Server power supply refers to the power used on the server. It is a kind of switching power supply, just like PC power supply. According to the standard, the server power supply can be divided into ATX power supply and SSI power supply. ATX standard is widely used, mainly for office desktops, workstations and low-end servers; SSI standard is produced with the development of server technology, which is suitable for all kinds of servers.
SSI（Server System Infrastructure specification is a new server power specification developed by Intel and some major ia architecture server manufacturers. SSI specification is developed to standardize server power technology, reduce development costs, and extend the service life of servers, mainly including server power specification, backplane system specification, server chassis system specification, and cooling system specification .
Although there are ATX and SSI standards in the popular server power supply, with the more standardization of SSI standard, SSI specification is more suitable for the development of server, and SSI specification will be adopted in the future server power supply. SSI specification is conducive to promoting the development of IA server. In the future, the main frequency of CPU that can be supported will be higher and higher, the power consumption will be larger and larger, the capacity and speed of hard disk will be larger and larger, and more and more high-speed devices can be attached. In order to reduce heating and save energy, SSI server power supply will be low-voltage, high-power, high-density, high-efficiency and distributed in the future. The server uses quite a lot of accessories. It can support 4 or more CPUs, 4-10 hard disks can be mounted, and the memory capacity can be expanded to 10GB. These accessories are large consumers of energy. For example, the medium and high-end industrial standard server uses Xeon (Xeon) processor, and its power consumption has reached more than 80 watts (W), while each SCSI hard disk consumes less energy The power consumption is also more than 10 watts (W), so the power required by the server system is much higher than that of the PC. generally, 200 watts of power supply is enough for the PC, while the server needs 300 watts of power supply. In the actual selection, different applications have different requirements for server power supply. Industries such as telecommunications, securities and finance emphasize data security and system stability, so server power supply should have high reliability. Up to now, the popular high-end servers mostly use redundant power supply technology, which has the functions of current sharing and fault switching, which can effectively avoid the impact of power failure on the system and realize 24 × 7 non-stop operation. N + 1 redundancy is more common in redundant power supply, which can ensure that the system will not be paralyzed in case of one power failure (the probability of more than two power failures is very small). Redundant power supply is usually combined with hot swap technology, that is, hot swap redundant power supply. It can unplug the failed power supply and replace it with a good power supply when the system is running, thus greatly improving the stability and reliability of the server system.
Shenzhen mepson focuses on the research and development of VD MOSFET, SJ MOSFET and SiC. The products can solve the problems of anti surge impact, low energy efficiency, high power density and high junction temperature for client and server power supply.