TPA3125D2_15 Datasheet, PDF (1/26 Pages) Texas Instruments – 10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

TPA3125D2
www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008
10-W STEREO CLASS-D AUDIO POWER AMPLIFIER
FEATURES
1
•234 10-W/Ch (stereo SE) into an 8-Ω Load From a
24-V Supply
• 20-W/Ch (mono BTL) into an 8-Ω Load from a
24-V Supply
• Operates From 10 V to 26 V
• Operates From +24 V LCD Backlight Supply
• Efficient Class-D Operation Eliminates Need
for Heat Sinks
• Four Selectable, Fixed-Gain Settings
• Single-Ended Analog Inputs
• Thermal and Short-Circuit Protection With
Auto Recovery
• 20-Pin DIP Package
• Advanced Power-Off Pop Reduction
APPLICATIONS
• Flat Panel Televisions
• DLP^® TVs
• CRT TVs
• Powered Speakers
DESCRIPTION
The TPA3125D2 is a 10-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
TPA3125D2 can drive stereo speakers as low as 4 Ω.
The efficiency of the TPA3125D2 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.
The thru-hole package allows placement on
single-sided printed circuit boards.
SIMPLIFIED APPLICATION CIRCUIT
Left Channel
Right Channel
1 mF
1 mF
1 mF
TPA3125D2
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
S0267-02
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
All other trademarks are the property of their respective owners.
4
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