TPA3003D2

SLOS406A − FEBRUARY 2003 − REVISED MARCH 2003

3W STEREO CLASSD AUDIO POWER AMPLIFIER

WITH DC VOLUME CONTROL

1

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FEATURES

D 3-W/Ch Into an 8-Ω Load From 12-V Supply

D Efficient, Class-D Operation Eliminates

Heatsinks and Reduces Power Supply

Requirements

D 32-Step DC Volume Control From −40 dB

to 36 dB

D Third Generation Modulation Techniques

− Replaces Large LC Filter With Small

Low-Cost Ferrite Bead Filter

D Thermal and Short-Circuit Protection

APPLICATIONS

D LCD Monitors and TVs

D Powered Speakers

DESCRIPTION

The TPA3003D2 is a 3-W (per channel) efficient,

Class-D audio amplifier for driving bridged-tied stereo

speakers. The TPA3003D2 can drive stereo speakers

as low as 8

Ω. The high efficiency of the TPA3003D2

eliminates the need for external heatsinks when playing

music.

Stereo speaker volume is controlled with a dc voltage

applied to the volume control terminal offering a range

of gain from –40 dB to 36 dB.

Cs

Cs

10 nF

Cbs

Cs

Cs

10 nF

Cbs

PVCC

PVCC

Cs

Cs

10 nF

Cbs

Cs

Cs

10 nF

Cbs

PVCC

PVCC

220 pF

Cosc

Rosc

Ccpl

100 nF

Cvdd

Ccpr

Crinp

Crinn

Clinn

Clinp

LINP

LINN

RINN

RINP

SYSTEM CONTROL

VOLUME

TPA3003D2

VCLAMPR

SD

V2P5

RINP

LINN

LINP

AVDDREF

VREF

AGND

AGND

VOLUME

REFGND

MUTE

NC

NC

NC

AVDD

AGND

COSC

ROSC

AVCC

VCLAMPL

RINN

AVDD

AVCC

C2p5

FADE

10

µF

10

µF

0.1

µF

0.1

µF

1

µF

1

µF

1

µF

1

µF

1

µF

0.1

µF

0.1

µF

10

µF

10

µF

1

µF

120 k

Ω

1

µF

Cs

0.1

µF

Cvcc

10

µF

MUTE CONTROL

SYSTEM CONTROL

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.

Copyright

 2003, Texas Instruments Incorporated

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.