The rapid development of large-scale integrated circuit technology has caused communication equipment manufacturers to put forward more miniaturization and compact assembly requirements for the entire power supply system device. Therefore, the program-controlled power supply system is changing from the traditional centralized power supply system to a distributed power supply system one by one. This new power supply system is a kind of power supply mode without power room, and power supply is scattered in various telecommunication equipment rooms. It has the advantages of low comprehensive investment, convenient expansion, easy maintenance, and low energy consumption. The distributed power supply system is developed on the basis of the development of high-frequency switch rectification technology, maintenance-free lead storage battery use technology and microcomputer digital control technology.

The high-frequency switch rectifier module is an important device in the distributed power supply system. It can reduce the volume with the increase of frequency, is light in weight, has low noise, and can be combined into a large-capacity rectifier by modules. The development of high-frequency switching rectifiers can not only promote the innovation of communication power systems, but also promote the development of power switching devices, magnetic materials, capacitor materials, and new circuit topologies and system control.

The high-frequency switching rectifier is a rectifier device, which is a high-frequency switching power supply device that converts alternating current (AC) into direct current (DC), and supplies it to the load after filtering. Its small size, high efficiency, easy to expand, move and install. Because the high-frequency switching rectifier has the advantages of small size, light weight, high conversion efficiency, stable output and easy adjustment, at present, high-frequency switching rectifiers are commonly used as their power supply and conversion devices in communication equipment.