TPA731

700mW MONO LOW VOLTAGE AUDIO POWER AMPLIFIER

WITH DIFFERENTIAL INPUTS

SLOS315B − JUNE 2000 − REVISED OCTOBER 2002

1

POST OFFICE BOX 655303

2.5 V − 5.5 V

Mode . . . 1.5 nA

− SOIC

− PowerPAD

 MSOP

description

The TPA731 is a bridge-tied load (BTL) audio power amplifier developed especially for low-voltage applications

where internal speakers are required. Operating with a 3.3-V supply, the TPA731 can deliver 250-mW of

continuous power into a BTL 8-

Ω load at less than 0.6% THD+N throughout voice band frequencies. Although

this device is characterized out to 20 kHz, its operation is optimized for narrower 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. This device

features a shutdown mode for power-sensitive applications with a supply current of 1.5 nA during shutdown.

The TPA731 is available in an 8-pin SOIC surface-mount package and the surface-mount PowerPAD

 MSOP,

which reduces board space by 50% and height by 40%.

Audio

Input

Bias

Control

VDD

700 mW

6

5

7

VO+

VDD

1

2

4

BYPASS

IN −

VDD/2

CI

RI

CS

CB

RF

SHUTDOWN

VO−8

GND

From System Control

3

IN+

−

+

−

+

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright

 2002, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

1

2

3

4

8

7

6

5

SHUTDOWN

BYPASS

IN+

IN−

GND

D OR DGN PACKAGE

(TOP VIEW)

PowerPAD is a trademark of Texas Instruments.