SGS-THOMSON TDA1904 Technical data
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HIGHOUTPUTCURRENTCAPABILITY
PROTECTION AGAINST CHIP OVERTEM-
PERATURE
LOWNOISE
HIGHSUPPLY VOLTAGEREJECTION
SUPPLY VOLTAGERANGE: 4V TO 20V
DESCRIPTION
The TDA 1904 is a monolithicintegrated circuit in
POWERDIP package intended for use as low-frequency power amplifier in wide range of applications in portableradio and TV sets.
TDA1904
4WAUDIOAMPLIFIER
Powerdip
(8 + 8)
ORDERING NUMBER
: TDA1904
ABSOLUTEMAXIMUM RATINGS
Symbol Parameter Value Unit
V
S
I
O
I
O
P
tot
T
stg,Tj
Supply voltage 20 V
Peak output current (non repetitive) 2.5 A
Peak output current (repetitive) 2 A
Totalpower dissipation at T
Storage and junction temperature -40 to 150
at T
amb
pins
=80°C
=60°C
1W
6W
TEST AND APPLICATIONCIRCUIT
°C
March 1993
(*) R4 is necessaryonly for V
<6V.
s
1/10
TDA1904
PIN CONNECTION (top view)
SCHEMATICDIAGRAM
THERMALDATA
Symbol Parameter Value Unit
2/10
R
th-j-case
R
th-j-amb
Thermal resistance junction-pins max 15
Thermal resistance junction-ambient max 70
C/W
°
°C/W
TDA1904
ELECTRICALCHARACTERISTICS (Refer to the test circuit, T
=25°C, Rth(heatsink)=
amb
20 °C/W, unless otherwiswspecified)
Symbol Parameter Testconditions Min. Typ. Max. Unit
V
V
I
P
d Harmonic distortion
V
R
η
BW Small signal bandwidth(-3 dB) V
G
Supply voltage 4 20 V
s
Quiescent output voltage
o
Quiescent drain current Vs=9V
d
Output power d = 10%
o
V
V
V
V
V
V
V
=4V
s
= 14V
s
= 14V
s
=9V
s
= 14V
s
= 12V
s
=6V
s
f = 1 KHz
R
=4
Ω
L
1.8
4
3.1
0.7
2.1
7.2
8
10
2
4.5 W
f = 1 KHz
V
=9V RL=4
s
= 50 mW to 1.2W
P
o
Input saturation voltage
i
(rms)
Input resistance (pin 8) f = 1 KHz 55 150
i
Efficiency
Voltagegain (open loop)
v
Vs=9V
V
= 14V
s
f = 1 KHz
V
=9V RL=4
s
V
= 14V RL=4Ω Po= 4.5W
s
= 14V
s
= 14V
V
s
Ω
R
L
f = 1 KHz
Po=2W
=4
Ω
Ω
0.8
1.3
0.1 0.3 %
70
65
40 to 40,000 Hz
75 dB
15
18
V
mA
V
KΩ
%
G
e
Voltagegain (closed loop) Vs= 14V
v
Total input noise Rg=50
N
SVR Supply voltage rejection V
T
Thermal shut-down case
sd
temperature
Note: (°) Weightingfilter = curve A.
(°°) Filterwith noise bendwidth: 22Hz to 22 KHz.
=4Ω
R
f = 1 KHz
Ω
R
=10KΩ
g
R
=50
Ω
g
R
=10KΩ
g
= 12V
s
f
= 100 Hz
ripple
V
= 0.5 Vrms
ripple
P
= 2W 120 ÉC
tot
P
R
L
=1W
o
g
(°)
(°°)
=10KΩ
39.5 40 40.5 dB
1.2
24
2
3
40 50 dB
µV
µV
3/10
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