Obsolete Product(s) - Obsolete Product(s)
PWR
MUTE/STBY
PROTECTIONS
IN 1
1
87910
14
SVR
MUTE
D99AU1013
13 +V
CC
GND
15
R5
10K
C9
1µF
C10
470µF
C8
470µF
C4 470nF
SGN GND
S3S2
STAND-
BY
+5V
+5V
C2
0.1µF
GND
OUT
PGND
C1
1000µF
Figure 1:
Test and Application Circuit.
Figure 2:
P.C.B. and component layout
(Pin IN1 of relevant device must be connected to IN3 of TDA7494 Board position).
TDA7494S
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Obsolete Product(s) - Obsolete Product(s)
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
SUGGESTION
VALUE
PURPOSE
LARGER THAN
SUGGESTION
SMALLER THAN
SUGGESTION
R5 10K Mute time constant Larger mute on/off time Smaller mute on/off time
C1 1000µF Supply voltage bypass Danger of oscillation
C2 100nF Supply voltage bypass Danger of oscillation
C5 470nF Input DC decoupling
Lower low frequency
cutoff
Higher low frequency
cutoff
C8 470µF Ripple Rejection Better SVR Worse SVR
C9 1µF Mute time constant Larger mute on/off time Smaller mute on/off time
C10 470µF Output DC decoupling
Lower low frequency
cutoff
Higher low frequency
cutoff
TYPICAL CHARACTERISTICS:
Refer to the Application Circuit of Fig.1 V
S
= 21V; R
L
= 8
; f = 1KHz;
R
S
= 8
; Tamb = 2C; R
S
= 50
; unless otherwise specified
5 10 15 20 25 30 Vs(V)
D96AU517
0
2
4
6
8
10
12
14
P
OUT
(W)
d=10%
d=1%
Figure 3:
Output Power vs Supply Voltage
02468P
OUT
(W)
0.01
0.1
1
d
(%)
V
S
=28V
R
L
=8
f=15KHz
f=1KHz
D96AU518
Figure 4:
Distortion vs Output Power
TDA7494S
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Obsolete Product(s) - Obsolete Product(s)
11 13 15 17 19 V
S
(V)
0
1
2
3
4
5
6
7
P
OUT
(W)
D96AU519
R
L
=4
d=1%
d=10%
Figure 5:
Output Power vs Supply Voltage
0246P
OUT
(W)
0.01
0.1
1
d
(%)
V
S
=21V
R
L
=4
f=15KHz
f=1KHz
D96AU520
Figure 6:
Distortion vs Output Power
20
100
1K
f(Hz)
0.01
0.1
1
d
(%)
D96AU521
P
OUT
=1W
R
L
=8
Figure 7:
Distortion vs Frequency
20
100
1K
f(Hz)
0.01
0.1
1
d
(%)
D96AU522
P
OUT
=1W
R
L
=4
Figure 8:
Distortion vs Frequency
10 14 18 22 26 30 V
S
(V)
16
18
20
22
24
26
28
I
Q
(mA)
D96AU523
Figure 9:
Quiescent Current vs Supply Voltage
10 14 18 22 26 30 V
S
(V)
5
7
9
11
13
15
V
DDC
(V)
D96AU524
Figure 10:
Quiescent Output Voltage vs Supply
Voltage
TDA7494S
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TDA7494S

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
Audio Amplifiers Video switch chip
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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