Giới thiệu toplanswatchstore 2.5-5V Miniture Mini Digital Audio Amplifier Board 2x3W PAM8403 Class D Speaker Module USB Power Supply 2.5 To 5V VN

Specification:
New and high quality
Product introduction: PAM8403 mini Class D digital power amplifier board
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 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
Applications: LCD TV, monitor, laptop, portable speaker, portable DVD player, game console, mobile phone/handsfree phone
Color: as shown in the figure
Package Included：1Pc

Note:
Please refer to the measurement. Tiny measuring error is allowable in normal range.
As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.