Switching power supply is a kind of power supply that uses modern power electronic technology to control the time ratio of switching on and off to maintain a stable output voltage. Switching power supplies are generally composed of pulse width modulation (PWM) control ICs and MOSFETs. With the development and innovation of power electronics technology, switching power supply technology is constantly innovating. At present, the switching power supply is widely used in almost all electronic equipment due to its small size, light weight and high efficiency. It is an indispensable power supply method for the rapid development of today's electronic information industry.

　The switching power supply is generally composed of pulse width modulation (PWM) control IC and MOSFET. Compared with the linear power supply, the cost of the switching power supply increases with the increase of the output power, but the growth rate of the two is different. The cost of the linear power supply is higher than the switching power supply at a certain output power point. This point is called the cost reversal point. With the development and innovation of power electronics technology, switching power supply technology is constantly innovating. This cost reversal point is increasingly moving to the low output power end, which provides a broad development space for switching power supplies. Its working principle is as shown in the figure below. Shown: (provided by Shenzhen Xikat Electric Co., Ltd., widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instrumentation, medical equipment, semiconductor cooling and heating, Air purifiers, electronic refrigerators, liquid crystal displays, LED lamps, communication equipment, audio-visual products, security monitoring, LED light bags, computer cases, digital products and instruments, etc.

According to the "China's Switching Power Supply Market Research and Development Prospect Forecast Report (2015-2020)" released by China Industry Research Network, high frequency switching power supply is the direction of its development. High frequency makes switching power supply miniaturization and makes Switching power supplies have entered a wider range of applications, especially in the high-tech fields, which has promoted the development of switching power supplies. Each year, with a growth rate of more than two digits, it is becoming light, small, thin, low noise, high reliability, and anti-interference. The direction of 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.

The development prospect of switching power supply in the 21st century: 1.1. Semiconductors and circuit devices are important supports for the development of switching power supplies. 2. The development direction of power electronic products or circuits is modularization and integration. Special chips with various control functions, external wiring , The solder joints are reduced, and the reliability is significantly improved. Integration and modularization make the power supply products small in size and high reliability, which brings great convenience to the application. It can be expected that the following issues are the eternal direction of the development of switching power supplies:

(1) The frequency of the switching power supply must be high, so that the dynamic response can be fast, and it is necessary to work with high-speed microprocessors; it is also an important way to reduce the volume.

(2) To reduce the volume, the inductance and capacitance of the transformer must be reduced in volume.

(3) The efficiency should be high, the heat generated will be reduced, the heat dissipation will be easy, and it is easy to achieve high power density.

Power electronics technology is an important supporting technology. According to the President's Council of Science and Technology Advisory Committee, there are seven key national science and technology fields: energy, environmental protection, information and communications, life sciences, materials, and transportation. There is no one in each field. It is not related to power electronics, but it is playing an important role, and switching power supply is an important aspect of it, with far-reaching bright prospects. It is very important to choose a good and high-quality manufacturer. After-sales issues are also our consumers' most worrying Quality assurance is particularly important in this regard. Shenzhen Totiwo Technology Co., Ltd. is undoubtedly a very good one, with sufficient power, low temperature rise, perfect after-sales, short delivery time, Shenzhen local old-brand enterprise, and a wide range of product types. Stable quality, honest operation, not false standard power supply, flexible minimum order quantity, flexible delivery time and after-sales guarantee, quality problem manufacturers are responsible, five-year warranty, three-year renewal, free replacement for broken ones, from purchase to after-sales one Dragon service.