TDA7294(1996) Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
TDA7294 Datasheet PDF : 16 Pages
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TDA7294
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
SUGGESTE D
SMALLER THAN
SUGGESTED
R1 (*)
R2
R3 (*)
22k
680Ω
22k
INPUT RESISTANCE INCREASE INPUT DECREASE INPUT
IMPRDANCE
IMPEDANCE
CLOSED LOOP GAIN DECREASE OF GAIN INCREASE OF GAIN
SET TO 30dB (**)
INCREASE OF GAIN DECREASE OF GAIN
R4
22k
ST-BY TIME
LARGER ST-BY
SMALLER ST-BY
CONSTANT
ON/OFF TIME
ON/OFF TIME;
POP NOISE
R5
10k
MUTE TIME
LARGER MUTE
SMALLER MUTE
CONSTANT
ON/OFF TIME
ON/OFF TIME
C1
0.47µF
INPUT DC
DECOUPLING
HIGHER LOW
FREQUENCY
CUTOFF
C2
C3
C4
C5
C6, C8
C7, C9
22µF
10µF
10µF
22µF
1000µF
0.1µF
FEEDBACK DC
DECOUPLING
MUTE TIME
CONSTANT
ST-BY TIME
CONSTANT
BOOT STRAPPING
SUPPLY VOLTAGE
BYPASS
SUPPLY VOLTAGE
BYPASS
LARGER MUTE
ON/OFF TIME
LARGER ST-BY
ON/OFF TIME
HIGHER LOW
FREQUENCY
CUTOFF
SMALLER MUTE
ON/OFF TIME
SMALLER ST-BY
ON/OFF TIME;
POP NOISE
SIGNAL
DEGRADATION AT
LOW FREQUENCY
DANGER OF
OSCILLATION
DANGER OF
OSCILLATION
(*) R1 = R3 FOR POP OPTIMIZATION
(**) CLOSED LOOP GAIN HAS TO BE ≥ 24dB
5/16
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