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TDA7293 Datasheet(Fiches technique) 5 Page - STMicroelectronics

Numéro de pièce TDA7293
Description  120V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
Télécharger  13 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
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 5 page
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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.
COMPONENTS
SUGGESTED VALUE
PURPOSE
LARGER THAN
SUGGESTED
SMALLER THAN
SUGGESTED
R1 (*)
22k
INPUT RESISTANCE
INCREASE INPUT
IMPEDANCE
DECREASE INPUT
IMPEDANCE
R2
680
CLOSED LOOP GAIN
SET TO 30dB (**)
DECREASE OF GAIN
INCREASE OF GAIN
R3 (*)
22k
INCREASE OF GAIN
DECREASE OF GAIN
R4
22k
ST-BY TIME
CONSTANT
LARGER ST-BY
ON/OFF TIME
SMALLER ST-BY
ON/OFF TIME;
POP NOISE
R5
10k
MUTE TIME
CONSTANT
LARGER MUTE
ON/OFF TIME
SMALLER MUTE
ON/OFF TIME
C1
0.47
µF
INPUT DC
DECOUPLING
HIGHER LOW
FREQUENCY
CUTOFF
C2
22
µF
FEEDBACK DC
DECOUPLING
HIGHER LOW
FREQUENCY
CUTOFF
C3
10
µF
MUTE TIME
CONSTANT
LARGER MUTE
ON/OFF TIME
SMALLER MUTE
ON/OFF TIME
C4
10
µF
ST-BY TIME
CONSTANT
LARGER ST-BY
ON/OFF TIME
SMALLER ST-BY
ON/OFF TIME;
POP NOISE
C5
22
µFXN (***)
BOOTSTRAPPING
SIGNAL
DEGRADATION AT
LOW FREQUENCY
C6, C8
1000
µF
SUPPLY VOLTAGE
BYPASS
C7, C9
0.1
µF
SUPPLY VOLTAGE
BYPASS
DANGER OF
OSCILLATION
(*) R1 = R3 for pop optimization
(**) Closed Loop Gain has to be
≥ 26dB
(***) Multiplay this value for the number of modular part connected
MASTER
UNDEFINED
SLAVE
-V
S +3V
-VS +1V
-VS
D98AU821
Slave function: pin 4 (Ref to pin 8 -VS)
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
Ω/2W
and the capacitor is 1
µF.
TDA7293
5/13




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Numéro de composants électroniques

Numéro de pièceDescription des composantsHtml ViewFabricant
TDA7294100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY 1 2 3 4 5 MoreSTMicroelectronics
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TDA729670V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY 1 2 3 4 5 MoreSTMicroelectronics
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