Upgrade your DIY audio projects with this compact and efficient PAM8403 Audio Amplifier Board. Designed with the PAM8403 chip, this Class-D digital amplifier delivers powerful sound (2x3W) in a miniature form factor. It features a built-in potentiometer with a switch, allowing for easy volume control and power management. Perfect for USB-powered speakers, portable radios, and custom sound systems.

Key Features:

• High Efficiency Class-D: Delivers 3W + 3W output power with high fidelity and low noise.
• Integrated Controls: Comes with a high-quality potentiometer for smooth volume adjustment and a built-in power switch (turn counter-clockwise to shut down).
• Flexible Power: Operates on DC 2.5V to 5.5V. Can be easily powered via a computer USB port or a 5V power bank.
• Compact Design: Ultra-small footprint (approx. 28mm x 20mm) fits into tight enclosures.
• Superior Filtering: Equipped with a solid-state filter capacitor for stable performance and clear audio output.

Technical Specifications:

• Chip: PAM8403 (Class D)
• Operating Voltage: DC 2.5V - 5.5V (Recommended 5V)
• Output Power: 3W x 2 (at 4Ω load)
• Speaker Impedance: 4Ω - 8Ω (4Ω recommended)
• Dimensions: 29.5mm x 20.2mm x 15mm (excluding potentiometer handle)
• Protection: Current limit and thermal protection.

Application Note:

• Ensure the power supply voltage does not exceed 5.5V to prevent chip damage.
• The "Negative" outputs of the Left and Right channels should not be connected together; they must be connected directly to the speaker terminals.