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Vishay Intertechnology Wireless Charging Transmitter Coil Offers High Efficiency for Qi Wireless Charging Pads
MALVERN, Pa. — Oct. 9, 2014 — Vishay Intertechnology, Inc. (NYSE: VSH) today announced a new powdered-iron-based, WPC-compliant (Wireless Power Consortium) wireless charging transmitter coil for Qi wireless charging pads. Offering a durable construction and high permeability shielding, the new Vishay Dale IWTX-4646BE-50 provides high efficiency greater than 70 % at a 19 V input voltage when tested using WPC-compliant transmitter and receiver chipsets and a Vishay Dale IWAS-4832FF-50 receiver coil with 2.7 mm spacing.
Designed for use in conjunction with Vishay's WPC-compliant wireless receiver coils, the IWTX-4646BE-50’s high-saturation powdered iron is not affected by permanent locating magnets. As an alternative to larger ferrite-based solutions − which can saturate in the presence of a strong magnetic field − the IWTX-4646BE-50 offers a magnetic saturation of 50 % at 4000 gauss.
The RoHS-compliant device features inductance of 24 µH at 200 kHz with a ± 5 % inductance tolerance, DCR of 71 mΩ (± 10 %) at +25 °C, and Q of 185 typical at 200 kHz. The transmitter coil features a lead length of 40 mm and tinned length of 5 mm, heat rated current of 6 A, saturation current of 20 A, and self-resonant frequency of 7 MHz. AEC-Q200 certification for use in automotive applications is pending, and expected to be complete in Q1 2015.
Vishay Intertechnology, Inc., a Fortune 1000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers
of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors,
and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial,
computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay’s product
innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can
be found on the Internet at www.vishay.com.
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