PA3427

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 7

www.unisonic.com.tw

QW-R502-357.b



TYPICAL APPLICATION CIRCUIT

GND

SHUTDOWN 22

1, 12, 13, 24

Right

MUX

RLINEIN

RHPIN

23

20

1µF

1µF

Right Linein Negative

Differential Input

Right Hpin Negative

Differential Input

1µF

Right Hpin/Linein Positive

Differential Input

8

1µF

PC-BEEP Input Signal

PC-Beep

14

BYPASS

11

2.2µF

GAIN0

GAIN1

SE/BTL

HP/LINE

2

3

15

17

0.1µF

LLINEIN

LHPIN

5

6

10

1µF

1µF

Left Linein Negative

Differential Input

Left Hpin Negative

Differential Input

Left Hpin/Linein Positive

Differential Input

1µF

220µF

1K

1K

220µF

1µF

10µF

100K

100K

Gain/

MUX

Control

Depop

Circuitry

Power

Management

PC-Beep

+

-

+

-

+

-

+

-

Left

MUX

Application Circuit Using Differential Inputs

Note: 1µF ceramic capacitor must be placed much closely to the IC. For filtering lower frequency noise signals, a

larger electrolytic capacitor of 10µF or greater should be placed as close as possible to the audio power

amplifier.