2 Channel Digital Power Amplifier Module , Amplifier Board Module Pam8403

Our amplifier modules can be customized with customer requests,which have wide applications.ODM/OEM services offered! welcome to inquire me for more details!
Excellent noise suppression, without receiving input audio, the ear can not hear any noise when it is attached to the speaker. Two-channel stereo, 5W power supply can output 3W+3W power, can directly drive 4Ω, 8Ω small speaker, output Power is high, energy is enough, and sound quality is good. The unique LC-free D-class digital work board can be directly powered by the computer's USB. Double panel wiring, properly solve the ground potential balance caused by wiring and crosstalk between channels, ultra-miniature design, can be easily placed in the internal small space of various digital products, the amplification efficiency is super high. All the machines are used for whole board welding, and the welding quality is not comparable to that of manual soldering iron!
Product introduction: PAM8403 mini class D digital power amplifier board
1. Working voltage: 2.5V-5.5V. Note: The power supply voltage should not exceed 5.5V, and the power supply should not be reversed.
2. Speakers: 4-8 Euro, recommended: 4 Euros; Speaker Power: 2-8W.
3. It can be powered by the computer's USB port 5V power supply, or by using the mobile phone charger USB port 5V power supply, or you can use the lithium battery power supply.
4. High efficiency 90%, 4W load and 5V power supply, 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 is highly regarded under the current green trend.
5. Class D power amplifiers are extremely efficient, do not affect the sound quality due to temperature rise, and do not need to add heat sinks, occupying a small volume.
6. The power amplifier board has a built-in noise canceling 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.
7.board size:ultra-micro volume(18.5*21.1mm)
application:
LCD TV, monitor
laptop
Portable speaker
Portable DVD player, game console
Mobile 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;
Since the digital volume control in the module has a large gain, do not let the audio signal input be too large to cause the signal to cut and limit.
Customer FAQ:
1. Mini digital power amplifier board 2*3W Class D can be powered by computer?
Answer: The power amplifier board can be powered by a computer, but it may produce noise (some customers have no noise), so it is recommended to supply power independently.

2, mini digital power amplifier board 2 * 3W D class Why does the speaker have noise after power-on?
answer:
3, there is a howling sound, should be introduced by the audio input line, should use the shielded line to do the audio input line, and the audio input line should not be left floating to connect the sound source.
4, or a reason may be that the power supply is not good, some switching power supply interference is very large, caused by.
5. Try to lower the sound. It may also be that the audio signal input is too large and the signal is cut and limited.
Note: The “negative” of the left and right channel outputs cannot be connected together, otherwise the IC will be burned and the speaker (load) should be connected before power-on.
Ultra-small volume: 1.85*2.11cm almost the size of a dime coin
Rated working voltage 2.5-5V, limit working voltage 5.5V