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DESCRIPTION

APPLICATIONS

SIMPLIFIED APPLICATION CIRCUIT

CODEC

VDD

SPKR

SPKR_LIN–

BYPASS

SGND

HP_EN

SPKR_EN

SPKR_RIN–

SPKR_LIN+

HP_INR

HP_INL

HPVDD

CPVDD

VDD

REG_EN

REG_OUT

SPKR_RIN+

ROUT+

LOUT+

ROUT–

LOUT–

SPVDD

CPVSS

C1P

HPVSS

SPGND

CPGND

C1N

GAIN0

GAIN1

OUTL

OUTR

HPR

HPL

SPKL

TPA6040A4

Shutdown

Control

3V – 5.5V

4.5V – 5.5V

RegulatorEnable

4.75V(ToCODEC)

4.5V – 5.5V

Gain

Control

TPA6040A4

SLOS519A – APRIL 2007 – REVISED APRIL 2007

2-W STEREO AUDIO POWER AMPLIFIER

WITH DirectPath™ STEREO HEADPHONE DRIVE AND REGULATOR

• Microsoft™Windows Vista™ Compliant

The TPA6040A4 is a stereo audio power amplifier

and DirectPath™ headphone amplifier in a thermally

• Fully Differential Architecture and High PSRR

enhanced, space-saving, 32-pin QFN package. The

Provide Excellent RF Rectification Immunity

speaker amplifier is capable of driving 2 W per

• 2-W, 10% THD+N Into 4-Ω Speakers and

channel continuously into 4-

Ω loads at 5 V. The

85-mW, 1% THD+N Into 16-

Ω Headphones

headphone amplifier achieves a minimum of 85 mW

From 5-V Supply

at 1% THD+N from a 5-V supply. A built-in internal

• DirectPath™ Headphone Amplifier Eliminates

4-step gain control for the speaker amplifier and a

fixed –1.5 V/V gain for the headphone amplifier

minimizes external components needed.

• Internal 4-Step Speaker Gain Control: 6, 10,

15.6, 21.6 dB and Fixed –1.5-V/V Headphone

Independent shutdown control and dedicated inputs

for

the

speaker

and

headphone

allow

the

• 4.75-V Low Dropout Regulator for CODEC

TPA6040A4

to

simultaneously

drive

both

• Independent Shutdown Controls for Speaker,

headphones and internal speakers. Differential inputs

Headphone Amplifier, and Low Dropout

to the speaker amplifiers offer superior power-supply

Regulator (LDO)

and common-mode noise rejection.

• Output Short-Circuit and Thermal Protection

• Notebook Computers

• Portable DVD

(1)

US Patent Number 5289137

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.

DirectPath, PowerPAD are trademarks of Texas Instruments.

Microsoft, Windows Vista are trademarks of Microsoft Corporation.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, 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.