Back to Texas Instruments

Texas Instruments TPA3251 Ultra-HD Class-D Audio Amplifier

Texas Instruments TPA3251 Ultra-HD Class-D Audio Amplifier is a high-performance class-D power amplifier that enables true premium sound quality with class-D efficiency. It features an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePath™ Ultra-HD). This technology allows ultra-low distortion across the audio band and superior audio quality. The device can drive up to 2x175W into a 4Ω load and 2x220W into a 3Ω load. It features a 2VRMS analog input interface that works seamlessly with high-performance DACs such as TI's PCM5242. In addition to excellent audio performance, the TPA3251 achieves high power efficiency and very low power stage idle losses below 1W.

Features

  • Differential analog inputs
  • Total output power at 10%THD+N
    • 175W stereo into 4Ω in BTL configuration
    • 220W stereo into 3Ω in BTL configuration
    • 350W mono into 2Ω in PBTL configuration
  • Total output power at 1%THD+N
    • 140W stereo into 4Ω in BTL configuration
    • 175W stereo into 3Ω in BTL configuration
    • 285W mono into 2Ω in PBTL configuration
  • Advanced integrated feedback design with high-speed gate driver error correction (PurePath Ultra-HD)
    • Signal bandwidth up to 100kHz for high-frequency content from HD sources
    • Ultra-low 0.005% THD+N at 1W into 4Ω and <0.01% THD+N to clipping
    • 60dB PSRR (BTL, no input signal)
    • <60µV output noise
    • >111dB SNR
  • Multiple Configurations Possible
    • Stereo, Mono, 2.1 and 4xSE
  • Click and pop free startup and stop
  • 90% efficient Class-D operation (4Ω)
  • Wide 12V to 36V supply voltage operation
  • Self-protection design (including undervoltage, overtemperature, clipping, and short circuit protection) with error reporting
  • EMI compliant when used with recommended system design

Applications

  • Blu-ray Disk™ / DVD receivers
  • High-end HTiB systems
  • AV receivers
  • High-end soundbar
  • Mini combo systems
  • Active speakers and subwoofers

Related Development Tools

Texas Instruments SIDEGIG-XOVEREVM Crossover Audio Plug-in Module

Turns TI Audio Class-D amplifier evaluation modules into a high quality, two-way speaker amplifier.

Learn Moreabout Texas Instruments SIDEGIG-XOVEREVM Crossover Audio Plug-in Module View Productsrelated to Texas Instruments SIDEGIG-XOVEREVM Crossover Audio Plug-in Module

Simplified Schematic

Schematic - Texas Instruments TPA3251 Ultra-HD Class-D Audio Amplifier
Published: 2015-08-25 | Updated: 2024-05-02