स्विच मोड बिजली की आपूर्ति (एसएमपीएस), स्विच मोड पावर सप्लाई या स्विच कनवर्टर के रूप में भी जाना जाता है, एक उच्च-आवृत्ति विद्युत ऊर्जा रूपांतरण उपकरण और एक प्रकार का बिजली आपूर्ति है. Its function is to convert a precise voltage into the voltage or current required by the user through different forms of architecture. The input of a switching power supply is mostly an AC power supply (such as mains power) or a DC power supply, while the output is mostly a device that requires a DC power supply, such as a personal computer, and the switching power supply converts the voltage and current between the two.