Tutorial: Stereo 3.7W Class D Audio Amplifier @ The Adafruit Learning System.

This incredibly small stereo amplifier is surprisingly powerful – able to deliver 2 x 3.7W channels into 3 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC. Since the amp is a class D, its incredibly efficient (over 90% efficient when driving an 8Ω speaker at over a Watt).

This amplifier is perfect for portable and battery-powered projects. It has built in thermal and over-current protection, but you really have to drive it hard before it even gets warm! This board is a welcome upgrade to basic “LM386″ amps!

Learn more and check out the Adafruit Stereo 3.7W Class D Audio Amplifier – MAX98306.