PAM8403 Mini Audio Amplifier Board 3W+3W Stereo Class D 5V Module for DIY Speakers

The PAM8403 is a high-performance, 3W per channel stereo Class-D audio power amplifier. It provides the efficiency of Class-D circuits with the high fidelity of much larger systems. Because it operates on 5V DC, it is perfect for portable applications—you can power it directly from a laptop USB port, a power bank, or a single Li-ion battery. Despite being the size of a postage stamp, it can drive two 4Ω or 8Ω speakers with ease.

Key Features ✨

• Ultra-Efficient Class D: High efficiency (over 90%) ensures the board doesn’t get hot, even during long playback sessions.

• Low Noise: Features high-quality signal processing to keep the “hiss” and “pop” noise at a minimum.

• Dual Channel Stereo: Delivers 3W + 3W of power, enough to fill a small room when paired with the right speakers.

• USB Power Compatible: Works perfectly with 5V power supplies, making it ideal for USB-powered desktop speakers.

• Breadboard Friendly: Simple pinout makes it easy to solder or use in a prototype.

Technical Specifications ⚙️

Feature	Specification
Operating Voltage	2.5V to 5.5V DC (Ideal: 5V)
Output Power	3 Watts + 3 Watts (Stereo)
Speaker Impedance	4Ω or 8Ω
Signal-to-Noise Ratio	90dB
Efficiency	>90%
Dimensions	21mm x 18mm x 3mm
Protection	Short-Circuit and Over-Temperature Protection

Perfect For: 🛠️

• DIY Bluetooth Speakers: Combine it with a Bluetooth module for a portable audio rig.

• Handheld Gaming: Add sound to GameBoy or Raspberry Pi Zero mods.

• Smart Home: Give your AI voice assistant or doorbell a clear voice.