Texas Instruments TPA6021A4 2-W Stereo Audio Power Amplifier with Advanced DC Volume Control
Summary
The TPA6021A4 is a robust 2W stereo audio power amplifier designed to boost signals into external speakers and headphones. Featuring advanced functionality like DC Volume Control in Fade Mode and dedicated headphone outputs, this chip provides clean, reliable amplification for 4-Ω loads. This manual serves as the comprehensive technical guide for engineers and hobbyists, detailing crucial electrical characteristics, operating parameters, and system integration guidelines necessary for developing high-quality audio equipment.
Page 1 Text Content
TPA6021A4
www.ti.com
SLOS465–JUNE
2-W STEREO AUDIO POWER AMPLIFIER
WITH ADVANCED DC VOLUME CONTROL
FEATURES DESCRIPTION
Into 4-Ω Speakers With External Heatsink
The TPA6021A4 is stereo audio power amplifier
DC Volume Control With 2-d B that drives W/channel of continuous RMS power•
from -40 d B to d B into 4-Ω load when utilizing heat sink. Advanced Steps
dc volume control minimizes external components–
Fade Mode
and allows BTL (speaker) volume control and SE
-85-d B Mute Mode
(headphone) volume control.
Differential Inputs
The 20-pin DIP package allows for the use of
1-µA Shutdown Current (Typical) heatsink which provides higher output power.
Headphone Mode
To ensure smooth transition between active and
shutdown modes, fade mode ramps the volume up
APPLICATIONS
and down.
LCD Monitors
DC VOLUME CONTROL
Speaker
ROUT+
SE/BTL 100 k W
ROUT-
BTL Volume
0.47 Fm
Power Supply PVDD
In From DAC -20 or
Ci 0.47 Fm VOLUME
Right Positive Potentiometer -30
Differential Input Signal (DC Voltage)
Ci 0.47 Fm
Right Negative RIN-
Differential Input Signal AGND -50
(BYP)
VDD -60
Headphones
VDD BYPASS -70
0.47 Fm -80
Left Negative 0.47 Fm FADE
LIN- 1 k W -90
Differential Input Signal
System Volume [Pin 18] - V
Left Positive 0.47 Fm
LIN+ SHUTDOWN Control
Differential Input Signal
VDD NC
Power Supply PVDD
LOUT+
Speaker
0.47 Fm LOUT- PGND
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.
PRODUCTION DATA information is current as of publication date. Copyright 2005, 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 TPA6021A4 2-W Stereo Audio Power Amplifier with Advanced DC Volume Control
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 26 |
| File Size | 1.78 MB |
| Published | June 04, 2026 |
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Frequently Asked Questions
What is the continuous RMS power output into a 4-Ω load?
It delivers 2 W per channel of continuous RMS power when utilizing an external heatsink.
Is dedicated cooling required for operation?
Yes, using an external heatsink is necessary to achieve the highest specified output power levels.
What precautions are needed during handling and storage?
To prevent electrostatic damage, leads should be shorted together or the device placed in conductive foam.