4A 10A 20A three-stage EMI EMC Power Filter Board Module EMI Filter AC Mains Purification HiFi Audio Noise

three-stage audio amplifier EM1 power filter

Input voltage: single-phase AC 110--250V

Output voltage: single-phase AC 110--250V

Load rated current: 4A--20A

Input port: three-wire 7.62 socket input

Output port: 2-wire 7.62 socket output

Design features.

1). One-stage differential mode filtering, two differential touch inductors, differential mode filtering of AC power supply to suppress medium and high frequency interference

3) One-level common-mode filtering, through X2 capacitors and common-mode inductors, combined into common-mode filtering.

4) Three-stage common mode filtering, due to the use of two-stage (also known as two-section) filtering, so the effect of noise filtering better. For some users there are repetitive frequencies of several kilohertz

The problem of fast transient group pulse interference, can play a suppression role.

Main parts selected.

2 capacitors: Germany Simon 0.22UF3PCS

Y2 capacitor: 275V3300PF2PCS

Differential mode inductor: 47UH2PCS

Common mode inductor: 2PCS

Resistor: 1PCS

Socket: 7.622PIN3PIN1PCS each

Three-stage composite (1-stage differential mode + 2-stage common mode) EM1 EMI filter circuit, due to the use of three-stage (also known as three-section) filtering, so the filtering of noise is more effective.

For some user sites there is a repetition frequency of several kilohertz of fast transient group pulse interference, can play a suppression role.

This module with decoder use or amplifier use, can filter the power DC component, eliminate and suppress transformer hum, high-frequency noise in the power supply, purify the power supply, can Significantly improve the sound quality of the amplifier, enhance the resolution and make the background quiet. The input GND needs to be connected to the ground of the power line, but also can be connected to the chassis shell again, depending on the circumstances.