TPA6304-Q1 45-W, 2.1-MHz analog input 4-channel automotive Class-D Burr-Brown? audio amplifier |

This product is prototype/experimental and has not been released to the market. Testing and final processes may not be complete. This product may be subject to further changes or possible discontinuation.
45-W, 2.1-MHz analog input 4-channel automotive Class-D Burr-Brown? audio amplifier


More Information and Sample Availability

Full data sheet and other information are available. Request now

Prototype samples are available (PTPA6304QDDVRQ1). Request now


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

The 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 the AM band, which eliminates the AM band interference and reduces output filter size and cost, or below AM band to further optimize efficiency.

The device is offered in a 44 pin HTSSOP package with the exposed thermal pad up.


  • Highest efficiency
    • Significantly more efficient than Class-AB
    • Reduce thermal solution with 75% less heat dissipation than Class-AB
  • Start/stop operation down to 4.5 V
  • AEC-Q100 Qualified for automotive applications:
    • Temperature grade 1: –40°C to 125°C TA
    • HBM ESD Classification level 2
    • CDM ESD Classification level C4B
  • 27 W, 10% THD into 4 Ω at 14.4 V
    • Drives 4 Ω and 2 Ω loads
  • Load diagnostics
    • Output open, shorted load
    • Output-to-battery or ground shorts
    • Tweeter connected
  • Designed to meet CISPR25-L5 EMC specification
    • Class-D at 2.1 MHz, no AM interference
    • Spread Spectrum mode
  • Protection
    • 40 V Load dump
    • Output short protection
    • DC offset and over temperature
    • Fortuitous open ground and power tolerant
  • Audio inputs
    • 4 Channel single-ended analog input
    • 10 dB, 16 dB or 28 dB Gain option
  • Supports parallel channel drive (PBTL)
  • Audio performance into 4 Ω at 14.4 V, 1 kHz
    • THD+N < 0.1%
    • 42 µVRMS Output Noise
    • 75 dB PSRR
    • Efficiency > 80%
  • Special features
    • Programmable clip detection
    • Load current limiter
    • Thermal gain foldback
    • Fast and autonomous startup diagnostics
    • AC load impedance measurement with
      < 10 mA load current

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Part number Order Audio input type Architecture Power stage supply (Min) (V) Power stage supply (Max) (V) Load (Min) (ohms) THD + N @ 1 kHz (%) Control interface Closed/open loop Analog supply (Min) (V) Analog supply (Max) (V) Power to parallel bridge tied load (Max) (W) PSRR (dB) Operating temperature range (C) Rating
TPA6304-Q1 Order now Analog Input     Class-D     4.5     18     2     0.09     I2C     Closed     4.5     18     55     75     -40 to 125     Automotive