Ultra -micro digital workplace 2*3W D class PAM8403 amplifier board 2.5 ～ 5V can be power supply

Excellent noise suppression. Without the input audio, the ears cannot hear any noise on the horn. Dual -channel stereo sounds, 5V power supply can output 3W+3W power, can directly drive 4Ω, 8Ω small speakers, output output, outputGreat power, sufficient energy, good sound quality.Unique LC -filtering D digital digital panel can directly use the computer's USB to power.Double -panel wiring, properly solve the ground potential balance caused by the wiring and the string between channels. Ultra -micro design can be easily placed in the internal small spaces of various digital products, and the efficiency is super high.All machines are used for tideline welding, and welding quality non -handmade soldering iron welding is comparable!

Product introduction: PAM8403 mini D class digital workplace
1. Work voltage: 2.5V-5.5V.Note: Do not exceed 5.5V of the power supply voltage, do not connect the power supply.
2. Toron use: 4-8 Euros, recommended: 4 Euros; speaker power: 2-8W.
3. You can use a computer USB port 5V power supply, or use the mobile phone charger USB port 5V power supply to power, or you can use a lithium battery power.
4. Under high efficiency 90%, 4Ω load and 5V power conditions, 3W (left channel)+3W (right channel) output power can be provided.The efficiency of amplifiers such as Class A and B is only about 30%. Class D power amplifier is highly respected under today's green trend.
5. The efficiency of the Different power amplifier is extremely high, and it will not affect the sound quality because of the temperature rise, and it does not need to add heat sinks, and the occupation volume is small.
6. The built -in noise circuit of the amplifier board, no noise is not cracked when the power supply is turned on/off; the module has short circuit flow protection and over -temperature protection.
7. Board size:

application:
LCD TV, monitor
Laptop
Portable speaker
Portable DVD player, game console
Mobile phone/free phone call

2. Precautions:
First connect the speaker and then connect the power, otherwise it will easily cause damage to the chip;
Because the digital volume control in the module has a great gain, do not allow the audio signal to enter too large and make the signal generate cutting limit.

Reminder: Dear customer: This shop module is provided for e -players with certain electronic knowledge to buy!And please read the instructions or product introduction in the description of the product carefully when buying the product. If we do not understand the product problems generated by us, we will not accept it. Please buy it carefully.

Common customer problems:

1. Can the mini digital workplace 2*3W D class can be used by computer?

Answer: The amplifier board can be powered by a computer, but it may produce noise (some customers do not have noise). It is best to recommend independent power supply.

2. Is the mini -type digital workplace 2*3W D type of horn in this shop is good?

Answer: Our speaker only provides DIY players to try it. The sound effect is not particularly good. If customers who are pursuing high sound effects can buy separately.

3. Mini -type digital workplace 2*3W D class. Why is there noise in the speaker after passing power?

Answer:
1. The screaming sound should be introduced by the audio input cable. The shielding line should be used to make the audio input cable, and the audio input cable should not be suspended to connect to the sound source.
2. It is still a reason that the power supply is not good. Some switching power supply is caused by great interference, which is caused by great interference.
3. Try to lower the sound, it may also be that the audio signal input is too large and the signal generates cutting limit.

优秀的噪声抑制，在没有接输入音频的情况下，耳朵贴着喇叭也听不到任何噪音，双声道立体声，5V 供电 即可输出3W+3W功率，可直接驱动4Ω、8Ω小音箱，输出功率大，能量足，音质好。独特的的无LC滤波的D类数字功板，可直接使用电脑的USB供电。双面板布线，妥善解决布线所引起的地电位平衡和声道间的串扰，超微型设计，可以很容易的放置在各种数码产品的内部小空间内，放大效率超高。全部采用机器进行整板焊接，焊接质量非手工烙铁焊接可比！

★★★★ Ultra -micro volume: 1.85*2.11cm ★★★★

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

Super small volume: 1.85*2.11cm almost a corner of the coin coin

Please note: The "negative electrode" on the left and right channels can not be connected together, otherwise it will burn the chip, and the speaker should be connected before power -on (load)

The rated work voltage is 2.5-5V, and the extreme work voltage is 5.5V