Switching power supply integrated circuit composed of YDS

 　　A switching power supply is a power supply that uses modern power electronics technology to control the turn-on and turn-off time ratio of the switch tube to maintain a stable output voltage. The switching power supply is generally composed of a pulse width modulation (PWM) control IC and a MOSFET. Compared with switching power supplies and linear power supplies , the cost of both increases with the increase in output power, but the growth rates are different. At a certain output power point, the cost of linear power supplies is higher than that of switching power supplies. This point is called the cost reversal point. With the development and innovation of power electronics technology, switching power supply technology is also constantly innovating. This cost reversal point is increasingly moving to the low-output power end, which provides a broad development space for switching power supplies.

　　Switching power supplies are becoming popular and miniaturized. Switching power supply will gradually replace transformers in all applications in life. The application of low-power micro switching power supply 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 increased significantly. Switching power supplies will gradually replace the application of transformers in electric energy meters.