TDK has reported that it has developed a wireless power transfer coil unit specifically designed for use in smartphones and other mobile devices. The receiving coil can be integrated into smartphones. It has a width of just 0.57 mm.
TDK wireless power transfer coil unit
The development shows the company’s know how in fields like process technology and magnetic materials technology, and includes the fabrication of extremely thin, flexible and unique metal magnetic sheet. Consequently, the coil unit is lightweight and ultra thin, and provides high resistance to shock. It offers exceptional reliability.
The design of the coil reduces the tendency towards increasing resistance and attains power transfer efficiency so that the specifications set by the WPC “Qi” standard are cleared. This coil unit can be used in smartphones because of its low height.
Currently, the coil produces an output current on the order of 0.5 to 0.6 A. The company is already developing even thinner 0.50 mm type coil in order to commence mass production during 2013.
Integration of more and more functions in smartphones results in increasing power consumption and frequent charging of the battery. The WPC and other promotional associations work together in order to standardize wireless power transfer with an objective to create an infrastructure environment that enables charging everywhere, at any time.
The company is creating and delivering products to demonstrate its extensive knowledge in several relevant fields. This includes process and magnetic materials technology, winding pattern technology know-how that was gained through the production of various types of coils, and magnetic circuit design technology. TDK aims to provide technology solutions that reduce the influence on reception sensitivity and include EMC countermeasure.