1

FEATURES

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

TPA6047A4

Shutdown

Control

3V – 5.5V

4.5V – 5.5V

RegulatorEnable

4.75V(ToCODEC)

4.5V – 5.5V

Gain

Control

TPA6047A4

2-W STEREO AUDIO POWER AMPLIFIER

WITH DirectPath™ STEREO HEADPHONE DRIVE AND REGULATOR

23

• Microsoft™ Windows Vista™ Compliant

• Fully Differential Architecture and High PSRR

The TPA6047A4 is a stereo audio power amplifier

and DirectPath™ headphone amplifier in a thermally

Provide Excellent RF Rectification Immunity

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

• 2.1-W, 1% THD+N Into 4-Ω Speakers and

speaker amplifier is capable of driving 2.1 W per

100-mW, 10% THD+N Into 16-

Ω Headphones

channel continuously into 4-

Ω loads at 5 V. The

From 5-V Supply

headphone amplifier achieves a minimum of 100 mW

• DirectPath™ Headphone Amplifier Eliminates

at 10% THD+N from a 5-V supply. A built-in internal

4-step gain control for the speaker amplifier and a

fixed –1.5 V/V gain for the headphone amplifier

• Internal 4-Step Speaker Gain Control: 10, 12,

minimizes external components needed.

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

Independent shutdown control and dedicated inputs

• 4.75-V Low Dropout Regulator for CODEC

for the speaker and headphone allow the TPA6047A4

• Independent Shutdown Controls for Speaker,

to simultaneously drive both headphones and internal

Headphone Amplifier, and Low Dropout

speakers. Differential inputs to the speaker amplifiers

Regulator (LDO)

offer superior power-supply and common-mode noise

• Output Short-Circuit and Thermal Protection

rejection.

• Notebook Computers

• Portable DVD

TPA6040A4

TPA6041A4

TPA6047A4

Speaker

Active Low

Active Low

Active High

Enable

LDO (V)

4.75

3.3

4.75

6, 10, 15.6,

10, 12, 15.6,

10, 12, 15.6,

Gain (dB)

21.6

21.6

21.6

(1)

US Patent Number 5289137

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

DirectPath, PowerPAD are trademarks of Texas Instruments.

3

Microsoft, Windows Vista are trademarks of Microsoft Corporation.

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.