Switching power supplies are categorized into AC-DC power supplies, DC-DC converters, and DC-AC inverters. They convert the input of commercial or DC power supplies into specified voltages or currents, and are employed in almost all electronic devices or systems that require a stable DC power supply. TDK continues to offer highly reliable and innovative power supplies for industrial equipment and energy markets, including computer equipment, communication equipment, medical equipment, control and measurement equipment, semiconductor manufacturing equipment, automatic equipment, railway equipment, and LED equipment, under the TDK-Lambda brand. TDK-Lambda is the only specialized power supply manufacturer that can procure important components such as ferrite, capacitors, or inductors used in power supply transformers within the TDK group. The company focuses on the development of innovative power supplies, taking advantage of its strength of being capable of developing power supplies from the levels of materials and components, as well as its long-accumulated core technologies, including circuit design technologies and thermal/magnetic field evaluation and simulation technologies.