Copyright

© ANPEC Electronics Corp.

Rev. A.4 - Aug., 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.

2.8W Mono Class D Audio Power Amplifier with AGC

APA2011/2011A

Features

General Description

Applications

–I

–I

– I

at 1% THD+N

– 1.3W, at V

– 0.6W, at V

– 2.0W, at V

– 1.0W, at V

at 10% THD+N

– 1.6W, at V

– 0.8W, at V

– 2.8W, at V

– 2.4W, at V

– 1.2W, at V

Maximum 15dB Control (2:1 Compression Ratio)

mum 15dB Control (Gain Decreasing)

WLCSP1.5x1.5-9 Bump, TDFN3x3-8

(RoHS Compliant)

Simplified Application Circuit

The APA2011/2011A is a mono, filter-free Class-D audio

amplifier available in WLCSP1.5x1.5-9 or TDFN3x3-8

package.

The default gains without the external input resistor is

27dB. Besides, the gain can be low down by external

input resistance. APA2011 provides an Dynamic-Range-

Control (DRC) function, and this function can low down

the dynamic range for large input signal. APA2011 can

provide maximun 15dB gain control. APA2011A can pro-

vide maximum 15dB gain decrease for non-clipping

function, and this function can avoid output signal clipping.

High PSRR and differential architecture provide increased

immunity to noise and RF rectification. In addition to these

features, a fast start-up time and small package size

make the APA2011/2011A an ideal choice for portable

devices.

The APA2011/2011A is capable of driving 1.6W at 5V or

0.8W at 3.6V into 8

Ω. It is also capable of driving 4Ω. The

APA2011/2011A is designed with a Class-D architecture

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 architec-

ture eliminates the output filter, reduces the external com-

ponent count, board area, and system costs, and simpli-

fies the design.

Moreover, the APA2011/2011A provides thermal and short

circuit protection.

APA2011/2011A

Audio Input

Signals

Audio

Speaker

INP

OUTP

INN

OUTN