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Texas Instruments TAS2563 Class-D Audio Amplifiers

Texas Instruments TAS2563 Class-D Audio Amplifiers are optimized to efficiently drive high peak power into small loudspeaker applications. The TAS2563 features 6.1W of peak power into a 4Ω load at a battery voltage of 3.6V and supports boost bypass mode (external PVDD mode), where it can achieve 12W at 10% THD+N (4Ω at 12V). Devices can share a common bus via I2S/TDM + I2C interfaces.

The device offers an on-chip, low-latency DSP that supports TI's SmartAmp speaker protection algorithms, maximizing loudness while maintaining safe speaker conditions. Real-time monitoring of the loudspeakers is supported through integrated speaker voltage and current sense with an internal protection algorithm, permitting pushing peak SPL while keeping speakers in a safe operating area. Amplifier headroom over the entire charge cycle is optimized using a battery-tracking peak voltage limiter with brown-out prevention, preventing system shutdowns. The Texas Instruments TAS2563 device has a compact PCB footprint and is available in a 42-ball, 0.4mm pitch DSBGA (YBG) package.

Features

  • High-performance Class-D amplifier
    • 6.1W 1% THD+N (4Ω at 3.6V)
    • 5W 1% THD+N (8Ω at 3.6V)
    • Boost bypass mode: 10W (12W) at 1% (10%) THD+ N (4Ω,12V)
  • 15µVrms A-weighted idle channel noise
  • 112.5dB SNR at 1% THD+N (8Ω)
  • 100dB PSRR with 200mVPP ripple at 20Hz to 20kHz
  • 83.5% efficiency at 1W (8Ω, VBAT = 4.2V)
  • <1µA HW shutdown VBAT current
  • Speaker voltage and current sense
  • VBAT tracking peak voltage limiter with brown-out prevention
  • Spread-spectrum low EMI mode
  • Thermal and overcurrent protection
  • 42-Ball, 0.4mm pitch, DSBGA package
  • Dedicated real-time DSP for speaker protection
    • Thermal and excursion protection
    • Detects leaks and damaged speaker
  • 14.47kHz to 96kHz sample rates
  • 2 PDM MIC Inputs
  • Flexible user interfaces
    • I2S/TDM: Eight channels (32bit / 96kHz)
    • I2C: Selectable addresses
  • MCLK free operation
  • Two 2.54 to 6.76MHz PDM inputs
  • Advanced brown-out prevention
  • Power supplies
    • VBAT: 2.7V to 5.5V
    • VDD: 1.65V to 1.95V
    • IOVDD: 1.65V to 3.6V

Applications

  • Smartphone
  • Tablets
  • Laptop
  • Wireless speaker

Simplified Schematic

Schematic - Texas Instruments TAS2563 Class-D Audio Amplifiers
Published: 2019-05-20 | Updated: 2023-09-19