TDA7296 データシートの表示（PDF） - STMicroelectronics

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TDA7296

70V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

STMicroelectronics 

TDA7296

3 APPLICATION SUGGESTIONS

(see Test and Application Circuits of the Fig. 2)

The recommended values of the external components are those shown on the application circuit of Figure

2. 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

Decrease Input

Impedance

Impedance

R2

R3 (*)

680Ω

22k

Closed Loop Gain

Set to 30db (**)

Decrease of Gain

Increase of Gain

Increase of Gain

Decrease of Gain

R4

22k

St-by Time Constant

Larger St-by

Smaller St-by ON/OFF

ON/OFF Time

Time; Pop Noise

R5

10k

Mute Time Constant

Larger Mute

Smaller Mute

ON/OFF Time

ON/OFF Time

C1

0.47µF

Input DC Decoupling

Higher Low Frequency

Cutoff

C2

22µF

Feedback DC

Decoupling

Higher Low Frequency

Cutoff

C3

10µF

Mute Time Constant

Larger Mute

Smaller Mute ON/OFF

ON/OFF Time

Time

C4

10µF

St-by Time Constant

Larger St-by

Smaller St-by ON/OFF

ON/OFF Time

Time; Pop Noise

C5

22µF

Bootstrapping

Signal Degradation at

Low Frequency

C6, C8

1000µF

Supply Voltage Bypass

Danger of Oscillation

C7, C9

0.1µF

(*) R1 = R3 for pop optimization

(**) Closed Loop Gain has to be ≥ 24dB

Supply Voltage Bypass

Danger of Oscillation

5/15

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