12 Jul 2012

Vishay Intertechnology launches a powdered-iron-based, Rx Coil for 5V wireless charging

Vishay Intertechnology has unveiled a powdered-iron-based, WPC-compliant (Wireless Power Consortium) receiving coil for the wireless charging of 5V portable electronics.

Offering a durable construction and high permeability shielding, the new IWAS-3827EC-50 provides high efficiency greater than 70% for Rx applications to 10W and is 33% smaller than the standard 48mm by 32mm IWAS-4832FF-50 Rx coil, with dimensions of 38mm by 27mm.

For wireless power base stations and receivers, the IWAS-3827EC-50's high-saturation powdered iron is not affected by permanent locating magnets, and the device shields sensitive components or batteries from charging flux.

As an alternative to Ferrite-based solutions, which can saturate in the presence of a strong magnetic field, the IWAS-3827EC-50 offers a magnetic saturation of 50 % at 4000 gauss.

The RoHS-compliant device features inductance of 10.7µH at 200kHz with a ±5 % inductance tolerance, DCR of 183mΩ at + 25ºC, and Q of 30 typical at 200kHz. The receiving coil features a lead length of 50mm and tinned length of 10mm.

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