PAM8403 2x3W Class D Stereo Audio Amplifier Board 2.5-5V Module

🔧 PAM8403 2×3W Class D Stereo Audio Amplifier Board | AuscomTech

This compact board is a miniature stereo power amplifier module based on the PAM8403 Class D amplifier IC.

It operates from 2.5V to 5V DC and can deliver up to 3W + 3W output at 5V with suitable small speakers.

Ideal for DIY speakers, portable audio projects, embedded sound systems, small powered enclosures, and low-voltage electronics builds.

⭐ Key Features

• Stereo Audio Output – provides independent left and right channel amplification for compact speaker projects.
• Efficient Class D Design – delivers strong output with low heat and reduced power consumption.
• Low-Voltage Operation – works from 2.5V to 5V DC for USB, battery, and regulated power applications.
• 3W + 3W Output – suitable for driving small 4Ω or 8Ω speakers when powered from a stable 5V supply.
• Filterless Output Circuit – non-LC design keeps the module compact and simple to install.
• Ultra-Compact PCB – approx. 18.5 × 21.1 mm size fits easily inside portable audio enclosures.
• Low Noise Performance – clean power and shielded audio wiring help reduce hiss, hum, and interference.

📊 Technical Specifications

• Amplifier IC: PAM8403
• Amplifier Type: Class D stereo audio amplifier
• Output Power: up to 3W + 3W at 5V
• Supply Voltage: DC 2.5V to 5V
• Maximum Supply Voltage: DC 5.5V
• Speaker Impedance: 4Ω or 8Ω
• Audio Input: left, right, ground
• Speaker Output: left speaker pair and right speaker pair
• PCB Size: approx. 18.5 × 21.1 mm
• Board Colour: Green

🧩 Typical Applications

• DIY portable speaker builds
• USB-powered mini speaker projects
• Arduino, ESP32, and Raspberry Pi audio output
• Small stereo sound systems
• Battery-powered audio devices
• Speaker repair and modification projects
• Embedded alarms, voice prompts, and notification sounds

⚠️ Important Notes

• Do not connect the left and right speaker negative outputs together.
• This board uses bridge-tied speaker outputs; each speaker must connect only to its own output pair.
• Connect speakers before applying power to help prevent amplifier damage.
• Do not exceed DC 5.5V input.
• A clean regulated power supply is recommended for best audio quality.
• USB power can be used, but poor-quality USB supplies may introduce noise.
• Speakers, power supply, audio cable, and audio source are not included.

📦 Package Includes

• 1 × PAM8403 2×3W Class D Stereo Audio Amplifier Board

🔗 Recommended Accessories (Not Included)

• 4Ω or 8Ω speakers – suitable output load
• 5V regulated power supply – stable amplifier power
• 3.5mm audio cable – connection to phone, PC, or audio source
• Hook-up wire – power and speaker wiring