PAM8403 Amplifier Board Class D 2x3w Ultra Miniature Digital Amplifier Board 2.5-5V USB Powered Green BoardItem NO.: SUNLEPHANT0001

PAM8403 Ultra Micro Digital Power Amplifier Board

Product Information:

Excellent noise suppression. When no input audio is connected, no noise can be heard even when the ear is close to the speaker. With dual channel stereo, 5V power supply can output 3W+3W power, which can directly drive 4 Ω and 8 Ω small speakers. The output power is large, the energy is sufficient, and the sound quality is good. Class D digital power board without LC filter can directly use USB power supply of computer. Double panel wiring can properly solve the ground potential balance and crosstalk between sound channels caused by wiring. The super micro design can easily be placed in the internal small space of various digital products, with amplification efficiency. The whole plate is welded by machine, and the welding quality is comparable to that of manual soldering iron!

Product Features:

1. Working voltage: 2.5V-5.5V. Note: The power supply voltage shall not exceed 5.5V, and the positive and negative power supply shall not be reversed.

2. Horn matching: 4-8 ohms, recommended: 4 ohms; Horn power: 2-8W.

3. You can use the 5V power supply from the USB port of the computer, or the 5V power supply from the USB port of the mobile phone charger, or the lithium battery power supply.

4. With high efficiency of 90%, it can provide 3W (left channel)+3W (right channel) output power under 4 Ω load and 5V power supply. The efficiency of Class A, Class B and other power amplifiers is only about 30%, and Class D power amplifiers are highly respected under the current green trend.

5. Class D power amplifier has high efficiency, does not affect the sound quality due to temperature rise, and does not need to add heat sink, so it occupies a small volume.

6. The power amplifier board has built-in noise elimination circuit, and there is no popping noise when the power is turned on/off; The module has short-circuit overcurrent protection and over temperature protection.

7. Board size: 1.85 * 2.11cm

Product Application:

● LCD TV, monitor

● Laptop

● Portable loudspeaker

● Portable DVD player, game console

● Mobile phone/handsfree phone

Precautions:

Turn on the speaker first and then the power supply, otherwise the chip may be damaged; 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.