PAM8403 audio amplifier - Class D, 2x 3 W, 5 V

Product overview

• Digital audio amplifier with Class-D technology, 2*3 W output power at 4 ohms
• 5 V operating voltage, two channels for stereo playback
• Input via 3.5 mm jack or alternate pin-header connection
• Very low power consumption due to the Class-D output stage, with low heat generation
• Compact assembly for building portable or mobile audio projects

Product description

This digital audio amplifier based on a PAM8403 IC delivers 2*3 W output power at 4-ohm speakers and operates directly with the standard operating voltage of 5 V. The Class-D output stage ensures that very little energy is lost as heat, making the module ideal for battery- or USB-powered projects.

The audio signal is supplied via a 3.5 mm jack socket or alternative solder pins and must be connected to an audio output of a microcontroller board, single-board computer, or sound card. The two output channels drive the speakers independently, with each channel providing a maximum of 3 W.

Applications include portable music playback from mobile phones or microcontroller boards, simple audio alarm systems, speech output in robotics projects, or adding audio playback to a single-board computer. For example, a sound module can be added to a motion detector to play a warning when triggered.

The speakers must have an impedance of at least 4 ohms. Signal input requires either an audio output with a standard level range (up to approximately 1 V) or the ability to generate direct PWM signals from the microcontroller. For battery-powered devices, the power supply should use a stable 5 V output.

Safety notice

This module is intended exclusively for building prototypes and for testing and development purposes. For continuous loads or higher currents, the power supply must be adequately dimensioned; overloading will cause damage. Work on or near power lines is reserved for qualified electricians.

Scope of delivery

• 1x PAM8403 audio amplifier, 2x 3 W, 5 V, Class D