Copyright  ANPEC Electronics Corp.

Rev. A.5 - July., 2002

APA2020A

www.anpec.com.tw

1

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.

Stereo 2-W Audio Power Amplifier

Features

- 1.8 W/Ch (typ) into a 4

Ω Load

- 1.2 W/Ch (typ) into a 8

Ω Load

(SE) Modes Operation

SOP , TSSOP-P

Applications

General Description

Ordering Information

APA2020A

Handling Code

Temp. Range

Package Code

Package Code

K : SOP

R : TSSOP-P *

Temp. Range

I: - 40 to 85 C

Handling Code

TU : Tube

TR : Tape & Reel

TY : Tray

°

* TSSOP-P is a standard TSSOP package with a thermal pad exposure on the bottom of the package.

The APA2020A is a stereo bridge-tied audio power

amplifier in various 24-pin power packages , includ-

ing SOP , TSSOP-P. When connecting to a 5V volt-

age supply , the APA2020A is capable of delivering

1.8W/1.2W of continuous RMS power per channel

into 4

Ω/8Ω loads with less than 1% THD+N ,

respectively. The APA2020A simplifies design and

frees up board space for other features .

Computer

The APA2020A also served well in low-voltage

applications , which provides 800-mW per channel

into 4

Ω loads with a 3.3V supply voltage . Both of the

depop circuitry and the thermal shutdown protection

circuitry are integrated in the APA2020A , that reduces

pops and clicks noise during power up and when

using the shutdown or mute modes and protects the

chip from being destroyed by over-temperature

failure.

To simplify the audio system design in notebook

computer applications , the APA2020A combines a

stereo bridge-tied loads (BTL) mode for speaker drive

and a stereo single-end (SE) mode for headphone

drive into a single chip , where both modes are easily

switched by the SE/BTL input control pin signal . For

power sensitive applications , the APA2020A also

features a shutdown function which keeps the supply

current only 0.5 µA (typ) .