PAM8403 is an amplifier board that can be powered using a simple 5V input and could drive two 3W + 3W stereo speakers. It is an excellent choice for anyone who wants a Class-D stereo audio amplifier in a small board space. This amplifier allows the user to achieve high-quality audio reproduction from a stereo input. Additionally, it has a special feature: it can drive speakers directly from its output.

Features:

• Operating Voltage: Wide power supply ranges from 2.5V to 5.5V DC
• Dual-channel stereo with high output power (3W+3W Output at 10% THD with a 4° Load at 5 volts DC)
• Max Gain: 24 dB.
• Filterless architecture
• Low Quiescent Current and Low EMI
• Operating Temperature: -40 to +85°C
• Short Circuit Protection
• Thermal Shutdown
• Superior Low Noise
• Efficiency up to 90%

The PAM8403 amplifier board is a dual-channel (stereo) amplifier that produces 6W (3W+3W) output. As any major amplifier system needs to have short circuit protection, PAM8403 has inbuilt short circuit protection that is essential for trouble-free operations. The PAM8403 amplifier IC itself does not require any kind of heat sink, so this will be a perfect choice for custom speaker projects. It can directly drive 4Ω or 8Ω speakers. It is mandatory to use a proper speaker with no more than a 3W output rating.

As this is a stereo amplifier board, the input section has two inputs, L (left) and R (right), with a common ground in between them. Use any kind of audio input that needs to be amplified, and it will produce 3W + 3W of audio output.

This amplifier module provides a maximum gain of 24 dB with 10% THD at 5V DC input and 4 Ohms load output. It does not require a heatsink, which also saves additional board space. Irrespective of the heatsink, it could also provide thermal protection, which is another essential feature for such a small-wattage amplifier module.

Datasheet: https://components101.com/sites/default/files/component_datasheet/PAM8403-Audio-Amplifier-Datasheet.pdf