WPC-compliant Rx coil for 5 V wireless charging circuitry
16 July 2012
Vishay announced a new powdered-iron-based, WPC-compliant (Wireless Power Consortium) receiving coil for the wireless charging of 5 V 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 10 W and is 33 % smaller than the standard 48 mm by 32 mm IWAS-4832FF-50 Rx coil, with dimensions of 38 mm by 27 mm.
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 10.7 µH at 200 kHz with a ± 5 % inductance tolerance, DCR of 183 mO at + 25 ºC, and Q of 30 typical at 200 kHz. The receiving coil features a lead length of 50 mm and tinned length of 10 mm.
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