PAM8403 5V Stereo Audio Amplifier Module

PAM8403 5V Two-channel Stereo Mini Class-D Audio Amplifier is a compact, efficient, and low-distortion amplifier module ideal for DIY audio projects, portable speakers, and embedded systems. It operates on a 5V supply and delivers up to 3W per channel into a 4-ohm load. Its Class-D architecture ensures minimal power loss and efficient heat dissipation without the need for a heatsink.

Key Features of PAM8403 5V Stereo Mini Audio Amplifier:

• Class-D Efficiency: High efficiency with low heat output, suitable for battery-powered applications.
• Stereo Output: Dual-channel output for left and right speaker connections.
• Low THD: Total Harmonic Distortion is under 10% at full power, ensuring clear sound.
• Overcurrent and Thermal Protection: Built-in safeguards for long-term reliability.
• Ultra-compact Module: Small PCB size for easy integration into custom enclosures.

Technical Specifications of PAM8403 Module:

• Chipset: PAM8403
• Supply Voltage: 2.5V to 5.5V DC
• Output Power: 3W + 3W (at 4Ω, 5V, 10% THD)
• Channel Configuration: Stereo (L & R)
• Frequency Response: 20Hz to 20kHz
• Efficiency: Up to 90%
• THD+N: < 10%

Mechanical Specifications of PAM8403 Module:

• PCB Dimensions: 21mm x 18mm (approx.)
• Mounting: Pre-drilled PCB holes for simple mounting
• Connector Type: Solder pads for input, output, and power
• Weight: Approximately 2g

Dimensions:

• Length: 21mm
• Width: 18mm
• Height: 3mm (approx.)

Mounting Options:

• Chassis Mount: Can be mounted in enclosures using screws or adhesives.
• Breadboard Testing: Suitable for prototype use with jumper connections.

Schematic Diagram, Connection, Wiring and Pinout of PAM8403 Module:

• Power: VCC (5V) and GND pins for power supply
• Inputs: L-IN and R-IN for left and right audio signals
• Outputs: L-OUT+ / L-OUT− and R-OUT+ / R-OUT− to connect to stereo speakers
• Volume Control (optional): Some modules include an onboard potentiometer

Datasheet of PAM8403 Audio Amplifier:

• Download PAM8403 Datasheet (PDF)

Applications of PAM8403 5V Stereo Mini Audio Amplifier:

• Portable Speakers: Build compact stereo speakers with USB or battery power.
• Embedded Audio: Suitable for Arduino, Raspberry Pi, and other microcontroller projects.
• DIY Headphone Amps: Power-efficient stereo headphone systems.
• Bluetooth Speaker Systems: Integrate with Bluetooth receivers for wireless audio playback.
• Computer Sound Systems: Used in USB-powered desktop audio projects.

Equivalent of PAM8403 5V Stereo Mini Audio Amplifier:

• TPA3110D2: 15W per channel stereo amplifier for higher power needs
• LM386: Analog mono amplifier alternative for low-power audio
• MAX9744: Digital Class-D amp with onboard gain control
• NS8002: Mono Class-D audio amplifier for 5V operations

Package Includes:

• 1 x PAM8403 5V Two-channel Stereo Mini Class-D Audio Amplifier Module