
115
°
C
MUTING FUNCTION
VT
OFF
Muting-off threshold
voltage (pin 4)
1.9
4.7
V
VT
ON
Muting-on threshold
voltage (pin 4)
0
1.3
V
6.2
V
s
R
5
Input-resistance (pin 5)
Muting off
80
200
K
W
Muting on
10
30
W
R
4
Input resistance (pin 4)
150
K
W
A
T
Muting attenuation
R
g
+R
1
= 10K
W
50
60
dB
) Filter with noise bandwidth: 22 Hz to 22 KHz.
(*) See fig. 30 and fig. 31
5/14
R
L
=4
R
g
=50
R
g
=50
Note:
(
°
) Weighting filter = curve A.
(
° °
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