The reason for the rapid development of switching power supplies

Switching power supply technology is an important branch of power electronics technology, mainly studying AC/DC, DC/DC two kinds of power conversion. For the traditional transistor series regulation power supply transistor is linear continuous control, it has the advantages of good stability, small output voltage ripple, reliable use, etc., but at the same time because of the use of power frequency transformer, there are disadvantages of large volume and heavy. Secondly, the transistor works in a linear amplification state, which needs to ensure the stability of the output voltage by adjusting the on-resistance of the transistor, so there is a large voltage between the collector and the emitter, resulting in an increase in the power loss of the transistor, so the efficiency is low; In addition, too high power loss will cause the power supply heat increase, the need to use a large volume radiator. These shortcomings cause the transistor series adjustment voltage regulator power supply can not meet the requirements of the development of electronic equipment, thus promoting the rapid development of switching power supplies with high efficiency, small size and light weight.