Wireless Charging Receiving Coil Delivers High Efficiency for 10 W Applications

Vishay Intertechnology, Inc. announced a new powdered-iron-based, WPC-compliant (Wireless Power Consortium) wireless charging receiving coil designed for 10 W applications. Offering a durable construction and high permeability shielding, the new Vishay Dale IWAS-4832FE-50 provides high efficiency greater than 70 % for wireless charging up to 10 W for portable electronics, including tablets, notebook computers, and handheld medical equipment.

The IWAS-4832FE-50's high-saturation powdered iron is not affected by permanent locating magnets, and the device blocks charging flux from sensitive components and batteries. As an alternative to ferrite-based solutions, which can saturate in the presence of a strong magnetic field, the IWAS-4832FE-50 offers a magnetic saturation of < 50 % at 4000 gauss.

The RoHS-compliant device features inductance of 15 µH at 200 kHz with a ± 5 % inductance tolerance, DCR of 255 mW at + 25 °C, and Q of 60 minimum at 200 kHz. The IWAS-4832FE-50's rated current of 2 A enables 10 W of charge at 5 V. The receiving coil features a lead length of 50 mm and tinned length of 10 mm.

Samples and production quantities of the IWAS-4832FE-50 Rx coil are available now, with lead times of five to eight weeks. Pricing for U.S. delivery only is $1.50 per piece in 10,000-piece quantities.