TDA7293 ST Microelectronics, TDA7293 Datasheet - Page 5

• Manufacturer Part Number: TDA7293
• Description: 120V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
• Manufacturer: ST Microelectronics

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
(***) Multiplay 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
BOOTSTRAPPING
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 ST-BY
LARGER ST-BY
LARGER THAN
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
TDA7293
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