PAM8403 5V Mini Two-Channel Stereo 3W Class-D Audio Amplifier

The PAM8403 5V Two-Channel Stereo Audio Amplifier Module is a high-efficiency, 3W Class-D audio power amplifier designed for compact digital products. Utilizing a filterless architecture, this mini amplifier board drives speakers directly without the need for bulky low-pass LC filters. This not only reduces system costs and saves valuable PCB area but also results in high-quality sound reproduction with minimal interference.

High Efficiency for Portable Projects

Engineered for longevity in battery-powered applications, the PAM8403 offers significantly higher efficiency compared to traditional Class-AB amplifiers. It can achieve an efficiency rating of up to 87%, effectively extending battery life in portable gadgets. The module is capable of delivering 3W+3W of power into a 4Ω load when powered by a 5V source, making it powerful enough for DIY game machines, headsets, and small speaker systems.

Low Noise and Robust Protection

This “Super Mini” module features double-panel wiring, which specifically addresses and solves crosstalk issues between channels. It boasts superior low-noise performance and is protected by integrated short-circuit and thermal shutdown circuitry. Its low EMI (Electromagnetic Interference) design and ability to run directly off a computer’s USB power supply make it a favorite for makers working with Arduino, Raspberry Pi, or Bluetooth audio projects.

Key Features

• Filterless Class-D Architecture: Drives speakers directly, reducing cost and footprint.

• Dual Channel Stereo: Delivers 3W + 3W output at 5V with a 4Ω load.

• USB Power Compatible: Operates within the 2.5V to 5.5V range, perfect for USB power sources.

• Excellent Audio Quality: Features low THD+N and superior low-noise characteristics.

• Built-in Protection: Includes thermal shutdown and short-circuit protection for added durability.

• Compact Design: Ultra-small dimensions allow for easy integration into tight enclosures.

Technical Specifications

Typical Application Scenarios

• Portable Audio: DIY Bluetooth speakers and handheld music players.

• Robotics: Adding voice or sound effect capabilities to autonomous bots.

• Gaming: Sound systems for retro arcade machines or Raspberry Pi handhelds.

• Commercial Electronics: Audio for LCD monitors, TV projectors, and speakerphones.

Package Includes

• 1 x PAM8403 Mini 3W+3W Digital Power Amplifier Board

Important Product Disclaimer

Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. Product images are shown for illustrative purposes only and may differ from the actual product.

Note

Wiring Tip: To achieve the best sound quality and prevent interference, use shielded wire for the audio input. Additionally, ensure the left and right channel “negative” outputs are not connected together, as the PAM8403 uses a bridge-tied load (BTL) configuration; connecting them can damage the IC.