10A Wall Smart Switch

Classification of switching power supply:

In the field of switching power supply technology, people develop related power electronic devices and switching frequency conversion technology at the same time. They promote each Other to promote the development of switching power supply to the direction of light, small, thin, low noise, high reliability and anti-interference with the growth rate of more than two digits every year. Switching power supply can be divided into two categories: AC / DC and DC / DC. The DC / DC converter has 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, has encountered more complex technology and process manufacturing problems in the process of modularization. The following describes the structure and characteristics of the two types of switching power supply.

Earthing

The switching power supply will produce more interference than the linear power supply. For the electrical equipment sensitive to common mode interference, grounding and shielding measures shall be taken. According to the EMC limits of ice1000, en61000, FCC, etc., the switching power supply shall adopt EMC measures, so the switching power supply shall generally be equipped with EMC filter. For example, the HA series switching power supply of Lide Huafu technology can meet the above electromagnetic compatibility requirements only when its FG terminal is grounded or connected to the user's enclosure.

Protection circuit

The switch power supply must have over-current, overheat, short circuit and other protection functions in the design, so the switch power supply module with complete protection functions shall be preferred in the design, and the technical parameters of its protection circuit shall match the working characteristics of the electrical equipment to avoid damage to the electrical equipment or switch power supply.