2A 4A 10A 20A DC LC filter EMI electromagnetic interference filter EMC FCC safety high frequency filter

DC power filter circuit introduction: The circuit is composed of three parts, the first part is a first-level LC filter circuit, the second part is a common mode EMI filter, and the third part is a second-level LC filter circuit.

LC filter is generally called passive filter. It is a traditional DC power harmonic compensation device composed of inductors and capacitors. It can filter out the harmonics in the power supply single or multiple times. Purify the DC power supply

Common mode filtering. It can be used to suppress the problem of fast transient group pulse interference with a repetition frequency of several kilohertz in some user sites. 0

The PCB specification is FR4 42X77X1.6MM, the shortest design of the high current circuit, the short path, can withstand higher current, and have less interference to the outside world.

The inductors are available in four specifications: 2A, 4A, 10A, and 20A.

Input: DC does not exceed 50V (higher voltage can be improved by replacing electrolytic capacitors)

Output: DC.

Current: Choose to provide 2A.4A.10A.20A on demand

Specifications of main parts:

Circuit board: double-sided FR4 fiberglass board

Electrolytic capacitor: 50V 470UF consumption 2 PCS

Film capacitors: 100NF 2PCS 470 PF 1PCS

Magnetic ring inductance: 2PCS consumption, (20A high current select iron silicon aluminum),

Common mode inductance; 1PCS amount, (20A high current use flat copper strip inductance)

Socket: 7.62 socket 2PIN 3PIN 1PCS each

This module is suitable for eliminating the use of DC power supply with electromagnetic interference, and can be used in automobiles, motorcycles, and DC circuits with relatively strong electromagnetic interference.