Powdered-iron-based receiver coil designed for 5 V wireless charging
July 13, 2012 // Jean-Pierre Joosting
Vishay Intertechnology has announced a 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 IWAS-3827EC-50 provides high efficiency greater than 70% for receiver applications to 10 W and is 33% smaller than the standard 48 mm by 32 mm IWAS-4832FF-50 receiver 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 mΩ 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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This month, Future Electronics has 20 of Intersil's ISL8203MEVAL2Z evaluation boards to give away to EETimes Europe's readers. Worth 95 US dollars, the board was designed to demonstrate the performance of the ISL8203M dual step-down power module which integrates a PWM controller, synchronous switching MOSFETs, inductors, and passives all in a 9.0x6.5x1.83mm package.
The ISL8203M is rated for...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.