Power filter board module emi AC rectifier HIFI audio noise reduction and anti-interference | Home Theater Amplifiers

Power filter board module emi AC rectifier HIFI audio noise reduction and anti-interference | Home Theater Amplifiers

EMI power filter board

Product introduction:

* PCB is silver-plated, with lower internal resistance and better conductivity;
* 2A and 5A, suitable for headphone amplifier, pre-amp, DAC decoder;
* 10A, 15A, 20A are suitable for high-power amplifiers.

The filter circuit is a two-stage X common mode Y differential mode filter circuit, which can effectively suppress and eliminate AC interference components. When used with a decoder, the sound is soft, the resolution is improved obviously, and the background is clean;

This filter board is made of high-quality components, including brand new custom flat copper inductors, professional XY2 common-mode filter capacitors, and military-standard FR4 silver-plated PCB boards;

This EMI filter board is used to purify the commercial power. During use, the components on the board may have high voltage from the mains. Please be careful not to touch the circuit board and its components at will to avoid electric shock.

Product parameters:

Size: 70×35×16mm

Weight: 28g

Input terminal: 220V AC (AC GND AC)

Output terminal: 220V AC

X2 Y2 capacitor: safety regulations

Separation of fixing hole: 3.5mm

Common mode inductance

Advantages of flat wire

Large current, small size, low DC resistance, ideal EMI effect, extremely small distributed capacitance, high insulation strength, and can extend the life of electrical appliances.

The high-frequency skin effect is good, and the unit current density is higher than that of round copper wire. It is wound by a fully automatic machine, single-layer winding, no overlapping, and good heat dissipation effect.
Closed magnetic circuit design, small magnetic leakage, good impedance balance and good conduction and radiation effect, and stable consistency.

Professional safety filter capacitor

The effect is better than the average French Thomson, Swiss RIFA and lower high frequency internal resistance.

Instructions for use:

*Power cords are the main way to interfere with incoming and outgoing equipment. Through power cords, interference from the power grid can enter the equipment and interfere with the normal operation of the equipment. The same interference generated by the equipment may also be transmitted to the power grid through the power cord. The normal operation of other equipment. Therefore, the ideal installation location is the power socket of the device, such as in front of the audio equipment transformer, in front of the switching power supply, and the power port on the back of the monitor.

Circuit board specifications and various interface definitions

Technology Introduction:

With the development of electronic technology, high-frequency electromagnetic interference problems such as high-power electrical appliances and switching power supplies have become extremely difficult problems in circuit interference. They interfere with each other and self-interference, causing the power supply to be polluted by high-frequency EMI, and the operation of the equipment is unstable. , If you repeat the problem, such as restarting frequently. Therefore, EMI filters are designed to improve this situation;

For high-frequency electromagnetic interference (EMI), there are usually three technologies for power supply filtering to suppress interference noise. In actual use, two or even multiple technologies are often mixed. They are:
1. Add a capacitor between the zero line of the power supply live line, that is, the X capacitor;
2. Add a capacitor between each power line and the ground line, that is, a Y capacitor;
3. Common mode suppression (suppression coils on two power lines).

The EMI filter we designed is a combination of the above three technologies. It allows low-frequency useful signals to pass smoothly, while suppressing high-frequency interference. Although the current is not large, only 2A (400W), 4A (800W), it is only suitable for devices with low working current but extremely high power requirements, such as low-power pre-stage, desktop CD, DAC decoder camera and other equipment Enter AC power for purification. It can suppress grid noise and high-order harmonics, noise and high-frequency harmonics generated by switching power supplies, motors, etc. Improve the purity of sound quality and reduce the noise caused by AC power interference.