TDA1905
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit, T
amb
= 25
°C,
R
th
(heatsink) = 20
°C/W,
unless otherwisw specified)
Symbol
V
s
V
o
Parameter
Supply voltage
Quiescent output voltage
V
s
= 4V
V
s
= 14V
V
s
= 30V
V
s
= 4V
V
s
= 14V
V
s
= 30V
I
C
= 1A
I
C
= 2A
P
o
Output power
d = 10%
V
s
= 9V
V
s
= 14V
V
s
= 18V
V
s
= 24V
f = 1KHz
R
L
= 4Ω (*)
R
L
= 4Ω
R
L
= 8Ω
R
L
= 16Ω
2.2
5
5
4.5
Test conditions
Min.
4
1.6
6.7
14.4
2.1
7.2
15.5
15
17
21
0.5
V
1
2.5
5.5
5.5
5.3
Typ.
Max.
30
2.5
7.8
16.8
Unit
V
V
I
d
Quiescent drain current
mA
35
V
CE sat
Output stage saturation
voltage
W
d
Harmonic distortion
f = 1KHz
V
s
= 9V
R
L
= 4Ω
P
o
= 50 mW to 1.5W
V
s
= 14V R
L
= 4Ω
P
o
= 50 mW to 3W
V
s
= 18V R
L
= 8Ω
P
o
= 50 mW to 3W
V
s
= 24V R
L
= 16Ω
P
o
= 50 mW to 3W
f = 1KHz
V
s
= 9V
V
s
= 14V
V
s
= 18V
V
s
= 24V
V
s
V
s
V
s
V
s
= 9V
= 14V
= 18V
= 24V
R
L
=
R
L
=
R
L
=
R
L
=
4Ω
4Ω
8Ω
16Ω
P
o
P
o
P
o
P
o
= 2.5W
= 5.5W
= 5.5W
= 5.3W
0.8
1.3
1.8
2.4
60
R
L
=
R
L
=
R
L
=
R
L
=
R
L
=
R
L
=
R
L
=
R
L
=
4Ω
4Ω
8Ω
16Ω
4Ω
4Ω
8Ω
16Ω
0.1
0.1
0.1
0.1
%
V
i
Input sensitivity
37
49
73
100
mV
V
i
Input saturation
voltage (rms)
V
R
i
I
d
Input resistance (pin 8)
Drain current
f = 1KHz
f = 1KHz
V
s
= 9V
V
s
= 14V
V
s
= 18V
V
s
= 24V
f = 1KHz
V
s
= 9V
V
s
= 14V
V
s
= 18V
V
s
= 24V
100
KΩ
P
o
P
o
P
o
P
o
= 2.5W
= 5.5W
= 5.5W
= 5.3W
380
550
410
295
mA
η
Efficiency
P
o
P
o
P
o
P
o
= 2.5W
= 5.5W
= 5.5W
= 5.3W
73
71
74
75
%
(*) With an external resistor of 100Ω between pin 3 and +V
s
.
4/14
STMICROELECTRONICS [ STMICROELECTRONICS ]
