The market trend of power modules!

The market trend of power modules!

In recent years, with the rapid development of power electronic technology, the relationship between power electronic equipment and people's work and life has become increasingly close, and electronic equipment is inseparable from reliable power supply. In the 1980s, computer power supply fully realized the modularization of switching power supply. , took the lead in completing the replacement of computer power supply. In the 1990s, switching power supplies entered various electronic and electrical equipment fields. Program-controlled switches, communications, electronic testing equipment power supplies, and control equipment power supplies have been widely used. Switching power supplies have promoted switching power supplies Rapid development of technology. Now, intelligent applications in emerging fields such as digital TV, LED, IT, security, high-speed rail, and smart factories will also greatly promote the development of the switching power supply market.

The switching power supply module is a new generation of switching power supply products, mainly used in many fields such as civil, industrial and military, including switching equipment, access equipment, mobile communication, microwave communication, optical transmission, routers and other communication fields as well as automotive electronics, aerospace Wait. Due to the characteristics of short design cycle, high reliability and easy system upgrade, the use of modules to form a power supply system has made the application of module power supply more and more extensive. Especially in recent years, due to the rapid development of data services and the continuous promotion of distributed power supply systems, the growth rate of module power supply has exceeded that of primary power supply.

Some people in the industry believe that the high frequency of switching power supply is the direction of its development. The development progresses, with the growth rate of more than two digits every year, towards the direction of lightness, smallness, thinness, low noise, high reliability and anti-interference.

Switching power supply modules can be divided into two categories: AC/DC and DC/DC. The DC/DC converter has now been modularized, and the design technology and production process have been mature and standardized at home and abroad, and have been recognized by users. However, the modularization of AC/DC, due to its own characteristics, encounters more complex technical and process manufacturing problems in the process of modularization. In addition, the development and application of switching power supplies are of great significance in saving energy, saving resources and protecting the environment.

1. The power density is not the highest, only higher

With the extensive use of semiconductor technology, packaging technology and high-frequency soft switching, the power density of module power supply is getting higher and higher, the conversion efficiency is getting higher and higher, and the application is getting easier and simpler. The current new conversion and packaging technology can make the power density of the power supply exceed (50W/cm3), more than double the power density of the traditional power supply, and the efficiency can exceed 90%. Breakthrough performance, with 4x higher power density than comparable converters currently available on the market, enables efficient HVDC power distribution infrastructure in applications such as data center, telecommunications and industrial.

2. Low voltage and high current

With the decrease of the working voltage of the microprocessor, the output voltage of the module power supply has also dropped from the previous 5V to the current 3.3V or even 1.8V. The industry predicts that the output voltage of the power supply will also drop below 1.0V. At the same time, the current required by the integrated circuit increases, requiring the power supply to provide a larger load output capability. For a 1V/100A module power supply, the effective load is equivalent to 0.01, and traditional technology is difficult to meet such difficult design requirements. In the case of a 10m load, each m resistance on the path to the load will reduce the efficiency by 10, and the wire resistance of the printed circuit board, the series resistance of the inductor, the on resistance of the MOSFET and the die wiring of the MOSFET, etc. have influence.

Three, digital control technology is widely used

The switching power supply module uses digital signal control (DSC) technology to control the closed-loop feedback of the power supply, and forms a digital communication interface with the outside world. The modular power supply using digital control technology is a new trend in the future development of the modular power supply industry, and there are few products at present. , Most module power supply companies do not master digitally controlled module power supply technology. Industry insiders believe that in many applications, the requirement to improve energy efficiency will drive the demand for power management ICs in the next year. After several years of slow development, digital power management has now entered a stage of rapid development. Over the next 10 years, focused research on energy-efficient products is expected to drive the adoption of digital power management in applications such as DC-DC converters.

Fourth, the intelligent power module starts to heat up

The intelligent power module not only integrates the power switching device and the driving circuit together. It also has built-in fault detection circuits such as overvoltage, overcurrent and overheating, and can send detection signals to the CPU. It consists of a high-speed and low-power die, an optimized gate drive circuit and a fast protection circuit. Even if a load accident or improper use occurs, the IPM itself can be guaranteed not to be damaged. IPMs generally use IGBTs as power switching elements, and have integrated structures with built-in current sensors and drive circuits. IPM is winning more and more markets with its high reliability and ease of use, especially suitable for frequency converters and various inverter power supplies for driving motors. A very ideal power electronic device.

Switching power supply modules continue to improve integration and intelligence, and the industry is also scrambling to provide higher power density packaging, and intelligent power modules will also achieve great development. Although the switching power supply market has attractive prospects, the high-end market is currently dominated by international brands. Local brands need to continue to strengthen product detail design, quality control, and reliability in order to nugget this big market.