What are the main categories of switching power supply?

In the field of switching power supply technology, people are developing power electronic devices and switching frequency conversion technology, which promote the development of switching power supply in the direction of light, small, thin, low noise, high reliability and anti-interference. Switching power supply can be divided into two categories: AC/DC and DC/DC.

Miniature low power switching power supply

Switching power supply is moving towards popularization and miniaturization. Switching power supply will gradually replace all transformer applications in life, low-power micro-switching power supply applications to be reflected in the first, digital display meters, smart meters, mobile phone chargers and so on. At this stage, the state is vigorously promoting the construction of smart grid, the requirements for watt-hour meters have been greatly improved, switching power supply will gradually replace the transformer in the watt-hour meter above the application.

Reverse series switching power supply

The difference between the inverted series switching power supply and the general series switching power supply is that the output voltage of the inverted series switching power supply is negative voltage, which is just opposite to the positive voltage polarity of the general series switching power supply; and because the energy storage inductor L only outputs current to the load when the switch K is off, therefore, in the same strip Under this condition, the output current of the inverted series switching power supply is twice as low as that of the series switching power supply.