Speaking of the difficulty of switching power supply PCB Board cloning, Clone Printed Circuit Board EMI Layout is not a big problem, but it must be one of the difficulties of switching power supply to layout a sophisticated PCB board (the PCB design is not good, which may lead to debugging parameters in how to debug). The situation that comes out is not alarmist.) The reason is that there are still many factors in the PCB layout.
Such as: performance, process routing, safety regulations, EMC, etc.; among the factors considered, electrical is the most basic, but EMC is the most difficult to understand. The progress of many projects requires EMC issues for electrical hypertension;
Some products are difficult to deal with EMC at the source. Magnetic ring filtering can be used. Of course, the magnetic ring refers hereby has two meanings. On the one hand, it is the filter inductance of the input and output ends. The magnetic ring is made of different materials and the number of turns.
Clone Printed Circuit Board EMI Layout
There will be a corresponding effect. On the other hand, it means that the magnetic ring is directly placed on the input and output wires when Clone Printed Circuit Board EMI Layout. Sometimes it can be used for magic, but it can not be used in all situations, at least it can be used as a basis for judgment.
The blue and black lines in the above figure are the output positive and negative ends, and a magnetic ring is set on it, which solves the high frequency end caused by the output rectifier tube; sometimes the interference of the port may not be effective by adding a filter on the PCB board. Putting a magnetic ring on the line has an unexpected effect.
