SLOS507E – MARCH 2007 – REVISED SEPTEMBER 2007
25-W STEREO CLASS-D AUDIO POWER AMPLIFIER
•2 25-W/ch into a 4-Ω Load from a 27-V Supply
• 20-W/ch into a 4-Ω Load from a 24-V Supply
• Operates from 10 V to 30 V
• Efficient Class-D Operation Eliminates Need
for Heat Sinks
• Four Selectable, Fixed-Gain Settings
• Internal Oscillator (No External Components
• Single-Ended Analog Inputs
• Thermal and Short-Circuit Protection With
• Space-Saving Surface-Mount 24-Pin TSSOP
The TPA3120D2 is a 25-W (per channel) efficient,
Class-D audio power amplifier for driving stereo
speakers in a single-ended configuration or a mono
bridge-tied speaker. The TPA3120D2 can drive
stereo speakers as low as 4 Ω. The efficiency of the
TPA3120D2 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,
The patented start-up and shut-down sequences
minimize pop noise in the speakers without additional
SIMPLIFIED APPLICATION CIRCUIT
22 mH 470 mF
10 V to 30 V
10 V to 30 V
} 4-Step Gain
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.
System Two, Audio Precision are trademarks of Audio Precision, Inc.
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 © 2007, Texas Instruments Incorporated