Stereo 20W Class D Audio Amplifier – MAX9744

Description Stereo 20W Class D Audio Amplifier - MAX9744

Turn up the volume with the Stereo 20W Class D Audio Amplifier - MAX9744. This compact board is equipped with a class D amplifier. It can drive 2 channels of 4-8 ohm speakers with 20W power each. It board can be powered with 5-12VDC via the DC power connection. To enjoy music with ease, connect stereo line level to the 3,5mm stereo headphone jack. Thanks to the class D technology, this amplifier runs cool. No heat sinks are required and the efficiency is high, up to 93%. This makes it ideal for portable or battery operated systems.

The heart of this board is the MAX9744 amplifier. It is known for its ease of use. But also for the possibility of both analogue and digital volume control. Adjust the volume with a single 1KΩ potentiometer (included) for analog adjustments. Or connect it to a microcontroller and send I2C commands for 64 volume levels.

Features Stereo 20W Class D Audio Amplifier - MAX9744

• Power supply of 4.5V-14V DC voltage

• Up to 93% efficiency (88-93% typical)

• 20mA quiescent current (or switch off for 1uA quiescent current)

• Up to 29.5dB maximum gain

• Supports DC or AC coupled line input up to 3Vpp

• Filterless spread-spectrum modulation reduces RF emissions

• 20W stereo output (4Ω, VDD = 12V, THD+N = 10%)

• Low 0.04% THD+N

• Integrated click and pop suppression

• Protection against short circuit and thermal overload