A switching power supply is an electronic device that converts electrical power efficiently. Unlike traditional linear power supplies, which dissipate excess voltage as heat, switching power supplies use high-frequency switching techniques to regulate output voltage. This allows them to be smaller, lighter, and more energy-efficient, making them ideal for various applications, from computers to televisions. These power supplies operate by rapidly turning the input voltage on and off, creating a series of pulses. A transformer then steps the voltage up or down, and a filter smooths the output. This design minimizes energy loss and heat generation, enhancing overall performance and reliability.