TDA7495 Datasheet, PDF (5/12 Pages) STMicroelectronics – 11W+11W AMPLIFIER WITH DC VOLUME CONTROL

TDA7495
APPLICATION SUGGESTIONS
The recommended values of the external components are those shown on the application circuit of fig-
ure 1a. Different values can be used, the following table can help the designer.
COMPONENT
R1
R2
P1
C1
C2
C3
C4
C5
C6
C7
C8
C9
SUGGESTION
VALUE
300K
10K
50K
1000µF
470nF
470nF
470µF
100nF
1000µF
1µF
1000µF
100nF
PURPOSE
LARGER THAN
SUGGESTION
Volume control circuit
Larger volume regulation
time
Mute time constant Larger mute on/off time
Volume control circuit
Supply voltage
bypass
Input DC decoupling Lower low frequency cutoff
Input DC decoupling Lower low frequency cutoff
Ripple rejection
Better SVR
Volume control time Larger volume regulation
costant
time
Output DC decoupling Lower low frequency cutoff
Mute time costant Larger mute on/off time
Output DC decoupling Lower low frequency cutoff
Supply voltage
bypass
SMALLER THAN
SUGGESTION
Smaller volume regulation
time
Smaller mute on/off time
Danger of oscillation
Higher low frequency cutoff
Higher low frequency cutoff
Worse SVR
Smaller volume regulation
time
Higher low frequency cutoff
Smaller mute on/off time
Higher low frequency cutoff
Danger of oscillation
TYPICAL CHARACTERISTICS:
Refer to the application circuit of fig.1A Tamb = 25°C; VS = 20V; RL = 8Ω; F = 1KHz; RS = 50Ω; unless
otherwise specified.
Figure 2: Output Power vs Supply Voltage
P_OUT
(W)
16
14
12
10
8
6
4
2
0
11
D97AU559
R_L=8Ω
d=10%
d=1%
15 19 23 27 31 V_S(V)
Figure 3: Distortion vs Output Power
d
D97AU560
(%)
V_S=28V
R_L=8Ω
1
f=15KHz
f=1KHz
0.1
0.01
0
2
4
6
8 P_OUT(W)
5/12