In the field of switching power supplies technology, people develop related power electronic devices while developing switching frequency conversion technology. The direction of anti-interference development. Switching power supplies can be divided into two categories: AC/DC and DC/DC.

1. Miniature low power switching power supplies
Switching power supplies are becoming popular and miniaturized. Switching power supplies will gradually replace all applications of transformers in life. The application of low-power miniature switching power supplies should first be reflected in digital display meters, smart meters, mobile phone chargers, etc. At this stage, the country is vigorously promoting the construction of smart grids, and the requirements for electric energy meters have been greatly increased. The switching power supplies will gradually replace the application of transformers in electric energy meters.
2. Reverse series switching power supplies
The difference between the inversion series switching power supplies and the general series switching power supplies is that the output voltage of this inversion series switching power supplies is a negative voltage, which is just opposite to the positive voltage output of the general series switching power supplies; and due to the energy storage The inductor L only outputs current to the load when the switch K is turned off. Therefore, under the same conditions, the output current of the inversion series switching power supply is twice as small as that of the series switching power supplies.