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Audio Amplifier Module Board 2x 3w Class D 5v Power Amplifier PAM8403

Audio Amplifier Module Board 2x 3w Class D 5v Power Amplifier PAM8403

The PAM8403 is a compact, high-efficiency Class-D stereo audio amplifier module capable of delivering up to 3W per channel. It is ideal for portable audio applications, hobbyist projects, and DIY speaker systems. With a supply voltage range of 2.5V to 5.5V, this module can be conveniently powered using a USB port, mobile charger, or battery pack. The chip operates without the need for output filters or capacitors, enabling direct connection to standard loudspeakers.

Package Includes:

  • 1 × PAM8403 2×3W Class-D Digital Audio Amplifier Module

4.20 AED 4.20 AED Tax Included
4.20 AED Tax Included

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Features:

  • Amplifier Chip: PAM8403 Class-D stereo amplifier
  • Power Output: Up to 3W per channel (with 4Ω speakers at 5V)
  • Supply Voltage: Operates from 2.5V to 5.5V (typical 5V via USB or battery)
  • Speaker Support: Supports 4Ω–8Ω speakers (4Ω recommended)
  • Compact Size: Fits into small enclosures or embedded systems
  • Filterless Design: Direct drive capability without the need for output filters
  • Highly Efficient: Class-D operation minimizes heat and power loss

Specifications:

  • Product Name: Miniature Digital Power Amplifier Board
  • Chipset: PAM8403
  • Operating Voltage: 2.5V – 5.5V
  • Output Power: 2 × 3W (at 5V, 4Ω)
  • Speaker Impedance: 4Ω–8Ω (Recommended: 4Ω)
  • Speaker Power: 2W–8W
  • Board Dimensions: 1.85 cm × 2.11 cm
  • Main Color: Green PCB, Silver Tones

Pinout Description:

  • 5V: Connect to +5V power supply
  • GND: Connect to power ground
  • Out R: Right speaker output (+ and – terminals)
  • Out L: Left speaker output (+ and – terminals)
  • L - R: AUX input terminals (L = Left, R = Right, – = GND)

Applications:

  • Portable Bluetooth speakers
  • DIY stereo projects
  • Computer or Raspberry Pi audio output booster
  • Embedded systems and microcontroller audio output

Wiring Instructions:

  1. Connect the speaker terminals carefully – make sure to match + and – for both left and right channels.
  2. Connect the audio input (AUX) to the L, R, and GND pins.
  3. Connect the power source last – either USB 5V or a regulated 3.7V–5V battery pack.

Important Notes:

  • Do not power the board before connecting the speakers – doing so may damage the PAM8403 chip.
  • Keep audio input levels within range – the internal gain of the amplifier is high, and excessive input can cause distortion or clipping.