Brief introduction of power module

The power module is a power supply that can be directly mounted on a printed circuit board. Its characteristics are that it can be an application-specific integrated circuit (ASIC), digital signal processor (DSP), microprocessor, memory, field programmable gate array (FPGA) ) And other digital or analog loads to provide power. Generally speaking, this type of module is called a point-of-load (POL) power supply system or a point-of-use power supply system (PUPS). Due to the many advantages of the modular structure, the modular power supply is widely used in switching equipment, access equipment, mobile communications, microwave communications, optical transmission, routers and other communications fields, as well as automotive electronics, aerospace, and so on.

Especially in recent years, due to the rapid development of data services and the continuous promotion of distributed power supply systems, the increase in module power supplies has exceeded that of primary power supplies. The module power supply has an isolation effect, strong anti-interference ability, and has its own protection function for easy integration. With the extensive use of semiconductor technology, packaging technology, and high-frequency soft switching, the power density of module power supplies is increasing, the conversion efficiency is getting higher and higher, and the application is getting easier and simpler.

In the field of switching power supply technology, people are developing related power electronic devices and switching frequency conversion technology at the same time. The mutual promotion of the two promotes the switching power supply to be light, small, thin, low noise, and high reliability with a growth rate of more than two digits every year. , The direction of anti-interference development. Switching power supplies can be divided into two categories: AC/DC and DC/DC. DC/DC converters have been modularized, and the design technology and production process have been mature and standardized at home and abroad, and have been recognized by users, but The modularization of AC/DC, due to its own characteristics, makes it encounter more complicated technical and process manufacturing problems in the process of modularization.

The switching power supply must have protection functions such as overcurrent, overheating, and short circuit in the design. Therefore, the switching power supply module with complete protection functions should be preferred in the design, and the technical parameters of the protection circuit should match the working characteristics of the electrical equipment. Avoid damaging electrical equipment or switching power supply.