TDA7494S Datasheet, PDF (5/12 Pages) STMicroelectronics – 10W AMPLIFIER

TDA7494S
APPLICATION SUGGESTIONS
The recommended values of the external components are those shown on the application circuit of fig-
ure 1. Different values can be used; the following table can help the designer.
COMPONENT
R5
C1
C2
C5
C8
C9
C10
SUGGESTION
VALUE
10KΩ
1000µF
100nF
PURPOSE
Mute time constant
Supply voltage bypass
Supply voltage bypass
470nF
Input DC decoupling
470µF
1µF
Ripple Rejection
Mute time constant
470µF
Output DC decoupling
LARGER THAN
SUGGESTION
Larger mute on/off time
Lower low frequency
cutoff
Better SVR
Larger mute on/off time
Lower low frequency
cutoff
SMALLER THAN
SUGGESTION
Smaller mute on/off time
Danger of oscillation
Danger of oscillation
Higher low frequency
cutoff
Worse SVR
Smaller mute on/off time
Higher low frequency
cutoff
TYPICAL CHARACTERISTICS: Refer to the Application Circuit of Fig.1 VS = 21V; RL = 8Ω; f = 1KHz;
RS = 8Ω; Tamb = 25°C; RS = 50Ω; unless otherwise specified
Figure 3: Output Power vs Supply Voltage
Figure 4: Distortion vs Output Power
P_OUT
(W)
14
12
10
8
6
4
2
0
5
D96AU517
d=10%
d=1%
10 15 20 25 30 Vs(V)
d
(%)
D96AU518
V_S=28V
R_L=8Ω
1
f=15KHz
f=1KHz
0.1
0.01
0
2
4
6
8 P_OUT(W)
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