How to achieve better EMI control technology in power design?

What is the typical method of solving EMI related issues in power? First, determine that EMI is a problem. This seems to be very obvious, but it may be very time consuming because it needs to use the EMI test room (not everywhere) to quantify the electromagnetic energy generated by the power source and determine if the electromagnetic energy is in line with the system. EMI standard requirement. It is assumed that the power will bring EMI issues, and the designer will face the process of reducing EMI through a variety of traditional correction strategies, including: High efficiency is achieved in the small board space as much as possible. Good thermal performance. Layout Optimization: Careful power supply layout is equally important to select a suitable power component. Successful layout depends widely on the level of experience of power designers. The layout optimization is essentially an iterative process, and experienced power designers help maximize the number of iterations, thereby avoiding delays and extra design costs. The problem is: Internal personnel often do not have these experiences. Buffer: Some designers will plan a placeholder area in advance and provide a simple buffer circuit (from a simple RC filter from switching switch node to GND). This can suppress the ringing phenomenon of switching the switch node (a factor for generating EMI), but this technique can result in an increase in loss, thereby negative impact on efficiency. Reduce the edge rate: Reduce the ringing rings of the switching switch node can also be implemented through the lowering rate of the gate. Unfortunately, it is similar to the buffer, which will have a negative impact on the efficiency of the entire system. Frequency (SSFM): Many Adi's Power By Linear switching switch regulator has this characteristic, which helps product design through strict EMI test standards. The SSFM technology is used to modulate the clock of the drive switching switch frequency within known range (such as a change range of the programming frequency fsw up and down). This helps to assign peak noise energy into a wider frequency range. Filters and shields: Filters and shields always occupy a lot of costs and space. They also complicate production. All of the above constraints can reduce noise, but they also have defects. Maximize the noise in the power design is usually thoroughly solved, but it is difficult to achieve. The Silent Switcher 2 regulator of Adi implements low noise in the regulator side, thereby eliminating additional filtering, shielding or large layout iteration. It is not necessary to use expensive countermeasures to speed up the product listing time and saves a lot of cost.

Our other product:

Professional lightning protection system for Tower	Professional FM Radio Station Equipment Package	FMUSER FU-1000C 1000W FM Transmitter With USB Audio Input Interface
FMUSER 200W FM Radio Broadcasting Package	Hotel IPTV Solution	FMUSER FSN-1000T V5.0 1KW FM Radio Broadcast Transmitter