Adafruit STEMMA Audio Amp - Mono 2.5W Class D - PAM8302

A compact Class D mono amplifier that delivers up to 2.5W of audio power to 4-8 ohm speakers. Features a STEMMA JST-PH connector for plug-and-play audio input—no soldering required. Perfect for adding sound to microcontroller projects.

Highly efficient (>90%) with built-in thermal and short-circuit protection.

Key Features

• 2.5W Output – Plenty of power for small speakers
• Class D Efficiency – Over 90% efficient, minimal heat
• STEMMA Connector – Plug-and-play JST-PH audio input
• Wide Voltage Range – 2.0V to 5.5V DC operation
• Volume Control – Onboard trim potentiometer
• Built-in Protection – Thermal, short-circuit, and over-current
• Low Quiescent Current – 4mA active, 0.5mA shutdown

Specifications

• IC – PAM8302
• Output Power – 2.5W @ 4Ω, 1.5W @ 8Ω (5.5V supply)
• Gain – Fixed 24dB
• PSRR – 50dB @ 1kHz
• Operating Voltage – 2.0–5.5V DC
• Speaker Impedance – 4Ω minimum

Package Contents

• 1× STEMMA Audio Amp board
• 1× Breadboard headers
• 1× 3.5mm screw terminal block

Ideal For

• Adding audio to Raspberry Pi projects
• Microcontroller sound effects
• Portable speakers
• Alert and notification systems