TDA7495SA_07 Datasheet, PDF (5/15 Pages) STMicroelectronics – 11 W + 11 W amplifier with DC volume control

TDA7495SA
3
Applications
Applications
3.1
Circuit diagram and components
Figure 2. Application circuit
+V_S
C1
1000µF
PW_GND
11
1
INR
C2 470nF
30K
VAROUT_R
2
V_S
13
VOLUME
+
-
OP AMP
S_GND
8
5
INL
C3 470nF
SVR 7
C4 470µF
VOLUME
30K
MUTE/STBY
PROTECTIONS
+
-
OP AMP
3
VOLUME
4
VAROUT_L
C5
100nF
R1 300K
TP1
VOL
P1
50K
LOG
C9
0.1µF
PW_GND
15
C8 1000µF
14
PW_GND
OUTR
S1 STBY
+5V
9
10
R2 10K
S_GND
C7
1µF
12
C6 1000µF
+5V
S2 MUTE
OUTL
PW_GND
STBY MUTE
Mode
L
L
Play
+5V
L
H
Mute
H
L
D96AU493D
Standby
H
H
Standby
The recommended values of the external components are those shown on the application
circuit of Figure 2. Table 6 below indicates how the performance changes when component
values different to the recommended are used.
Table 6. Application suggestions
Symbol
Suggested
value
Purpose
Larger than
suggestion
Smaller than
suggestion
R1
300 kΩ Volume control circuit
Larger volume regulation Smaller volume
time
regulation time
R2
10 kΩ
Mute time constant
Larger mute on/off time Smaller mute on/off time
P1
50 kΩ
Volume control
C1
1000 µF
C2, C3 470 nF
Supply voltage decoupling
Input AC coupling
Lower low-frequency
cutoff
Danger of oscillation
Higher low-frequency
cutoff
C4
470 µF Ripple rejection
C5
100 nF
Volume control time
constant
Better SVR
Worse SVR
Larger volume regulation Smaller volume
time
regulation time
C6, C8 1000 µF Output AC coupling
Lower low-frequency
cutoff
Higher low-frequency
cutoff
C7
1 µF
Mute time constant
Larger mute on/off time Smaller mute on/off time
C9
100 nF Supply voltage decoupling
Danger of oscillation
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