MOSA

MS6863

Dual 2W Power Amplifiers with Stereo Headphone

REV 1

11

www.mosanalog.com

Pop noise free example

Use extra function of pin7 and control timing.

V

INA

V

INB

MS6863

R

L

8Ω

100uF

1k

100uF

1k

Headphone Jack

R

L

8Ω

HP-IN

16

18

5

3

15

20

1uF

20k

R

IN

20K

R

F

20K

R

F

6

-INA

-INB

-OUTB

+OUTB

-OUTA

+OUTA

1uF

V

DD

GND

VDD

2,19

4,17

1

SD

MCU

4.7uF

13

14

8

+INA

BYPASS

+INB

R

IN

1uF

20k

100k

V

DD

SDPR

7

Fig.2

A pop noise free application circuit.

SDPR (Pin7)

Shutdown

Delay time

0.1s

Fig.3

A control timing for pop noise free

Pop noise free in shutdown control

According to the control timing figure3, it can reduce pop noise efficiently during the shutdown control.

The timing can be applied to BTL and SE mode. The delay time is decided by the value of the bypass capacitor.