TPA4861

1-W AUDIO POWER AMPLIFIER

SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000

1

POST OFFICE BOX 655303

Mode)

(56 dB at 1 kHz)

description

The TPA4861 is a bridge-tied load (BTL) audio power amplifier capable of delivering 1 W of continuous average

power into an 8-

Ω load at 0.2% THD+N from a 5-V power supply in voiceband frequencies (f < 5 kHz). A BTL

configuration eliminates the need for external coupling capacitors on the output in most applications. Gain is

externally configured by means of two resistors and does not require compensation for settings of 2 to 20.

Features of the amplifier are a shutdown function for power-sensitive applications as well as internal thermal

and short-circuit protection. The TPA4861 works seamlessly with TI’s TPA4860 in stereo applications. The

amplifier is available in an 8-pin SOIC surface-mount package that reduces board space and facilitates

automated assembly.

Audio

Input

Bias

Control

VDD

1 W

6

5

8

7

VO1

VO2

VDD

1

2

3

4

IN +

IN –

BYPASS

SHUTDOWN

VDD/2

CI

RI

RF

CS

CB

–

+

–

+

GND

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

© 2000, 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 PACKAGE

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