PA3138

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

6 of 6

www.unisonic.com.tw

QW-R107-074 .a



TYPICAL APPLICATION CIRCUIT

+INL

-INL

OUTL

GND

Mute

CN

+INR

-INR

OUTR

UVP

GND

CP

UTC PA3138

LDO

Right

Input

-

+

C3

C3

R1

R1

C2

R3

R3

R2

R2

C1

C1

Right

Output

1µF

1µF

10µF

System Supply

1µF

3.3-V Supply

R12

R11

Left output

R2

C1

R3

R3

C2

R2

R1

R1

C3

C3

Left

Input

-

+

C1

Charge Pump

Bias and UVP

Circuitry

Headphone

Driver

Headphone

Driver

-

+

-

+

R1=15kΩ, R2=30kΩ, R3=43kΩ, C1=47pF, C2=180pF

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.