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PAM8403 2.5-5v Super mini digital power amplifier board
Specificatii:
1. Working voltage: 2.5V-5.5V. Note: The power supply voltage should not exceed 5.5V, and the positive and negative power supply should not be reversed.
2. Speaker matching: 4-8 ohms, recommended: 4 ohms; speaker power: 2-8W.
3. You can use the computer's USB port 5V power supply, or use the mobile phone charger's USB port 5V power supply, or you can use lithium battery power.
4. With high efficiency of 90%, 4Ω load and 5V power supply, it can provide 3W (left channel) + 3W (right channel) output power. The efficiency of Class A and B amplifiers is only about 30%, and Class D amplifiers are highly respected under the current green trend.
5. Class D amplifiers have extremely high efficiency, will not affect the sound quality due to temperature rise, and do not need to add a heat sink, occupying a small volume.
6. The built-in noise canceling circuit of the power amplifier board, no noise when the power is turned on / off; the module has short circuit overcurrent protection and over temperature protection.
7. Board size: 21 * 19 (mm)
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