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Texas Instruments TPA6304-Q1 Class-D Audio Amplifier

Texas Instruments TPA6304-Q1 Class-D Audio Amplifier is a four-channel analog-input Class-D Burr-Brown™ audio amplifier that implements a 2.1MHz PWM switching frequency. This device enables a cost-optimized solution in a very small 2.7cm2 PCB size, high impedance single-ended inputs, and full operation down to 4.5V for start/stop events.

The Texas Instruments TPA6304-Q1 Class-D audio amplifier has an optimal design for use in entry-level automotive head units that provide analog audio input signals as part of their system design. The Class-D topology dramatically improves efficiency over traditional linear amplifier solutions.

The output switching frequency can be set either above or below the AM band. If the output switching frequency is set above the AM band it eliminates the AM band interference and reduces output filter size and cost. If the output switching frequency is set below AM band it will further optimize efficiency. The device is available in a 44 pin HTSSOP package with the exposed thermal pad up.

Features

  • Highest efficiency Class-D
    • Significantly more efficient than Class-AB
    • Reduce thermal solution with 75% less heat dissipation than Class-AB
  • Start/stop operation down to 4.5V
  • AEC-Q100 Qualified for automotive applications
    • Temperature grade 1: –40°C to 125°C TA
    • HBM ESD Classification level 2
    • CDM ESD Classification level C2B
  • 27W, 10% THD into 4Ω at 14.4V
    • Drives 4Ω and 2Ω loads
  • Load diagnostics
    • Output open shorted load
    • Output-to-battery or ground shorts
    • Tweeter connected
  • Designed with advanced gate drive to meet CISPR25-L5 EMC specification
    • Class-D at 2.1MHz, no AM interference
    • Spread Spectrum mode, Phase Offset, Slew Rate Control
  • Protection
    • 40V Load dump
    • Output short protection
    • DC offset and over temperature
    • Fortuitous open ground and power tolerant
  • Audio inputs
    • 4 Channel single-ended analog input
    • 10dB, 16dB, 22dB or 28dB Gain option
  • Supports parallel channel drive (PBTL)
  • Audio performance into 4Ω at 14.4V, 1kHz
  • THD+N < 0.006%
    • 42µVRMS output noise
    • 80dB PSRR
    • Efficiency > 80%
  • Special features
    • Programmable clip detection
    • Load current limiter
    • Thermal gain foldback
    • Fast and autonomous startup diagnostics
    • AC load impedance measurement with < 10mA load current

Applications

  • Automotive head units
  • Automotive external amplifier modules

Functional Block Diagram

Block Diagram - Texas Instruments TPA6304-Q1 Class-D Audio Amplifier
發佈日期: 2021-01-26 | 更新日期: 2022-03-11