TPA3121D2 Datasheet, PDF (1/29 Pages) Texas Instruments – 15-W STEREO CLASS-D AUDIO POWER AMPLIFIER

TPA3121D2
www.ti.com........................................................................................................................................................................................................ SLOS537 – MAY 2008
15-W STEREO CLASS-D AUDIO POWER AMPLIFIER
FEATURES
1
•23 10-W/Ch Stereo Into an 8-Ω Load From a 24-V
Supply
• 15-W/Ch Stereo Into a 4-Ω Load from a 22-V
Supply
• 30-W/Ch Mono Into an 8-Ω Load from a 22-V
Supply
• Operates From 10 V to 26 V
• Can Run From +24 V LCD Backlight Supply
• Efficient Class-D Operation Eliminates Need
for Heat Sinks
• Four Selectable, Fixed-Gain Settings
• Internal Oscillator to Set Class D Frequency
(No External Components Required)
• Single-Ended Analog Inputs
• Thermal and Short-Circuit Protection With
Auto Recovery
• Space-Saving Surface Mount 24-Pin TSSOP
Package
• Advanced Power-Off Pop Reduction
APPLICATIONS
• Flat Panel Display TVs
• DLP^® TVs
• CRT TVs
• Powered Speakers
DESCRIPTION
The TPA3121D2 is a 15-W (per channel), efficient,
class-D audio power amplifier for driving stereo
speakers in a single-ended configuration or a mono
speaker in a bridge-tied-load configuration. The
TPA3121D2 can drive stereo speakers as low as 4 Ω.
The efficiency of the TPA3121D2 eliminates the need
for an external heat sink when playing music.
The gain of the amplifier is controlled by two gain
select pins. The gain selections are 20, 26, 32, and
36 dB.
The patented start-up and shutdown sequences
minimize pop noise in the speakers without additional
circuitry.
SIMPLIFIED APPLICATION CIRCUIT
Left Channel
Right Channel
1 mF
1 mF
1 mF
TPA3121D2
0.22 mF
LIN
BSR
33 mH
RIN
ROUT
PGNDR
0.22 mF
BYPASS
AGND
PGNDL
LOUT
BSL
0.22 mF
33 mH
0.22 mF
470 mF
470 mF
10 V to 26 V
AVCC
PVCCL
PVCCR
10 V to 26 V
Shutdown Control
VCLAMP
SD
1 mF
Mute Control
MUTE
GAIN0
GAIN1
4-Step Gain Control
S0267-01
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.
DLP is a registered trademark of Texas Instruments.
2
System Two, Audio Precision are trademarks of Audio Precision, Inc.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated