TDA7495SA

Applications

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3

Applications

3.1

Circuit diagram and components

Figure 2.

Application circuit

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

circuit of Figure 2. Table 6 below indicates how the performance changes when component

values different to the recommended are used.

Table 6.

Application suggestions

Symbol

Suggested

value

Purpose

Larger than

suggestion

Smaller than

suggestion

R1

300 k

Ω

Volume control circuit

Larger volume regulation

time

Smaller volume

regulation time

R2

10 k

Ω

Mute time constant

Larger mute on/off time

Smaller mute on/off time

P1

50 k

Ω

Volume control

C1

1000 µF

Supply voltage decoupling

Danger of oscillation

C2, C3

470 nF

Input AC coupling

Lower low-frequency

cutoff

Higher low-frequency

cutoff

C4

470 µF

Ripple rejection

Better SVR

Worse SVR

C5

100 nF

Volume control time

constant

Larger volume regulation

time

Smaller volume

regulation time

C6, C8

1000 µF

Output AC coupling

Lower low-frequency

cutoff

Higher low-frequency

cutoff

C7

1 µF

Mute time constant

Larger mute on/off time

Smaller mute on/off time

C9

100 nF

Supply voltage decoupling

Danger of oscillation

VOLUME

OP AMP

+

-

MUTE/STBY

PROTECTIONS

1

C2 470nF

INR

30K

VOLUME

OP AMP

+

-

30K

C8 1000

µF

C6 1000

µF

C7

1

µF

R2 10K

5

C3 470nF

INL

8

S_GND

2

14

9

10

12

34

R1 300K

C5

100nF

VOLUME

OUTR

S1 STBY

S2 MUTE

OUTL

11

C4 470

µF

SVR

7

D96AU493D

VAROUT_R

PW_GND

15

13

C9

0.1

µF

C1

1000

µF

PW_GND

VOL

P1

50K

LOG

+5V

TP1

PW_GND

PW_GND

S_GND

+5V

+5V

VAROUT_L

STBY

MUTE

Mode

LL

Play

LH

Mute

H

L

Standby

H

H

Standby