This compact stereo amplifier module from DFRobot is based on the PAM8403 chip, delivering 3W per channel into 4Ω speakers with over 90% efficiency. It's a fully functional two-channel audio amplifier with an integrated sleep mode that can be controlled via a microcontroller.

Operating from 3.6–5.5V DC, the module is well-suited for battery-powered audio projects, portable speakers, and embedded sound systems where space and power efficiency are critical.

Key Features

• Stereo Output – Two independent 3W audio channels
• High Efficiency – Greater than 90% efficiency (Class D)
• Sleep Mode – Integrated low-power sleep function, controllable via pin
• Compact Size – Just 15.5 × 24mm
• PAM8403 Chip – Proven filterless Class D amplifier IC

Specifications

• Power Supply – 3.6–5.5V DC
• Output Power – 3W + 3W (4Ω load)
• Efficiency – >90%
• Board Size – 15.5 × 24mm
• Amplifier IC – PAM8403

Ideal For

• DIY portable speakers
• Embedded audio projects
• Arduino and microcontroller sound output
• Battery-powered audio applications

Package Contents

• 1× 3W mini audio stereo amplifier module

Resources

• DFRobot Wiki
• PAM8403 Datasheet (PDF)