In the field of switching power supply technology, people are developing related power electronic devices and switching frequency conversion technology. The two promote each other to promote the switching power supply to light, small, thin, low noise, high reliability, with a growth rate of more than two digits every year. The direction of anti-interference development. Switching power supplies can be divided into two categories: AC/DC and DC/DC.
Miniature low power switching power supply
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 micro-switching power supplies must first be reflected in digital display meters, smart meters, mobile phone chargers, and so on. At this stage, the country is vigorously promoting the construction of smart grids, and the requirements for electric energy meters have been greatly increased. Switching power supplies will gradually replace the application of transformers in electric energy meters.
Reversing series switching power supply
The difference between the reversing series switching power supply and the general series switching power supply is that the output voltage of this reversing series switching power supply is negative voltage, which is just opposite to the positive voltage output of the general series switching power supply; and because of energy storage The inductor L only outputs current to the load when the switch K is turned off. Therefore, under the same conditions, the current output by the reversing series switching power supply is twice as small as the output current of the series switching power supply.