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The PAM8403 5V Two-Channel Stereo Mini Class-D Audio Amplifier Board is a highly efficient power amplification breakout engineered to extract maximum volume from minimal power footprints. Traditional Class-AB analog amplifiers dissipate substantial energy as waste heat, demanding heavy metal heatsinks and draining portable batteries rapidly. This module relies on the high-efficiency Diodes Inc. PAM8403 Class-D switching core, converting input signals into pulse-width modulated (PWM) waveforms that achieve over 85% efficiency while remaining completely cool to the touch.

The chip incorporates an innovative filterless architecture, which means you can solder your speaker wires directly to the board's outputs without constructing bulky external Low-Pass LC filter networks. This slashes system weight and cost, delivering an exceptionally crisp audio frequency sweep. The small form factor allows the module to slip inside tight enclosures alongside microcontrollers (like an ESP32 or Arduino), transforming standard digital outputs into rich, room-filling sound.

Key Features & Benefits:

• Robust Dual-Channel Output: Pumps out a balanced 3W + 3W into standard 4Ω loads at a 5V input, delivering high volume despite its microscopic footprint.

• Filterless System Topology: Eliminates the need for heavy inductors and capacitors at the output stage, ensuring low distortion and an ultra-low noise floor ($THD+N$ below 0.1%).

• Exceptional Power Thrift: Its efficient power design reduces battery drain, keeping remote, battery-powered projects running significantly longer.

• Onboard Safety Mechanisms: Packed with integrated thermal shutdown logic and short-circuit protection circuits to insulate the core chip against accidental output overloads.

Technical Specifications

How to Wire and Use:

1. Power Supply (VCC & GND): Connect a stable 5V DC power source to the +5V and GND pads. Avoid exceeding 5.5V, as overvoltage can permanently damage the IC. Do not reverse the polarity.

2. Audio Input (L, G, R): Connect your audio source to the input pins. L is Left Channel, R is Right Channel, and G is the common Audio Ground.

3. Speaker Outputs (L+ / L-) and (R+ / R-): Connect your left speaker to the L+ / L- terminals and your right speaker to the R+ / R- terminals.

   Crucial Note: The outputs utilize a "Bridge-Tied Load" (BTL) configuration. Never connect the negative speaker outputs (L- and R-) together or ground them, as this will immediately burn out the amplifier IC.

Common Applications

Because of its incredibly small footprint and high thermal efficiency, this mini amplifier board is ideal for a wide range of portable and DIY projects:

• DIY Portable Bluetooth Speakers: Pair it with a 5V Bluetooth audio receiver module for a compact, battery-powered speaker.

• Handheld Gaming Consoles: Great for adding stereo sound to Raspberry Pi, Arduino, or ESP32-based retro gaming builds.

• Desktop & Laptop Mini Speakers: Build custom USB-powered multimedia computer speakers.

• Toy & Smart Appliance Audio: Integrated into interactive displays, robotic speech responses, and electronic toys.

• Jukebox & Arcade Projects: Perfect for space-constrained bartop arcade machines.

Package Includes

• 1 x PAM8403 5V Two-Channel Stereo Mini Class-D 3W+3W Audio Amplifier Board

Shipping & Delivery

At Electroboat Technologies, we ensure your components are delivered promptly and securely.

• Free Shipping: Enjoy Free Shipping on all orders above ₹999 across India.

• Dispatch Time: Your order will be carefully packed and dispatched within 1-3 business days.

• Estimated Delivery: Expect your package at your doorstep within 3-7 business days (depending on your specific location).

• Secure Packaging: We use specialized anti-static and cushioned packaging to ensure total safety and safe transit of all your sensitive electronic components.