SGS-THOMSON TDA1908 Technical data
!
TDA1908
8W AUDIO AMPLIFIER
DESCRIPTION
The TDA1908 is a monolithic integrated circuit in 12 lead quad in-line plastic package intended for low frequency power applications. The mounting is compatible with the old types TBA800, TBA810S, TCA830S and TCA940N. Its main features are:
±flexibility in use with a max output curent of 3A and an operating supply voltage range of 4V to 30V;
±protection against chip overtemperature;
±soft limiting in saturation conditions;
±low ºswitch-onº noise;
±low number of external components;
±high supply voltage rejection;
±very low noise.
ABSOLUTE MAXIMUM RATINGS
Findip
ORDERING NUMBER : TDA1908
Symbol |
Parameter |
Value |
Unit |
Vs |
Supply voltage |
30 |
V |
Io |
Output peak current (non repetitive) |
3.5 |
A |
Io |
Output peak current (repetitive) |
3 |
A |
Ptot |
Power dissipation: at Tamb = 80°C |
1 |
W |
|
at Tamb = 90°C |
5 |
W |
Tstg, Tj |
Storage and junction temperature |
-40 to 150 |
°C |
APPLICATION CIRCUIT
March 1993 |
1/12 |
TDA1908
PIN CONNECTION (top view)
SCHEMATIC DIAGRAM
2/12
TDA1908
TEST CIRCUIT
* See fig. 12
THERMAL DATA
Symbol |
Parameter |
|
Value |
Unit |
Rth j-tab |
Thermal resistance junction-tab |
max |
12 |
°C/W |
Rth j-amb |
Thermal resistance junction-ambient |
max |
(°) 70 |
°C/W |
(°) Obtained with tabs soltered to printed circuit board with min copper area.
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Tamb = 25 °C, Rth (heatsink)= 8 °C/W, unless otherwise specified)
Symbol |
Parameter |
Test conditions |
Min. |
Typ. |
Max. |
Unit |
||
Vs |
Supply voltage |
|
|
|
4 |
|
30 |
V |
Vo |
Quiescent output voltage |
Vs = 4V |
|
|
1.6 |
2.1 |
2.5 |
|
|
|
Vs = 18V |
|
|
8.2 |
9.2 |
10.2 |
V |
|
|
Vs = 30V |
|
|
14.4 |
15.5 |
16.8 |
|
Id |
Quiescent drain current |
Vs = 4V |
|
|
|
15 |
|
|
|
|
Vs = 18V |
|
|
|
17.5 |
|
mA |
|
|
Vs = 30V |
|
|
|
21 |
35 |
|
VCEsat |
Output stage saturation voltage |
IC = 1A |
|
|
|
0.5 |
|
|
|
(each output transistor) |
IC = 2.5A |
|
|
|
1.3 |
|
V |
|
|
|
|
|
|
|
||
Po |
Output power |
d = 10% |
f = 1KHz |
|
|
|
|
|
|
|
Vs = |
9V |
RL = 4Ω |
|
2.5 |
|
|
|
|
Vs = 14V |
RL = 4Ω |
|
5.5 |
|
W |
|
|
|
Vs = 18V |
RL = 4Ω |
7 |
9 |
|
||
|
|
|
|
|||||
|
|
Vs = 22V |
Ω |
6.5 |
8 |
|
|
|
|
|
RL = 8 |
4.5 |
5.3 |
|
|
||
|
|
Vs = 24V |
Ω |
|
|
|||
|
|
RL = 16 |
|
|
|
|
||
3/12
TDA1908
ELECTRICAL CHARACTERISTICS (continued)
Symbol |
Parameter |
Test conditions |
|
d |
Harmonic distorsion |
f = 1KHz |
RL = 4Ω |
|
|
Vs = 9V |
|
|
|
Po = 50 mW to 1.5 W |
|
|
|
Vs = 18V |
RL = 4Ω |
|
|
Po = 50 mW to 4W |
|
|
|
Vs = 24V |
RL = 16Ω |
Po = 50 mW to 3W
Vi |
Input sensivity |
Vs = 9V |
|
|
Vs = 14V |
|
|
Vs = 18V |
|
|
Vs = 22V |
|
|
Vs = 24V |
Vi |
Input saturation voltage (rms) |
Vs = 9V |
|
|
Vs = 14V |
|
|
Vs = 18V |
|
|
Vs = 24V |
RL = |
4Ω |
Po = 2.5W |
RL = |
4Ω |
Po = 5.5W |
RL = |
4Ω |
Po = 9W |
RL = |
8Ω |
Po = 8W |
|
Ω |
Po = 5.3W |
RL = 16 |
|
|
Ri Input resistence (pin 8)
Is Drain current
ηEfficiency
BW |
Small signal bandwitdth (-3 dB) |
Gv |
Voltage gain (open loop) |
Gv |
Voltage gain (closed loop) |
eN |
Total input noise |
S/N |
Signal to noise ratio |
SVR |
Supply voltage rejection |
|
Tsd |
Termal shut-down junction |
(*) |
|
temperature |
|
|
|
f = 1 KHz |
|
|
|
f = 1 KHz |
RL = |
4Ω |
|
Vs = 14V |
Po = 5.5W |
||
Vs = 18V |
RL = |
4Ω |
Po = 9W |
Vs = 22V |
RL = |
8Ω |
Po = 8W |
Vs = 24V |
RL = 16Ω |
Po = 5.3W |
|
Vs = 18V |
|
f = 1 KHz |
|
RL = 4Ω |
|
Po = 9W |
|
Vs = 18V |
RL = 4Ω |
Po = 1W |
|
f = 1 KHz |
|
|
|
Vs = 18V f = 1 KHz
(°)
(°°)
Vs = 18V Po = 9W RL = 4Ω
RL = 4Ω Po = 1W
Rg = 50Ω Rg = 1KΩ Rg = 10KΩ
Rg = 50Ω Rg = 1KΩ Rg = 10KΩ
Rg = 10KΩ Rg = 0
Rg = 10KΩ Rg = 0
(°)
(°°)
Vs = 18V RL = 4Ω
fripple = 100 Hz Rg = 10KΩ
Note :
(°) |
Weighting filter = curve A. |
(° °) |
Filter with noise bandwidth: 22 Hz to 22 KHz. |
Min. Typ. Max.
0.1
0.1
0.1
37
52
64
90
110
0.8
1.3
1.8
2.4
60100
570
730
500
310
72
40 to 40 000
75
39.5 40 40.5
1.2
1.3
1.54.0
2.0
2.0
2.26.0
92
94
88
90
40 50
145
Unit
%
mV
V
KΩ
mA
%
Hz
dB
dB
μV
μV
dB
dB
dB
ÉC
4/12
Loading...