25A EMI Power Filter Board Anti-interference AC Power Filter Power Supply For

Product descrtion:

Introduction of EMI power filter circuit: The circuit is composed of three parts, the first part is the differential mode filter part, the second part is the common mode filter circuit, and the third part is fuse, equped with a fuse holder. Replaceable fuses of different specifications. The internal circuit of the two-stage composite EMI filter, because of the two-stage (also known as two-section) filtering, so the effect of filtering noise is better. For some users, the problem of fast transient group pulse interference with a repetition frequency of several kilohertz can be suppreed. The specification is FR4 83X42X1.6MM, the shortest design of the high-current circuit, the path is short, it can withstand more current and le interference to the outside world. There are four specifications of common mode inductance: 2A, 4A, 15A and 25A. 2A common mode inductor filter. 4A common mode inductor filter 15A flat copper tape common mode inductor 25A flat copper tape common mode inductor and iron silicon aluminum differential mode inductor Note: 2A and 4A filters are equped with 5A fuses as standard, 15A and 25A filters are equped with 20A fuses as standard. This product is used in conjunction with the or power amplifier to filter high-frequency noise from the power supply, eliminate mains interference, and purify the power supply. It can significantly improve the sound quality of the power amplifier, increase the resolution, and make the background quiet. The input GND needs to be connected to the ground wire of the power , and at the same time it can be connected to the casing of the chais. Depending on the specific situation, please pay attention to the direction when soldering the 4A common mode inductor. Please connect according to the marking on the circuit board. The following is some common knowledge of high frequency electromagnetic interference EMI filter. For high-frequency electromagnetic interference (EMI), generally three techniques can be used for power supply filtering, which can suppre interference noise. In actual use, two or more of these techniques are often mixed. They are: 1. Add a capacitor between the live and neutral lines of the power supply, that is, the X capacitor. Choose X2 type, the main function is to eliminate common mode interference, the capacity range is 0.01UF --- 0.47UF. 2. Add a capacitor between the power line and the ground line, that is, Y capacitor. The Y2 type is selected to eliminate crotalk interference, and the capacity range is 2200pF ～ 0.1μF. In order to reduce the leakage current, the electric capacity should not exceed 0.1μF, this circuit board uses 3300PF. 3. Common mode suppreion, common mode inductance (suppreion s on the two power lines), when the rated current is large, the wire diameter of the common mode choke should also be increased accordingly, so as to be able to withstand larger currents. In addition, appropriate increase in inductance can improve low-frequency attenuation characteristics, this line uses 10MH. 4. Poor touch suppreion, poor touch inductance, and suppreion of series mode interference between power lines.

Package included:

1Pcs

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