PA3312

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 10

www.unisonic.com.tw

QW-R107-055.A

TYPICAL APPLICATION CIRCUIT

R

MUX

Volume

Control

PC-

Beep

RHPIN

RLINEIN

RIN

PC-BEEP

ROUT+

ROUT-

Volume

Control

L

MUX

SE/BEL

HP/LINE

LHPIN

LLINEIN

LIN

Volume

Control

Gain/

MUX

Control

Depop

Circuitry

GAIN0

GAIN1

Volume

Control

100KΩ

100KΩ

330µF

1KΩ

Power

Manag

ement

330µF

0.1µF

0.1µF

See Note A

To System

Control

1, 12,

13, 24

22

11

19

18

4

LOUT+

LOUT- 9

GND

SHUT

DOWN

BYPASS

16

21

1KΩ

0.47µF

10

5

6

15

17

2, 3

14

8

23

20

0.47µF

A. A 0.1-µF ceramic capacitor should be placed as close as possible to the IC. For filtering

lower frequency noise signals, a larger electrolytic capacitor of 10 µF or greater should be

placed near the audio power amplifier.

0.47µF

0.47µF

0.47µF

0.47µF

0.47µF

0.47µF

Left

Line

Input

Signal

PC-

BEEP

Input

Signal

Left

Head−

phone

Input

Signal

Right

Line

Input

Signal

Right

Head−

phone

Input

Signal

Typical PA3312 Application Circuit Using Single-Ended Inputs and Input MUX