TPA3244, High-Perfomance, Class-D Amplifier

TPA3244, High-Perfomance, Class-D Amplifier

Texas Instruments' TPA3244 device 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. With a 30 V power supply, the device can drive up to 2 x 110 W peak into a 4 Ω load and 2 x 60 W continuous into an 8 Ω load and features a 2 VRMS analog input interface that works seamlessly with high-performance DACs, such as the Burr-Brown PCM52xx DAC family from TI (that is, PCM5242 / PCM5252). In addition to excellent audio performance, the TPA3244 achieves both high power efficiency and very-low power stage idle losses, below 0.45 W. This is achieved through the use of 65 mΩ MOSFETs and an optimized gate driver scheme that achieves significantly lower idle losses than typical discrete implementations.

Features
  • Differential analog inputs
  • Total output power at 10%THD+N
    • 60 W stereo continuous into 8 Ω in BTL configuration at 30 V
    • 110 W stereo peak into 4 Ω in BTL configuration at 30 V
  • Total output power at 1%THD+N
    • 50 W stereo continuous into 8 Ω in BTL configuration at 30 V
    • 90 W stereo peak into 4 Ω in BTL configuration at 30 V
  • Multiple configurations possible:
    • Stereo, mono, 2.1, and 4xSE
  • Click- and pop-free startup and stop
  • 94% efficient Class-D operation (8 Ω)
  • Wide 12 V to 30 V supply voltage operation

Applications

  • High end soundbar
  • Mini combo systems
  • Blu-Ray Disc™ / DVD receivers
  • Active speakers
  • Advanced integrated feedback design with high-speed gate driver error correction (PurePath Ultra-HD)
    • Signal bandwidth up to 100 kHz for high-frequency content from HD sources
    • Ultra-low 0.005% THD+N at 1 W into 4 Ω and <0.01% THD+N to clipping
    • 60 dB PSRR (BTL, no input signal)
    • < 55 µV (A-weighted) output noise
    • > 110 dB (A-weighted) SNR
  • Self-protection design (including undervoltage, overtemperature, clipping, and short-circuit protection) with error reporting
  • EMI compliant when used with recommended system design

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