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Texas Instruments TAS5755M Digital Input Audio Amplifier

Texas Instruments TAS5755M Digital Input Audio Amplifier is a single-chip flexible digital audio solution with integrated processing. This integrated processing supports 2.1 (2 speakers + subwoofer), 2.0 or stereo (2 speakers), and mono (high power speaker) modes. Its high efficiency, low 80mΩ RDSON, and pad-up package allows the device to output up to 2×50W or 1×100W. TAS5755M leverages two full H-bridges used for each channel in stereo mode. In 2.1 mode, TAS5755M runs two independent speaker channels using two half-bridges while using a full bridge to drive a subwoofer. Finally, in mono mode, TAS5755M supports pre-filter parallel bridge-tied load (PBTL) using only one filter stage to reduce total system size and cost.

The Texas Instruments TAS5755M has integrated audio processing. It includes signal mixing, DC blocking filters, and 2×8 + 1×2 bi-quads for equalization. Power limiting is implemented by leveraging a two-band log-style DRC and a separate single-band DRC for the subwoofer channel.

Features

  • Reduced sol
    • Single-chip 2.1, 2.0, and mono mode capable
    • Single-filter in mono (PBTL) mode
    • Pad-up package and 80mΩ RDSON enhances thermal performance
  • High-output power capable
    • 2×19W + 1×50W in 2.1 mode (2×4Ω + 1×6Ω, 24V)
    • 2×50W in 2.0 mode (2×6Ω, 24V)
    • 1×100W in mono mode (1×2Ω, 24V)
    • 8V to 26.4V wide voltage range 
  • Audio performance audio
    • THD+N ≤ 0.05% at 1kHz (RSPK = 8Ω, POUT = 1W, PVDD = 18V)
    • ICN ≤ 50µVRMS
    • Crosstalk ≤ -67dB
    • SNR ≥ 104dB
    • BD modulation available for improved audio performance and efficiency
  • Integrated audio processing
    • 2×8 + 1×2 bi-quads
    • Two-band + single-band configurable Dynamic Range Control (DRC)
    • License-free 3D effects
    • Signal mixing and DC blocking filter
    • Automatic rate detection
  • Integrated self-protection
    • Thermal protection
    • Over-current limit protection
    • Under-voltage protection

Applications

  • DTV, UHD, and multi-purpose monitors
  • Soundbars, PC audio
  • General-purpose audio equipment

Functional Block Diagram

Block Diagram - Texas Instruments TAS5755M Digital Input Audio Amplifier
發佈日期: 2018-05-15 | 更新日期: 2023-01-03