TDA7499 Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
TDA7499 Datasheet PDF : 9 Pages
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TDA7499
Figure 6. Test and Application Circuit (Stereo Configuration)
+VS
R2
C3
R1
Q1
MUTE/
ST-BY 5
IN (L) 7
SW1
C1
ST-BY DZ
R4
R3
GND 9
C4
C5
+VS
3
+
4 OUT (L)
-
R5
R7
8 IN- (L)
C8
R6
RL (L)
SW2
MUTE
10 IN- (R)
R9
R8
C2
-
2 OUT (R)
IN (R) 11
+
R10
t(s) D94AU087B
1
6
-VS
C9
C7
C6
RL (R)
roduc 4 APPLICATION SUGGESTIONS
P (Demo Board Schematic)
te The recommended values of the external components are those shown the demoboard schematic different val-
le ues can be used, the following table can help the designer.
so Table 6.
Ob COMPONENT
SUGGESTION
VALUE
PURPOSE
) - R1
10KΩ
Mute Circuit
ct(s R2
du R3
ro R4
P R5, R8
te R6, R9
le R7, R10
soC1, C2
Ob C3
15KΩ
18KΩ
15KΩ
18KΩ
560KΩ
4.7Ω
1µF
1µF
Mute Circuit
Mute Circuit
Mute Circuit
Closed Loop Gain
Setting (*)
Frequency Stability
Input DC Decoupling
St-By/Mute Time
LARGER THAN
SMALLER THAN
RECOMMENDED VALUE RECOMMENDED VALUE
Increase of Dz Biasing
Current
Vpin #5 Shifted Downward Vpin #5 Shifted Upward
Vpin #5 Shifted Upward
Vpin #5 Shifted Downward
Vpin #5 Shifted Upward
Vpin #5 Shifted Downward
Increase of Gain
Decrease of Gain
Danger of Oscillations
Danger of Oscillations
Higher low frequency cutoff
Larger On/Off Time
Smaller On/Off Time
Constant
C4, C6
1000µF Supply Voltage Bypass
Danger of Oscillations
C5, C7
C8, C9
0.1µF
0.1µF
Supply Voltage Bypass
Frequency Stability
Danger of Oscillations
Dz
5.1V
Mute Circuit
(*) Closed loop gain has to be ≥25dB
6/9
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