Copyright

© ANPEC Electronics Corp.

Rev. A.3 - Oct., 2013

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.

3W Mono Class-D Audio Power Amplifier

With Auto-Recovering Short-Circuit Protection

APA2012

The APA2012 is a mono, filter-free Class-D audio ampli-

fier available in a WLCSP package. The gain can be set-

ting by external input resistance. High PSRR and differ-

ential architecture provide increased immunity to noise

and RF rectification. In addition to these features, a fast

startup time and small package size make the APA2012

an ideal choice for both cellular handsets and PDAs.

The APA2012 is capable of driving 1.3 W at 5 V or 600 mW

at 3.6 V into 8

Ω. The APA2012 is also capable of driving

4

Ω. The APA2012 is designed with a Class-D architec-

ture and operating with highly efficiency compared with

Class-AB amplifier. It's suitable for power sensitive

application, such as battery powered devices. The filter-

free architecture eliminates the output filter, reduces the

external component count, board area, and system costs,

and simplifies the design.

The APA2012 provides thermal and over circuit protection.

Features

General Description

Applications

– I

– I

– I

at 1% THD+N

– 1.40W, at V

– 0.74W, at V

– 2.51W, at V

– 1.32W, at V

at 10% THD+N

– 1.8W, at V

– 0.91W, at V

– 3.2W, at V

– 1.62W, at V

Simplified Application Circuit

Bias

Circuitry

OUTP

OUTN

INN

APA2012

INP

SHUTDOWN

VOP

VON

Input

Signal