Adafruit STEMMA Audio Amp - Mono 2.5W Class D - PAM8302
100 units available with a short lead time.
The Adafruit STEMMA Audio Amp is a compact mono Class D amplifier based on the PAM8302 chip, delivering up to 2.5W into 4 Ω speakers from a 2.0–5.5V DC supply. With over 90% efficiency at half a watt into 8 Ω, it's ideal for portable and battery-powered audio projects.
This plug-and-play STEMMA version requires no soldering — audio input connects via a JST-PH 3-pin connector. The output is bridge-tied and drives speakers directly through a filterless design with ferrite bead and capacitor filtering. A built-in trim pot lets you adjust volume down from the default 24 dB gain.
Key Features
- PAM8302 Class D Amplifier – 2.5W at 4 Ω or 1.5W at 8 Ω (10% THD, 5.5V supply)
- Wide Voltage Range – 2.0–5.5V DC operation
- High Efficiency – Over 90% at 0.5W into 8 Ω
- Volume Trim Pot – Adjustable from default 24 dB gain
- Thermal + Overcurrent Protection – Built-in safety features
- Low Quiescent Current – 4 mA active, 0.5 mA shutdown
- 50 dB PSRR – At 1 kHz for clean audio
- JST-PH Audio Input – No-solder STEMMA connection (ground-referenced, not differential)
- Filterless Design – Ferrite bead + capacitors on output
Ideal For
- Battery-powered audio projects
- Portable speakers and sound effects
- Interactive exhibits and installations
- Wearable audio devices
Package Contents
- 1× STEMMA Audio Amp breakout board (PAM8302)
- 1× Header strip
- 1× 3.5 mm screw terminal block for speaker connection
The Adafruit STEMMA Audio Amp - Mono 2.5W Class D - PAM8302 appears in the following collections:
