Description:
This Audio Amplifier Module is based on the PAM8403 chip, a high-efficiency 3W+3W stereo Class-D audio amplifier. Thanks to its low Total Harmonic Distortion plus Noise (THD+N) and innovative filterless architecture, this module ensures high-quality audio playback without the need for external low-pass filters—minimizing component count and saving PCB space.
Its superior efficiency over traditional Class-AB amplifiers makes it ideal for battery-powered and portable applications, extending device runtime without compromising sound quality.
Features:
Dual-channel stereo output: 3W + 3W
Works with a 2.5V to 5.5V power supply (USB compatible)
High amplification efficiency (up to 87%)
Drives 4Ω or 8Ω small speakers directly
No LC filter needed — Class-D digital power board
Small form factor (just 21mm x 18mm) fits easily into compact devices
Good sound quality with strong noise suppression
Suitable for USB-powered audio projects
Technical Specifications:
Operating Voltage: 2.5V – 5.5V DC
Maximum Output Power: 3W x 2 (Stereo)
Max Gain: 24 dB
Current Consumption: 80mA
Efficiency: Up to 87%
Signal-to-Noise Ratio (S/N): 80 dB
Power Supply Rejection Ratio (PSRR): -58 dB
Compatible Load: 4Ω or 8Ω speakers
Dimensions: 21mm x 18mm x 3mm
Weight: 5g
Amplifier IC: PAM8403
Usage Notes:
Use shielded audio cables for input to reduce noise.
Always use a regulated and filtered power supply.
Do not exceed 5.5V input voltage—doing so may damage the IC.
Avoid short-circuiting the speaker output terminals.
Applications:
USB-powered audio amplifiers
DIY speaker projects
Portable music players
Educational electronics projects
Embedded audio systems
Disclaimer:
Product details, specifications, and colors may change from time to time without prior notice depending on batch updates or improvements.
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