TDA7294SV ST Microelectronics, TDA7294SV Datasheet - Page 5
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TDA7294SV
Manufacturer Part Number
TDA7294SV
Description
100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
Manufacturer
ST Microelectronics
Datasheet
1.TDA7294SV.pdf
(13 pages)
APPLICATION SUGGESTIONS (see Test and Application Circuits of the Fig. 1)
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.
(*) R1 = R3 for pop optimization
(**) Closed Loop Gain has to be
(***) Multiply this value for the number of modular part connected
Slave function: pin 4 (Ref to pin 8 -V
COMPONENTS
C6, C8
C7, C9
R1 (*)
R3 (*)
R2
R4
R5
C1
C2
C3
C4
C5
-V
-V
S
S
-V
+3V
+1V
S
SUGGESTED VALUE
UNDEFINED
26dB
22 FXN (***)
MASTER
SLAVE
1000 F
0.47 F
0.1 F
680
22 F
10 F
10 F
22k
22k
22k
10k
D98AU821
S
)
CLOSED LOOP GAIN
INPUT RESISTANCE
SUPPLY VOLTAGE
SUPPLY VOLTAGE
BOOTSTR APPING
SET TO 30dB (**)
FEEDBACK DC
DECOUPLING
DECOUPLING
ST-BY TIME
ST-BY TIME
CONSTANT
MUTE TIME
CONSTANT
MUTE TIME
CONSTANT
CONSTANT
PURPOSE
INPUT DC
BYPASS
BYPASS
Note:
If in the application, the speakers are connected
via long wires, it is a good rule to add between
the output and GND, a Boucherot Cell, in order to
avoid dangerous spurious oscillations when the
speakers terminal are shorted.
The suggested Boucherot Resistor is 3.9 /2W
and the capacitor is 1 F.
DECREASE OF GAIN INCREASE OF GAIN
INCREASE OF GAIN DECREASE OF GAIN
INCREASE INPUT
LARGER THAN
LARGER ST-BY
LARGER ST-BY
LARGER MUTE
LARGER MUTE
ON/OFF TIME
ON/OFF TIME
ON/OFF TIME
ON/OFF TIME
SUGGESTED
IMPEDANCE
DEGRADATION AT
LOW FREQUENCY
DECREASE INPUT
SMALLER THAN
SMALLER ST-BY
SMALLER ST-BY
SMALLER MUTE
SMALLER MUTE
ON/OFF TIME;
ON/OFF TIME;
OSCILLATION
ON/OFF TIME
HIGHER LOW
HIGHER LOW
ON/OFF TIME
SUGGESTED
FREQUENCY
FREQUENCY
IMPEDANCE
DANGER OF
POP NOISE
POP NOISE
CUTOFF
CUTOFF
SIGNAL
TDA7294S
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