TS4962

Application information

Doc ID 10968 Rev 8

35/44

In the case where the distance between the TS4962 output and the speaker terminals is

high, it is possible to observe low frequency EMI issues due to the fact that the typical

operating frequency is 250 kHz. In this configuration, we recommend using an output filter

(as represented in Figure 1 on page 6). It should be placed as close as possible to the

device.

4.11

Several examples with summed inputs

4.11.1

Example 1: dual differential inputs

Figure 64.

Typical application schematic with dual differential inputs

R1

R1

Cs

1u

GND

GND

Vcc

SPEAKER

Standby

R2

R2

E1+

E1-

E2-

E2+

In-

Stdby

In+

Out-

Out+

Vcc

1

4

3

7

8

6

5

GND

Internal

Bias

PWM

Output

Bridge

H

Oscillator

150k

150k

+

-

A

V

1

Out

+

Out

-

–

E

1

+

E

1

-

–

-------------------------------

300

R

1

----------

==

A

V

2

Out

+

Out

-

–

E

2

+

E

2

-

–

-------------------------------

300

R

2

----------

==

0.5V

V

CC

R

1

×

R

2

300

V

IC1

R

2

V

IC2

+

×

R

1

×

()

×

+

×

300

R

1

R

2

+

() 2R

1

×

R

2

×

+

×

--------------------------------------------------------------------------------------------------------------------------------

V

CC

0.8V

–

≤≤

V

IC

1

E

1

+

E

1

-

+

2

------------------------

=

and V

IC

2

E

2

+

E

2

-

+

2

------------------------

=