MOSA

MS6865

3 Stereo inputs / 2W PA output with Volume Control

REV 1.0

15

www.mosanalog.com

APPLICATION INFORMATION

A base application circuit

SDA

SCL

2.4~5.5V

Power Amplifier Supply

1uF

1uF

0.1uF

MS6865

MCU

20

19

15

6

14

7

11

10

4.7uF

CAP

2.4~5.5V

Supply

1uF

2

LIN1

18

RIN1

3

10uF

OUTL-

OUTL+

13

12

100uF

1k

R

L

8Ω

OUTR-

OUTR+

8

9

100uF

1k

R

L

8Ω

Headphone Jack

1

10uF

100k

V

DD

MCU

HP_sense

100k

1uF

LIN2

17

LIN3

16

RIN2

4

RIN3

5

L channel

R channel

Output mode operation -- SE mode and BTL mode

The output has two modes, SE mode and BTL mode. The mode is selected by I2C code via MCU.

In BTL mode, the outputs of A1(B1) and A2(B2) are then used to drive the speakers(4Ω/8Ω).

OUTR+

OUTR-

OUTL+

OUTL-

-1

-1

-1

-1

SCL

SDA

Interface

R

L

4Ω / 8Ω

R

L

4Ω / 8Ω

A1

A2

B1

B2