The PAM8403 Digital Audio Amplifier is a compact and high-efficiency Class-D stereo amplifier module designed for audio amplification in Arduino, ESP32, DIY, and portable speaker projects.
Specifications:
Output Power: 3W + 3W Stereo
Operating Voltage: 2.5V – 5.5V DC
Recommended Voltage: 5V
Supports 4Ω and 8Ω speakers
High efficiency up to 90%
Compact mini module design
Features:
Clear and powerful sound output
Low power consumption
Minimal heat generation
Built-in short circuit and thermal protection
Ideal for battery-powered applications
Applications:
DIY Bluetooth speakers
Arduino and ESP32 audio projects
Portable speaker systems
MP3 and multimedia projects
Robotics and alarm systems
Pin Configuration:
Audio Input:
L → Left Audio Input
R → Right Audio Input
GND → Ground
Power Input:
VCC → 5V
GND → Ground
Speaker Output:
L+ / L-
R+ / R-
Important Notes:
Do not connect speaker outputs directly to GND.
Use a stable 5V power supply for best performance.
Recommended for use with 4Ω or 8Ω speakers.
