1.1W Mono Low-Voltage Audio Power Amplifier

Copyright

© ANPEC Electronics Corp.

Rev. A.5 - Oct., 2005

APA0710/0711

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.

The APA0710 is a bridged-tied load (BTL) or singled-

ended (SE) audio power amplifier developed especially

for low-voltage applications where internal speakers

and external earphone operation are required. The

APA0711 is a only BTL audio power amplifier developed

especially for low-voltage applications where internal

speakers are required. Operating with a 5V supply,

the APA0710/1 can deliver 1.1W of continuous power

into a BTL 8

Ω load at 10% THD+N throughout voice

band frequencies. Although this device is characterized

out to 20kHz,its operation is optimized for narrow band

applications such as wireless communications. The

BTL configuration eliminates the need for external

coupling capacitors on the output in most applications,

which is particularly important for small battery-powered

equipment. A unique feature of the APA0710 is that it

allows the amplifier to switch from BTL to SE on the

fly when an earphone drive is required. This eliminates

complicated mechanical switching or auxiliary devices

just to drive the external load. This device features a

shutdown mode for power-sensitive applications with

special depop circuitry to eliminate speaker noise when

exiting shutdown mode. The APA0710/1 are available

in an 8-pin SOP and 8-pin MSOP-P with enhanced

thermal pad.

APA0711 Compatible with TPA751

Modes Operation (for APA0710 only)

– I

DD

=5V ,BTL mode

– I

DD

=3.3V ,BTL mode

– I

Ω

THD+N=0.15%

Ω

THD+N=0.15%

at 1% THD+N

Ω

Ω

at 10% THD+N

Ω

Ω

Over Current Protection Circuitry

– 8 pin MSOP-P (with enhanced thermal pad)

power package available

– SOP-8 package

Features

General Description

Applications