TAS5755M Digital Audio Amplifiers

TAS5755M Digital Audio Amplifiers

Texas Instruments' TAS5755M are single-chip flexible digital audio solutions with integrated processing that support 2.1 (two speakers + subwoofer), 2.0 or stereo (two speakers), and mono (high power speaker) modes.

Their high efficiency, low 80 mΩ RDSON and pad-up package allow the devices to output up to 2 x 50 W or 1 x 100 W.

Texas Instruments' TAS5755M leverage two full H-bridges which are used for each channel in stereo mode. In 2.1 mode, the TAS5755M run two independent speaker channels using two half-bridges while using a full-bridge to drive a subwoofer. Finally, in mono mode, the TAS5755M support pre-filter parallel bridge-tied load (PBTL) using only one filter stage to reduce total system size and cost.

The TAS5755M have integrated audio processing. It includes signal mixing, DC blocking filters, 2 x 8 + 1 x 2 biquads 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 solution size and BOM cost:
    • Single-chip 2.1, 2.0, and mono mode capable
    • Single-filter in mono (PBTL) mode
    • Pad-up package and 80 mΩ RDSON enhances thermal performance
  • High output power capable:
    • 2 x 19 W +1 x 50 W in 2.1 mode (2 x 4 Ω + 1 x 6 Ω, 24 V)
    • 2 x 50 W in 2.0 mode (2 x 6 Ω, 24 V)
    • 1 x 100 W in mono mode (1 x 2 Ω, 24 V)
    • Wide voltage range: 8 V to 26.4 V
  • Integrated self-protection
    • Thermal protection
    • Overcurrent limit protection
    • Undervoltage protection
  • Integrated audio processing:
    • 2 x 8 + 1 x 2 biquads
    • Two-band + single-band configurable dynamic range control (DRC)
    • License-free 3D effects
    • Signal mixing and DC blocking filter
    • Automatic rate detection
  • Audio performance audio:
    • THD+N ≤ 0.05% at 1 kHz (RSPK = 8 Ω, POUT = 1 W, PVDD = 18 V)
    • ICN ≤ 50 µVRMS
    • Crosstalk ≤ -67 dB
    • SNR ≥ 104 dB
    • BD modulation available, for improved audio performance and efficiency

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