How the switch mode power supply circuit works? This is a simple explanation. A switching mode power supply operates by switching some sort of energy storage device between charging mode and discharging modes. Usually, the energy storage device is an inductor or a center tapped transformer, although switching capacitors may accomplish the same sort of goal.

how smps works

The key feature of switching power supply is energy efficiency in the conversion and regulation from AC or DC to a different level of DC, either approximately than the original. The energy is usually store as a magnetic field around an inductor, and the switching is controlled by a voltage comparator with a little hysteresis built in to prevent it from operating as a linear regulator. For further reference, SMPS repair guide ebook by Jestine Yong will help you in repairing various types of SMPS with fast and accurate.