A Switched-Mode Power Supply (SMPS) is an efficient and compact electronic device that converts electrical power from one form to another with minimal energy loss. Unlike traditional linear power supplies, an SMPS uses high-frequency switching and transformers to regulate voltage and current, resulting in lightweight design and excellent energy efficiency. Widely used in LED lighting, computers, industrial equipment, and household electronics, SMPS ensures stable output voltage despite fluctuations in input power. It provides protection against overload, short circuits, and voltage spikes, extending the lifespan of connected devices. Reliable, cost-effective, and versatile, SMPS is essential for modern electronic systems.