What are the main power electronic devices used in switching power supply?

Silicon controlled rectifier has a small number of applications in the input rectifier circuit and soft start circuit of switching power supply. GTR is difficult to drive and its switching frequency is low, so it is gradually banned by IGBT and MOSFET. The development direction of switching power supply is high frequency, high reliability, low power consumption, low noise, anti-interference and modularization. Because the key technology of light, small and thin switching power supply is high frequency, foreign open switching power supply manufacturers are committed to developing new high-intelligence components, especially to improve the loss of secondary rectifier devices and increase the technological innovation of power ferrite data to improve the high magnetic performance at high frequency and high magnetic flux density (Bs). The miniaturization of capacitors is also the key technology. With the application of SMT technology, the switching power supply has made great progress, and the components are processed on both sides of the circuit board, which ensures the light, small and thin switching power supply. The high frequency of switching power supply will certainly innovate the traditional PWM switching technology. ZVS and ZCS soft switching technology have become the mainstream technology of switching power supply, which greatly improves the working efficiency of switching power supply. For the high reliability index, American switching power supply manufacturers reduce the stress of devices by reducing the operating current and junction temperature, which greatly improves the reliability of products. Tiejia Electronics Co., Ltd. is a wholly-owned enterprise specializing in the production of high-frequency transformers, inductors and switching power supplies. Since its establishment in 2000, thanks to the friendly support and cooperation of businessmen, it has developed from a small scale to the present, and has set up branches in Jiangxi and Hunan.