Texas Instruments TPA6043A4 Data Sheet Manual
Summary
This advanced stereo audio power amplifier is engineered for portable and embedded devices, such as notebook computers, requiring high-performance audio delivery in tight spaces. Featuring DirectPath™ technology, it delivers substantial power—driving 2 W into 4-Ω speakers while powering headphones up to 85 mW at low distortion. The manual provides detailed technical specifications, including functional block diagrams, integrated LDO regulation, and comprehensive application circuit examples for system developers planning sophisticated multimedia audio solutions.
Page 1 Text Content
TPA6043A4
www.ti.com
SLOS543–AUGUST
2-W STEREO AUDIO POWER AMPLIFIER
WITH Direct Path™ STEREO HEADPHONE DRIVE AND REGULATOR
1FEATURES
DESCRIPTION
23• Microsoft™ Windows Vista™ Compliant
Fully Differential Architecture and High PSRR The TPA6043A4 is stereo audio power amplifier
Excellent RF Rectification Immunity and Direct Path™ headphone amplifier in thermally Provide
enhanced, space-saving, 32-pin QFN package. The•
2-W, 10% THD+N Into 4-Ω Speakers and
speaker amplifier is capable of driving per85-m W,
1% THD+N Into 16-Ω Headphones
channel continuously into 4-Ω loads at V. The
From 5-V Supply
headphone amplifier achieves minimum of m W
Direct Path™ Headphone Amplifier Eliminates at 1% THD+N from 5-V supply. built-in internal
Output Capacitors 4-step gain control for the speaker amplifier and
fixed –1.5 V/V gain for the headphone amplifier•
Internal 4-Step Speaker Gain Control: 6, 10,
minimizes external components needed.15.6,
21.6 d B and Fixed –1.5-V/V Headphone
3.3-V Low Dropout Regulator for CODEC Independent shutdown control and dedicated inputs•
for the speaker and headphone allow the TPA6043A4•
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.
APPLICATIONS
Notebook Computers
Portable DVD
(1) US Patent Number
SIMPLIFIED APPLICATION CIRCUIT
TPA6043A4
CODEC
ROUT+ ROUT–
SPKR SPKR_RIN+ HPR SPKR_RIN– LOUT+
HPL LOUT–
SPKL SPKR_LIN+
SPKR_LIN–
SPVDD 4.5 V 5.5 V
SPGND
BYPASS
GAIN0
HP_EN
Control
Shutdown GAIN1
Control
SPKR_EN OUTL
HP_INR
SGND OUTR
HPVSS
HP_INL
CPVSS
3 V 5.5 V HPVDD
CPVDD CPGND
Regulator Enable REG_EN
REG_OUT
3.3 V (To CODEC)
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.
2Direct Path, Power PAD are trademarks of Texas Instruments.
3Microsoft, 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.
Page Summary Contents For Texas Instruments TPA6043A4 Data Sheet Manual
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 30 |
| File Size | 1.04 MB |
| Published | July 16, 2026 |
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Frequently Asked Questions
What is the TPA6043A4's typical output capability?
It can drive 2 W per channel into 4-Ω speakers and achieve 85 mW at 1% THD+N into 16-Ω headphones using a 5 V supply.
What protection features does the amplifier include?
The TPA6043A4 includes over-current, output short-circuit, and thermal protection rejection circuits.
How can users control the speaker gain?
It has an internal 4-step speaker gain control with settings of 6 dB, 10 dB, 15.6 dB, and 21.6 dB.
Is the unit compliant for specific industries (e.g., automotive)?
The components are not designed or intended for use in automotive environments unless they are specifically designated by TI as compliant with ISO/TS 16949 requirements.