Audio Amplifier Stereo 20W Class D MAX9744 Adafruit

Audio Amplifier Stereo 20W Class D MAX9744 Adafruit

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Audio Amplifier MAX9744 Stereo 20W Class D

Our Audio Amplifier MAX9744 Stereo has a class D amplifier that can drive 2 channels of 4-8 ohm impedance speakers at 20W each.

Since it's class D, no heat sinks are required and it's extremely efficient - up to 93% efficiency.

The MAX9744 amplifier has both analog and digital volume control capability. Use a single 1K? pot to adjust volume analog-style. Send I2C commands to set 64-steps of volume amplification.


  • Power from 4.5V-14V DC voltage
  • Up to 93% efficient (88-93% typical)
  • 20mA quiescent current (or put into shutdown for 1uA quiescent)
  • Up to 29.5dB max gain
  • Use DC or AC coupled line-level input, up to 3Vpp
  • Filterless Spread-Spectrum Modulation Lowers
    Radiated RF Emissions from Speaker Cables
  • 20W Stereo Output (4?, VDD = 12V, THD N = 10%)
  • Low 0.04% THD N
  • Integrated Click-and-Pop Suppression
  • Short-Circuit and Thermal-Overload Protection

Dimensions (without 0.1" header or terminal blocks):

  • Length: 54mm / 2.1"
  • Width: 41mm / 1.6"
  • Height: 2mm / .08"
  • Weight: 11g

MAX9744 Datasheet

Tutorial: Adafruit 20W Stereo Audio Amplifier - MAX9744

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