PAM8403 Amplifier Circuit Diagram:
The PAM8403 IC gives the quality of audio output with a lower voltage is about 5V DC. This class D PAM8403 Amplifier gives dual-channel stereo out which is 3w+3w and it works with 2.5v to 5v power supply. The Amplifier has high amplification efficiency 85%, it can drive 4 ohms/ 8 ohms, for small speakers. It has good sound quality and good noise suppression and can use for computer speakers with USB power supply directly without filtering. PAM8403 can be used as Head Phone Amplifier also.
PAM8403 Class D Audio Amplifier Circuit Diagram
PAM8403 Input audio should be via shielded wire for the best performance.
Use proper filtered power supply with good filter capacitors of PAM8403.
Take care not to short speaker wires else IC will get damaged.
Make sure the power supply never exceeds 5.5V else IC will get damaged. Use a regulated power supply.