TDA7496 参数 Datasheet PDF下载

TDA7496SA

APPLICATION SUGGESTIONS

The recommended values of the external components are those shown on the application circuit of figure 1.

Different values can be used, the following table can help the designer.

COMPONENT

R1

R2

P1

C1

C2

C3

C4

C5

C6

C7

C8

C9

SUGGESTION

VALUE

300K

10K

50K

1000µF

470nF

470nF

470µF

100nF

1000µF

1µF

1000µF

100nF

PURPOSE

Volume Control Circuit

Mute time constant

Volume Control Circuit

Supply voltage bypass

Input DC decoupling

Input DC decoupling

Ripple rejection

Volume control time

constant

Output DC decoupling

Mute time constant

Output DC decoupling

Supply voltage bypass

Danger of oscillation

Lower low frequency cutoff Higher low frequency cutoff

Lower low frequency cutoff Higher low frequency cutoff

Better SVR

Larger volume regulation

time

Worse SVR

Smaller volume regulation

time

LARGER THAN

SUGGESTION

Larger volume regulation

time

Larger mute on/off time

SMALLER THAN

SUGGESTION

Smaller volume regulation

time

Smaller mute on/off time

Lower low frequency cutoff Higher low frequency cutoff

Larger mute on/off time

Smaller mute on/off time

Lower low frequency cutoff Higher low frequency cutoff

Danger of oscillation

Figure 1. Application Circui

+V

S

C1

1000µF

VAROUT_R

PW_GND

2

11

1

C2 470nF

30K

VOLUME

+

-

OP AMP

S1 STBY

S_GND

8

MUTE/STBY

PROTECTIONS

VOLUME

INL

C3 470nF

5

30K

+

-

OP AMP

SVR

C4 470µF

VOLUME

7

3

4

VAROUT_L

R1 300K

TP1

VOL

P1

50K

LOG

+5V

12

C6 1000µF

9

10

C7

1µF

OUTL

PW_GND

R2 10K

+5V

13

15

V

S

PW_GND

C9

0.1µF

INR

14

C8 1000µF

PW_GND

OUTR

S_GND

+5V

S2 MUTE

C5

100nF

D96AU493D

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