PAM8403 Stereo 3w+3w Audio Amplifier module
Mini digital Audio Amplifire Board
Specifications:
Operating voltage: 2.5V-5.5V
Maximum output power: 3W+3W (5V 4Ω)
Power Supply: DC 2-5.5V
Speaker: 4 Ω (Recommended)
Note: Please make sure the power supply is not more than 5.5V and please make sure the polarity for "+" and "-", or else, it will burn the IC or Board. The left and right channel output of the "negative" cannot be together, otherwise it will burn the IC and energized speaker (load) connected before.
Tips: This module power supply should be clean and have enough power, input supply voltage can provide 1A or more current, otherwise blocked due to insufficient power supply sound ; such as a computer USB port power supply , the power supply can be connected to both ends 470UF electrolytic capacitors, otherwise there will be noise !
