PAM8403 digital power amplifier green board

Product Description: PAM8403 Mini Class D Digital Power Amplifier

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 connected in reverse.

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

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

4. High efficiency 90%. Under the condition of 4ω load and 5V power supply, it can provide 3W (left channel) +3W (right channel) output power. The efficiency of Class A, 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, which won't affect the sound quality because of temperature rise, and it doesn't need to add heat sink, so it takes up a small volume.

Application:

Tv, monitor

laptop

Portable speaker

Portable DVD player, game machine

Mobile phone/hands-free phone

2. Precautions for use:

Turn on the speaker first and then the power supply, otherwise it will easily damage the chip;

Because the digital volume control in the module has a great gain, so don't let the audio signal input be too large to cause the signal to be cut and limited.

3. Wiring diagram:

Pam8403 digital power amplifier board red board

Power supply: DC 1a (DC): 5V

Output power: 3W + 3W (4 Ω)

Signal to noise ratio: 90dB

Efficiency: > 90%

Size: 24 * 15.5 * mm positioning hole size: spacing 20mm aperture: 2mm

Precautions:

1: The positive and negative poles of the power supply shall not be connected reversely, and the power supply voltage shall not exceed 5.5V. These two violations will cause IC damage.

2: There is a high gain buffer in the chip, and any component parameters on the board cannot be changed. Unqualified parameters will cause IC damage.

3: The input line should be shielded as far as possible, which can play an anti-interference role and eliminate clutter current sound.

4: The output is CMOS tube BTL driving mode. The negative poles of the left and right horns cannot be connected together, that is, the four wires connected to the horn are completely independent and cannot be connected together!

Pam8403 5V mini power amplifier

Pam8403 is a small digital power amplifier chip. The high-definition sound quality highlights the advantages of the digital chip. The circuit adopts reasonable peripheral configuration. The power filter is upgraded to 470uf (some sellers have less than 100uF or even no capacitor) 1.6mm glass fiber plate. The power amplifier board is meticulous and outputs 3W + 3W high fidelity sound quality. It is a good product for power amplifier enthusiasts. The potentiometer adopts the original anti body, and the service life can reach 15 years, Potentiometer with switch can directly cut off the power supply when it is reversible. It has been highly praised by buyers since it came into the market!

Product Name: pam8403 digital power amplifier board

Specification and model: xtw8403

Power supply range: 5V DC

Output: 3W * 2

Appearance dimension: 29.5 * 20.2 * 15mm (excluding protruding potentiometer rod)