PAM8403 Mini Class D Amplifier Board 2×3W USB Powered 5V
PAM8403 Mini Class D Amplifier Board 2×3W USB Powered 5V
PAM8403 Ultra-Mini Class D Digital Amplifier Board – 2×3W, USB Powered
Upgrade your DIY audio projects with the PAM8403 Ultra-Mini Digital Amplifier Board. Powered by the highly efficient PAM8403 Class D chipset, this compact stereo amplifier board delivers 2×3W of clean, clear audio output with up to 90% power efficiency — meaning less heat, longer runtime, and better sound from a tiny footprint. Whether you're building a custom speaker, repurposing old drivers, or prototyping an audio circuit, this board is an excellent choice.
Made in Mainland China.
Key Features
- Class D Efficiency: Up to 90% power efficiency for minimal heat generation and maximum audio output
- Dual Channel Stereo: 2×3W output for true left and right channel audio
- Wide Supply Voltage: Operates from 2.5V to 5.5V — compatible with standard USB (5V) power sources
- Ultra-Compact SMD Design: Tiny form factor makes it ideal for space-constrained builds and embedded projects
- Wide Operating Temperature: Functions reliably from -40°C to +85°C for demanding environments
- No High-Concern Chemicals: Clean and safe for hobbyist and professional use
- Plug-and-Play Simplicity: Easily powered via USB — no complex power supply needed
Technical Specifications
| Chipset | PAM8403 |
| Output Power | 2 × 3W |
| Amplifier Class | Class D |
| Supply Voltage | 2.5V – 5.5V |
| Power Efficiency | Up to 90% |
| Operating Temperature | -40°C to +85°C |
| Package Type | SMD |
| Quantity | 1 Board |
| Origin | Mainland China |
Perfect For
- DIY Bluetooth speakers and audio systems
- Raspberry Pi and Arduino audio output circuits
- Computer speaker modifications
- Portable battery-powered speaker builds
- Electronics hobbyists and makers
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Learn more: ENERGY STAR product efficiency guidance
Frequently Asked Questions
Q: What voltage does the PAM8403 amplifier board require to operate?
A: The PAM8403 mini digital amplifier board operates on a supply voltage of 2.5V to 5.5V, making it perfectly compatible with a standard 5V USB power source. This makes it extremely convenient for desktop, portable, and microcontroller-based projects.
Q: What is the audio output power of this amplifier board?
A: This board delivers 2×3W of stereo output power — one 3W channel for the left speaker and one 3W channel for the right speaker. The Class D design ensures this power is delivered with up to 90% efficiency, so heat is minimal even during sustained use.
Q: Is this amplifier board suitable for Arduino or Raspberry Pi projects?
A: Yes! The PAM8403 board is a popular choice for Arduino, Raspberry Pi, and other microcontroller-based audio projects. Its low operating voltage (as low as 2.5V) and compact SMD form factor make it easy to integrate into custom enclosures and breadboard prototypes.
Q: What types of speakers can I connect to this board?
A: The PAM8403 amplifier board is compatible with standard 4Ω or 8Ω passive speakers. It is commonly used to drive small bookshelf-style speaker drivers, DIY speaker cones, and salvaged computer speakers in hobbyist builds.