Major foreign switching power supply manufacturers are committed to the simultaneous development of new and highly intelligent components, especially to improve the loss of secondary rectifier devices, and to increase technological innovation in power ferrite (Mn?zn) materials to improve High frequency and large magnetic flux density (Bs) obtain high magnetic performance, and miniaturization of capacitors is also a key technology.
The application of SMT technology has made great progress in switching power supplies. The arrangement of components on both sides of the circuit board to ensure the high frequency of the light switching power supply of the switching power supply will inevitably innovate the traditional PWM switching technology and realize the softness of ZS and ZCS. Switching technology has become the mainstream technology of switching power supply, and has greatly improved the working efficiency of switching power supply. For high reliability indicators, US switching power supply manufacturers reduce the stress of the device by reducing the operating current and lowering the junction temperature, which greatly improves the reliability of the product.
Modularity is the general trend of the development of switching power supply. Modular power supply can be used to form a distributed power supply system, which can be designed as an N←1 redundant coating power supply system, and the capacity expansion of parallel mode can be realized. In view of the large operating noise of the switching power supply, if the pursuit of high frequency alone, the noise will inevitably increase, and the use of partial resonant conversion circuit technology can theoretically achieve high frequency and reduce noise, but part of the resonance There are still technical problems in the actual application of conversion technology, so a lot of work is still needed in this field to make the technology practical