By Vishay/Dale 84
Vishay announces the industry’s first commercially available powdered-iron-based, WPC-compliant (Wireless Power Consortium) 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 the chipset of Texas Instruments’ bqTESLA™ wireless power development kit. For the bqTESLA and other 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°C, and Q of 30 min. at 200 kHz. The device features a lead length of 50 mm and tinned length of 10 mm.