PAM8403 5V Stereo Audio Amplifier Module

PAM8403 5V Stereo Audio Amplifier Module is a compact, high-efficiency audio amplifier board capable of delivering 3W+3W stereo output using a 5V power supply. Based on the PAM8403 IC, it is widely used in DIY audio systems, portable speakers, and embedded audio applications due to its excellent sound quality and low distortion.

Key Features:

• Dual Channel Output: Delivers 3W + 3W stereo power output at 5V.
• Low THD: Total Harmonic Distortion under 10% for clear audio reproduction.
• High Efficiency: Class-D amplifier design for minimal heat and high power efficiency.
• Ultra-compact Size: Ideal for small form factor and portable projects.
• Filterless Output: Simplified circuit reduces components and design complexity.

Technical Specifications:

• Operating Voltage: 2.5V to 5.5V DC (5V recommended)
• Output Power: 3W + 3W @ 4Ω, 5V, 10% THD
• Channel Configuration: Stereo (Left and Right)
• IC Used: PAM8403
• Efficiency: Up to 90%
• Frequency Response: 20Hz to 20kHz
• Signal-to-Noise Ratio: >90 dB
• Input Type: Stereo audio (left/right channels)

Mechanical Specifications:

• Board Dimensions: Approx. 21mm x 18mm
• Mounting: Solder or double-sided tape for DIY use
• PCB Type: Single-layer with pre-soldered headers (varies by variant)

Pinout Description:

• VCC: 5V DC Power Input
• GND: Ground
• L: Left Audio Input
• R: Right Audio Input
• OUTL+ / OUTL-: Left Speaker Output
• OUTR+ / OUTR-: Right Speaker Output

Mounting and Connection:

• Power Supply: Use regulated 5V power for best performance
• Speaker Connection: Connect 4Ω–8Ω speakers directly to output terminals
• Audio Input: Use AUX cable or soldered wires from audio source

Datasheet and Documentation:

• PAM8403 IC Datasheet (PDF)
• PAM8403 Module Application Guide

Applications:

• Portable Bluetooth Speakers: Compact solution for stereo output
• DIY Audio Systems: Custom speaker projects and upgrades
• Arduino Projects: Easily interface with audio sensors or sources
• Embedded Systems: Add stereo audio output to custom electronics
• Educational Kits: Used in sound module learning boards

Equivalent / Similar Modules:

• PAM8610: Higher power stereo Class-D amplifier (10W+10W)
• TPA3110: High-performance stereo amp module for 15W+ per channel
• LM386 Module: Basic low-power mono audio amplifier

Package Includes:

• 1 x PAM8403 5V Stereo Audio Amplifier Module