Copyright

© ANPEC Electronics Corp.

Rev. A.5 - Feb., 2010

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.

2.4W Stereo Fully Differential Audio Power Amplifier With Stereo Class AB

Cap-free Headphone Driver and LDO

APA2058

Features

General Description

Applications

Excellent RF Rectification Immunity

Phone Driver

Audio Codec (3.3V)

Driver

– TQFN5x5-32A

(RoHS Compliant)

Simplified Application Circuit

The APA2058 is a stereo fully differential audio power

amplifier with stereo Class-AB cap-free headphone driver

and LDO available in a TQFN5X5-32A pins package.

The built-in gain setting at power amplifier can minimize

the external component counts. For the flexible application,

the gain can be set to 4-steps, 10, 12, 15.6, and 21.6dB by

gain control pins (GAIN0 and GAIN1). The power amplifier’s

fully differential architecture provides high PSRR, in-

creased immunity to noise and RF rectification.

The APA2058 power amplifiers are capable of driving

2.4W at V

drivers can provide 180mW at HV

headphones, and the LDO has a maximum 200mA(3.3V)

driver current for audio codec. The APA2058 provides ther-

mal and over-current protections.

The cap-free headphone driver eliminates the DC block-

ing capacitors at outputs, save the PCB space. The inte-

gration of fully differential power amplifier, cap-free head-

quirement and it can lower the total BOM costs.

-100

+0

-90

-80

-70

-60

-50

-40

-30

-20

-10

20

20k

100

1k

10k

Frequency (Hz)

V

R

A

V

C

Input Short

AMP Mode

Audio

Codec

Stereo

Speakers

Stereo

Headphone

LDO (Low Drop

-Out Regulator)