TPA3251 175W Stereo / 350W Mono Ultra-HD, Analog-In Class-D Module


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The TPA3251EVM Ultra-HD evaluation module demonstrates the TPA3251 integrated circuit from Texas Instruments. The TPA3251 is a high-performance Class-D amplifier that enables true premium sound quality with high efficiency Class-D technology. It features an advanced integrated feedback design and high-speed gate driver error correction, which enables ultra-low distortion across the audio band and superior audio quality.

This EVM supports 2 BTL (stereo 2.0) output channels,  1 PBTL (mono 0.1) output channel, 1 BTL plus 2 SE (2.1) output channels,  and 4 SE (4.0) output channels configurations. The NE5532 is a High Performance Audio Op Amp designed to allow TPA3251 operation with differential or single ended input signals to the EVM with differential inputs yielding the optimal performance. TPA3251EVM is a complete 2Vrms analog input 2 × 175 W stereo/1 x 350 W mono power amplifier ready for evaluation and excellent listening experience.

  • Supports Post-Filter Feedback
  • Self-contained protection system (short circuit, clip and thermal)
  • Standard 2VRMS differential input or single ended line input
  • BTL, PBTL and SE output configurations support
  • Double-sided, plated-through, 2oz. Cu 2 layer PCB layout
  • Supports Audio Plug-In Boards through its AIB connector

  • TPA3251EVM

Speaker amps
TPA3251 175-W stereo, 350-W mono, 12- to 38-V supply, analog input Class-D Smart Audio Amplifier


Audio op amps
NE5532 Dual, 30-V, 10-MHz, low-noise operational amplifier for audio applications


Linear & low-dropout (LDO) regulators
LM2940-N 1-A, 26-V, high-PSRR, low-dropout voltage regulator TLV1117 800-mA, 15-V, linear voltage regulator


Supervisor & reset ICs
TPS3802 400-ms delay, small supply voltage supervisors with manual reset

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Evaluation board

TPA3251EVM — 175W Stereo, 350W Mono Ultra-HD, Analog-In Class-D Amplifier Evaluation Module

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Technical documentation

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Type Title Date
* User guide TPA3251 Evaluation Module User's Guide Nov. 02, 2017
Certificate TPA3251EVM EU Declaration of Conformity (DoC) Jan. 02, 2019
Application note TPA324x and TPA325x Post-Filter Feedback (Rev. A) Mar. 07, 2018
More literature TPA3251EVM Quick Start Guide Nov. 13, 2017
Application note Multi-Device Configuration for TPA32xx Amplifiers Sep. 27, 2017
Application note Class-D Amplifier External Load Diagnostics Jan. 23, 2017
Application note TPA32xx Analog Input Grounding for Single Ended Inputs PDF | HTML Aug. 26, 2016

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