Mini DC 5V 2 Channel 3W USB Digital Audio Amplifier

1. Working voltage: 2.5V-5.5V. Note: The power supply voltage should not exceed 5.5V, and the positive and negative connections of the power supply should not be reversed. 2. Speaker configuration: 4-8 ohms, recommended: 4 ohms; speaker power: 2-8W. 3. You can use the 5V power supply of the computer USB port, or use the 5V power supply of the USB port of the mobile phone charger, or use the lithium battery power supply. 4. 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 highly regarded in today's green trend. 5. 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 occupies a small volume. 6. 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. 7. Board size: ★★★★ Ultra-micro volume: 1.85*2.11cm ★★★★

product description:

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 positive and negative connections of the power supply should not be reversed.

2. Speaker configuration: 4-8 ohms, recommended: 4 ohms; speaker power: 2-8W.

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

4. 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 highly regarded in today's green trend.

5. 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 occupies a small volume.

6. 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.

7. Board size: ★★★★ Ultra-micro volume: 1.85*2.11cm ★★★★

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, then turn on the power, otherwise it will easily cause damage to the chip;

Since 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.

Tips:

Dear customer: This shop module is provided to electronic players with certain electronic knowledge to buy! And please carefully read the instructions for use in the product description or product introduction when purchasing the product. If you do not understand the product problem caused by the use, our company will not accept it. Please be cautious about the purchase of beginners.

Common customer problems:

1. Can the Mini Digital Power Amplifier Board 2*3W Class D be powered by a computer?

Answer: The power amplifier board can be powered by a computer, but it may produce noise (some customers have no noise). It is recommended to supply power independently.

2. Mini digital power amplifier board 2*3W Class D, is it good to use our speakers?

Answer: The speakers in this shop only provide DIY players for trial play. The sound effects are not particularly good. Customers who pursue high sound effects can purchase them separately.

3. Mini digital power amplifier board 2*3W Class D. Why does the speaker have noise after power-on?

Answer:

1. The howling sound should be introduced by the audio input line. Use shielded wire as the audio input line. Also, the audio input line should not be left in the air and the audio source should be connected.

2. Another reason may be that the power supply is not good and some switching power supplies cause great interference.

3. Try to lower the sound. It may also be that the audio signal input is too large and the signal is cut and limited.

Excellent noise suppression. When the input audio is not connected, the ears can not hear any noise. The dual-channel stereo, 5V power supply can output 3W+3W power, and it can directly drive 4Ω, 8Ω small speakers and output The power is large, the energy is sufficient, and the sound quality is good. The unique Class D digital power board without LC filter can be directly powered by the computer's USB. The double-panel wiring can properly solve the ground potential balance and the crosstalk between the channels caused by the wiring. The ultra-miniature design can be easily placed in the small internal space of various digital products, and the amplification efficiency is super high. All machines are used for the whole board welding, and the welding quality is comparable to non-manual iron welding!

Note: The "negative" of the left and right channel output terminals cannot be connected together, otherwise the IC will be burned, and the speaker (load) should be connected before power on.

Ultra-small size: 1.85*2.11cm

Rated working voltage 2.5-5V, limit working voltage 5.5V

Please note:

The "negative" output terminals of the left and right channels cannot be connected together, otherwise the chip will be burnt out, and the speaker (load) should be connected before powering on