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It  is simple pam8406 ic amplifier circuit design.

The PAM8406 PCB project involves designing a compact audio amplifier board using the PAM8406 chip, a 5W Class-D stereo amplifier. Ideal for low-power audio applications, the circuit operates from a 2.5V–5.5V supply and offers low distortion with high efficiency. The design includes decoupling capacitors, a low-pass filter for output smoothing, and volume control using a potentiometer. Its minimal heat dissipation allows operation without a heat sink. This project is suitable for DIY Bluetooth speakers, toys, and embedded audio systems, offering clear stereo output with simple component requirements and minimal PCB space. It's an excellent choice for beginner audio projects.