TPA3125D2

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10-W stereo, 20-W mono, 10- to 26-V supply, analog input Class-D audio amplifier w/ SE outputs

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Product details

Parameters

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Package | Pins | Size

PDIP (N) 20 229 mm² 24.33 x 9.4 open-in-new Find other Speaker amps

Features

  • 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

DLP Is a trademark of Texas Instruments
System Two, Audio Precision are trademarks of Audio Precision, Inc.

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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.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet 10W Stereo Class-D Audio Power Amplifier datasheet Dec. 12, 2008
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) Aug. 26, 2019
Application note AN-1849 An Audio Amplifier Power Supply Design (Rev. C) Jun. 27, 2019
Application note AN-1737 Managing EMI in Class D Audio Applications (Rev. A) May 01, 2013
User guide TPA3125D2EVM - User Guide Nov. 17, 2008

Design & development

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Hardware development

EVALUATION BOARD Download
99
Description

The TPA3125D2 evaluation module (EVM) consists of a single 10 W, class-D, stereo audio power amplifier, complete with a small number of external components mounted on a circuit board. The EVM can be used to directly drive speakers with an external analog audio source as the input.

Features

  • 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
  • Efficient Class-D Operation
  • Four Selectable, Fixed Gain Settings
  • Internal Oscillator (No External Components Required)
  • Single Ended Analog Inputs
  • Thermal and Short-Circuit (...)

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
PDIP (N) 20 View options

Ordering & quality

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