Adafruit Stereo 3.7W Class D Audio Amplifier - MAX98306

This incredibly small stereo amplifier unleashes surprising power with 2 x 3.7W channels into 3 ohm impedance speakers. Nestled within the miniature chip is a class D controller, operating efficiently from 2.7V-5.5VDC.

Remarkably efficient, achieving over 90% efficiency when driving an 8Ω speaker at over a Watt, it’s ideally suited for portable and battery-powered projects. With built-in thermal and over-current protection, it remains impressively cool.

A step above basic "LM386" amps, the amplifier boasts fully 'differential' inputs via 1.0uF capacitors. The outputs are "Bridge Tied," directly linking to outputs without grounding.

Emitting a 360KHz square wave PWM, the sound frequencies harmonize through the speaker coil, ensuring only pure auditory bliss reaches your ears. Designed to drive speakers directly, bypass additional amplifiers for optimal performance.

Comes with a fully assembled and tested breakout board featuring 1.0uF input capacitors, pre-soldered 3.5mm screw-terminal blocks for convenient speaker attachment, and a jumper for flexible gain adjustment.

Specifications include 3.7W output power at 3Ω and a high 83dB PSRR at 217Hz. It supports five pin-selectable gains, excellent click-and-pop suppression, and draws low current with just 2mA in quiescent mode and 10uA in shutdown.