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Vishay Intertechnology Introduces Industry-First Powdered-Iron-Based, WPC-Compliant Rx Coil for Wireless Charging

30th September 2011

Vishay

ES Admin

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Vishay Intertechnology, Inc. today announced the industry's first commercially available powdered-iron-based, WPC (Wireless Power Consortium)-compliant wireless charging receiving coil optimized for use with or without an alignment magnet. Offering a durable construction and high permeability shielding, the new IWAS-4832FF-50 provides high efficiency greater than 70 % for the wireless charging of ≤ 5 W portable electronics.

The Rx coil released today has been designed into a leading wireless power development kit. For wireless power base stations and receivers, the IWAS-4832FF-50's high-saturation powdered iron is not affected by permanent locating magnets, and the device blocks charging flux from sensitive components or batteries.

As an alternative to Ferrite-based solutions, which can saturate in the presence of a strong magnetic field, the IWAS-4832FF-50 offers a magnetic saturation of 50 % at 4000 gauss. The RoHS-compliant device features inductance of 9.7 µH at 200 kHz with a ± 5 % inductance tolerance, DCR of 200 mΩ at + 25 ºC, and Q of 30 min. at 200 kHz. The device features a lead length of 50 mm and tinned length of 10 mm.