You can use the 5V power supply of the computer USB port, or use the 5V power supply of the mobile phone charger USB port, or use the lithium battery power supply.
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High efficiency 90%, 4Ω load and 5V power supply conditions, can provide 3W (left channel) +3W (right channel) output power. The efficiency of class A and class B power amplifiers is only about 30%, and class D power amplifiers are better
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Class D power amplifier has extremely high efficiency, will not affect the sound quality due to temperature rise, and does not need to add a heat sink, which takes up a small volume.
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The power amplifier board has a built-in noise elimination circuit, and there is no noise when the power is turned on/off; the module has short-circuit over-current protection and over-temperature protection.
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Board size: 21*19 (mm)
Application
LCD TV, monitor laptop Portable speaker Portable DVD player, game console Cell phone/hands-free phone
Precautions for use
Turn on the speaker first and then turn on the power, otherwise it will easily damage the chip; Because the digital volume control in the module has a great gain, don't let the audio signal input too large and cause the signal to be cut and limited.
