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PDF TDA1905 Data sheet ( Hoja de datos )
| Número de pieza | TDA1905 | |
| Descripción | 5W AUDIO AMPLIFIER WITH MUTING | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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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 dissipationof up to6W and
a thermal resistance of 15°C/W (junction to pins).
ABSOLUTE MAXIMUM RATINGS
Symbol
Vs
Io
Io
Vi
Vi
V11
Ptot
Tstg, Tj
Parameter
Supply voltage
Output peak current (non repetitive)
Output peak current (repetitive)
Input voltage
Differential input voltage
Muting thresold voltage
Power dissipation at Tamb = 80°C
Tcase = 60°C
Storage and junction temperature
APPLICATION CIRCUIT
Powerdip
(8 + 8)
ORDERING NUMBER : TDA 1905
Value
30
3
2.5
0 to + Vs
±7
Vs
1
6
-40 to 150
Unit
V
A
A
V
V
V
W
W
°C
March 1993
1/14
1 page  
TDA1905
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test conditions
BW Small signal
bandwidth (-3dB)
Vs = 14V RL = 4Ω Po = 1W
Gv Voltage gain (open loop) Vs = 14V
f = 1KHz
Gv Voltage gain (closed loop) Vs = 14V RL = 4Ω
f = 1KHz Po = 1W
eN Total input noise
Rg = 50Ω
Rg = 1KΩ
Rg = 10KΩ
Rg = 50Ω
Rg = 1KΩ
Rg = 10KΩ
S/N Signal to noise ratio
Vs = 14V
Po = 5.5W
RL = 4Ω
Rg = 10KΩ
Rg = 0
Rg = 10KΩ
Rg = 0
(°)
(°°)
(°)
(°°)
SVR Supply voltage rejection
Tsd
Thermal shut-down
case temperatura
(*)
Vs = 18V RL = 8Ω
fripple = 100 Hz
Rg = 10KΩ
Vripple = 0.5Vrms
Ptot = 2.5W
Min.
Typ.
Max.
40 to 40,000
75
39.5 40 40.5
1.2
1.3
1.5 4.0
2.0
2.0
2.2 6.0
90
92
87
87
40 50
115
Unit
Hz
dB
dB
µV
µV
dB
dB
dB
°C
MUTING FUNCTION
VTOFF Muting-off threshold
voltage (pin 4)
VTON Muting-on threshold
voltage (pin 4)
R5 Input-resistance (pin 5)
Muting off
Muting on
R4 Input resistance (pin 4)
AT Muting attenuation
Rg + R1 = 10KΩ
Note:
(°) Weighting filter = curve A.
(° °) Filter with noise bandwidth: 22 Hz to 22 KHz.
(*) See fig. 30 and fig. 31
1.9 4.7 V
0 1.3 V
6.2 Vs
80 200
KΩ
10 30 Ω
150 KΩ
50 60
dB
5/14
5 Page 
TDA1905
APPLICATION SUGGESTION
The recommended values of the external components are those shown on the application circuit of fig. 21.
When the supply voltage Vs is less than 10V, a 100Ω resistor must be connected between pin 2 and pin 3
in order to obtain the maximum output power.
Different values can be used. The following table can help the designer.
Component
Raccom.
value
Purpose
Rg + R1
10KΩ Input signal imped.
for muting operation
R2 10KΩ
Feedback resistors
R3 100Ω
Larger than
recommended value
Smaller than
Allowed range
recommended value
Min. Max.
Increase of the
attenuation in muting-on
condition. Decrease of
the input sensitivity.
Decrease of the attenu-
ation in muting on
condition.
Increase of gain.
Decrease of gain.
Increase quiescent
current.
9 R3
Decrease of gain.
Increase of gain.
1KΩ
R4 1KΩ Frequency stability Danger of oscillation at
high frequencies with
inductive loads.
R5 100Ω Increase of the output
swing with low supply
voltage.
47 330
P1 20KΩ Volume potentiometer Increase of the
switch-on noise.
Decrease of the input
impedance and of the
input level.
10KΩ 100KΩ
C1 Input DC
C2 0.22µF decoupling.
C3
Higher cost
lower noise.
Higher low
frequency cutoff.
Higher noise.
C4
2.2µF Inverting input DC
Increase of the switch- Higher low frequency 0.1µF
decoupling.
on noise.
cutoff.
C5 0.1µF Supply voltage
bypass.
Danger of
oscillations.
C6
10µF Ripple rejection
Increase of SVR
increase of the
switch-on time
Degradation of SVR
2.2µF 100µF
C7 47µF Bootstrap.
Increase of the
distortion at low
frequency.
10µF 100µF
C8 0.22µF Frequency stability.
Danger of oscillation.
C9 1000µF Output DC decoupling.
Higher low frequency
cutoff.
11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet TDA1905.PDF ] | |
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