LSD group is one of largest comprehensive Power Magnetic components manufacturer in China. It was originally founded in Ningbo, 1984.We have been witnessed transformer technology evolution from century to century. Our advantages also have been improved along with the time. At first 20 years, LSD has been working with major electrical products like CRT TV,Air conditioner, Refrigerator, Mircowave and Washing machine. At early 2007, LSD estabilished Power R&D center focus on Switch Power and LED Power Supply.Atfer aquired ERA in 2011, LSD started providing high recognition Encapsulated Transformer worldwide.Same year, LED Power Supply was offically released to major market. At present, LSD group become a giant power megnatic electronic ompoents solution provider by designing and manufacturing transformer, inductor, filter, coil, switch power, power module and LED power supply.,etc.