1

FEATURES

APPLICATIONS

DESCRIPTION

1 F

m

SD

MuteControl

PVCCL

TPA3125D2

SIMPLIFIED APPLICATIONCIRCUIT

PVCCR

VCLAMP

GAIN1

BYPASS

1 F

m

1 F

m

0.22 F

m

AGND

LeftChannel

RightChannel

10Vto26V

10Vto26V

4-StepGainControl

ShutdownControl

LIN

RIN

BSR

BSL

PGNDR

PGNDL

0.22 F

m

33 H

m

33 H

m

470 F

m

0.22 F

m

1 F

m

470 F

m

GAIN0

AVCC

MUTE

ROUT

LOUT

S0267-02

0.22 F

m

TPA3125D2

10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

• Flat Panel Televisions

234

• 10-W/Ch (stereo SE) into an 8-Ω Load From a

24-V Supply

• CRT TVs

• 20-W/Ch (mono BTL) into an 8-Ω Load from a

24-V Supply

• Powered Speakers

• Operates From 10 V to 26 V

• Operates From +24 V LCD Backlight Supply

The TPA3125D2 is a 10-W (per channel), efficient,

• Efficient Class-D Operation Eliminates Need

class-D audio power amplifier for driving stereo

for Heat Sinks

speakers in a single-ended configuration; or, a mono

• Four Selectable, Fixed-Gain Settings

speaker in a bridge-tied-load configuration. The

• Single-Ended Analog Inputs

TPA3125D2 can drive stereo speakers as low as 4

Ω.

The efficiency of the TPA3125D2 eliminates the need

• Thermal and Short-Circuit Protection With

for an external heat sink when playing music. The

Auto Recovery

gain of the amplifier is controlled by two gain select

• 20-Pin DIP Package

pins. The gain selections are 20, 26, 32, and 36 dB.

• Advanced Power-Off Pop Reduction

The patented start-up and shutdown sequences

minimize pop noise in the speakers without additional

circuitry.

The

thru-hole

package

allows

placement

on

single-sided printed circuit boards.

1

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.

2

DLP is a registered trademark of Texas Instruments.

3

System Two, Audio Precision are trademarks of Audio Precision, Inc.

4

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.