Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302

This compact mono amplifier is a powerful solution, capable of delivering up to 2.5 Watts to 4-8 ohm impedance speakers. Featuring a Class D controller, it operates efficiently from 2.0V-5.5VDC and boasts an efficiency of over 90% when driving an 8Ω speaker, making it ideal for portable, battery-powered projects. It includes built-in thermal and over-current protection, ensuring safe operation, while remaining cool even under load. A volume trim pot on the board lets you adjust the volume from the default 24dB gain.

Key Features:

• Output Power: 2.5W at 4Ω, 1.5W at 8Ω with a 5.5V supply and 10% THD.
• Class D Amplifier: Over 90% efficiency, ideal for battery-powered projects.
• Differential Inputs: The A+ and A- inputs go through 1.0uF capacitors, making them fully differential. If your output isn’t differential, simply tie the Audio- pin to ground.
• Bridge-Tied Output: The amplifier connects directly to the speaker pins with no ground connection, using 250KHz square wave PWM that is averaged out by the speaker coil.
• Filterless Design: Uses ferrite beads and capacitors on the output to smooth the signal.
• Thermal & Short-Circuit Protection: Built-in protection features for added safety.

Additional Features:

• Low Power Consumption: 4mA quiescent current and 0.5mA in shutdown mode.
• Quick Setup: Includes a fully assembled and tested breakout board with a header for breadboard use and 3.5mm screw-terminal blocks for easy speaker attachment.
• Ready to Use: Set up your project in just 15 minutes.
• Speaker Compatibility: Works with any 4Ω or greater impedance speaker (speaker not included).

This board offers a reliable and efficient upgrade to the standard LM386 amps, perfect for your next audio project.