SGS-THOMSON TDA1905 Technical data
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5W AUDIO AMPLIFIER WITH MUTING
DESCRIPTION
The TDA1905 is a monolithicintegrated circuit in
POWERDIP package, intended for use as low
frequencypower amplifierin a wide rangeof applications in radio and TV sets:
– muting facility
– protectionagainst chip over temperature
– very low noise
– high supply voltage rejection
– low ”switch-on” noise
– voltagerange 4V to 30V
TheTDA 1905is assembled in a new plasticpack-
age,thePOWERDIP,thatoffersthesameassembly
ease,spaceandcostsavingof a normaldualin-line
packagebutwithapowerdissipationofupto6Wand
a thermalresistance of 15°C/W (junctionto pins).
TDA1905
Powerdip
(8 + 8)
ORDERING NUMBER : TDA1905
ABSOLUTE MAXIMUMRATINGS
Symbol Parameter Value Unit
V
s
I
o
I
o
V
V
V
11
P
tot
T
stg,Tj
Supply voltage 30 V
Output peak current (non repetitive) 3 A
Output peak current (repetitive) 2.5 A
Input voltage 0 to + V
i
Differential input voltage
i
Muting thresold voltage V
Power dissipation at T
Storage and junction temperature -40 to 150
=80°C
amb
=60°C6W
T
case
s
± 7
s
1W
APPLICATION CIRCUIT
V
V
V
°C
March 1993
1/14
TDA1905
PIN CONNECTION (top view)
SCHEMATIC DIAGRAM
THERMALDATA
Symbol Parameter Value Unit
2/14
R
th-j-case
R
th-j-amb
Thermal resistance junction-pins max 15
Thermal resistance junction-ambient max 70
°C/W
°C/W
TEST CIRCUITS:
WITHOUTMUTING
TDA1905
WITH MUTING FUNCTION
3/14
TDA1905
ELECTRICAL CHARACTERISTICS (Referto the test circuit, T
=25°C, Rth(heatsink)= 20 °C/W,
amb
unless otherwiswspecified)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Supply voltage 4 30 V
s
Quiescent output voltage Vs=4V
o
I
Quiescent drain current Vs=4V
d
Output stage saturation
V
= 14V
s
V
= 30V
s
V
= 14V
s
= 30V
V
s
IC=1A
1.6
6.7
14.4
2.1
7.2
15.5
15
17
21 35
0.5
voltage
Output power d = 10%
o
d Harmonic distortion
=2A
I
C
f = 1KHz
V
V
V
V
=9V
s
= 14V
s
= 18V
s
= 24V
s
R
R
R
R
f = 1KHz
V
=9V RL=4Ω
s
P
= 50 mW to 1.5W
V
V
V
s
s
s
o
= 14V RL=4Ω
P
=50mWto3W
o
= 18V RL=8Ω
=50mWto3W
P
o
= 24V RL=16Ω
P
=50mWto3W
o
=4Ω(*)
L
=4Ω
L
=8Ω
L
=16Ω
L
2.2
5
5
4.5
1
2.5
5.5
5.5
5.3
0.1
0.1
0.1
0.1
2.5
7.8
16.8
V
V
V
CE sat
P
V
mA
V
W
%
Input sensitivity f = 1KHz
V
i
V
Input saturation
i
voltage (rms)
R
Input resistance (pin 8) f = 1KHz 60 100
i
I
Drain current f = 1KHz
d
V
=9V
s
V
= 14V
s
V
= 18V
s
V
= 24V
s
Vs=9V
V
= 14V
s
V
= 18V
s
V
= 24V
s
V
=9V
s
V
= 14V
s
V
= 18V
s
V
= 24V
s
f = 1KHz
V
=9V
Efficiency
η
(*) With an external resistor of 100Ω between pin 3 and +Vs.
V
V
V
s
= 14V
s
= 18V
s
= 24V
s
R
R
R
R
R
R
R
R
R
R
R
R
L
L
L
L
L
L
L
L
L
L
L
L
=4Ω
=4Ω
=8Ω
=16Ω
=4Ω
=4Ω
=8Ω
=16Ω
=4Ω
=4Ω
=8Ω
=16Ω
P
P
P
P
P
P
P
P
P
P
P
P
o
o
o
o
o
o
o
o
o
o
o
o
= 2.5W
= 5.5W
= 5.5W
= 5.3W
= 2.5W
= 5.5W
= 5.5W
= 5.3W
= 2.5W
= 5.5W
= 5.5W
= 5.3W
0.8
1.3
1.8
2.4
37
49
73
100
380
550
410
295
73
71
74
75
mV
V
KΩ
mA
%
4/14
TDA1905
ELECTRICALCHARACTERISTICS (continued)
Symbol Parameter Testconditions Min. Typ. Max. Unit
BW Small signal
bandwidth (-3dB)
G
G
e
Voltagegain (open loop) Vs= 14V
v
Voltagegain (closed loop) Vs= 14V
v
Totalinput noise
N
S/N Signal to noiseratio
SVR Supply voltage rejection V
T
Thermal shut-down
sd
case temperatura
(*)
= 14V
V
s
=4Ω P
R
L
f = 1KHz
R
=4Ω
f = 1KHz
V
= 14V
s
= 5.5W
P
o
R
=4Ω
L
= 18V RL=8Ω
s
f
= 100 Hz Rg = 10KΩ
ripple
V
= 0.5V
ripple
L
=1W
P
o
R
=50Ω
g
R
=1KΩ
g
R
= 10KΩ
g
=50Ω
R
g
R
=1KΩ
g
R
= 10KΩ
g
R
= 10KΩ
g
R
=0 (°)
g
= 10KΩ
R
g
R
=0 (°°)
g
rms
P
tot
= 1W 40 to 40,000 Hz
o
75 dB
39.5 40 40.5 dB
1.2
(°)
1.3
1.5 4.0
2.0
(°°)
2.0
2.2 6.0
90
92 dB
87
87
40 50 dB
= 2.5W 115
µV
µV
dB
°C
MUTING FUNCTION
VT
VT
R
R
A
Note:
(°) Weighting filter= curve A.
(° °) Filterwith noise bandwidth: 22 Hz to 22 KHz.
(*) See fig. 30 and fig. 31
Muting-off threshold
OFF
voltage (pin 4)
Muting-on threshold
ON
voltage (pin 4)
Input-resistance (pin 5) Muting off 80 200
5
Input resistance (pin 4) 150
4
Muting attenuation
T
R
g+R1
1.9 4.7 V
0 1.3 V
6.2 V
Muting on 10 30
= 10KΩ
50 60 dB
s
KΩ
Ω
KΩ
5/14
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