Space-saving wireless charging for 5V applications
A powdered-iron-based, WPC-compatible wireless charging A11 type transmitter coil for 5V applications has been introduced by Vishay.
AEC-Q200 qualification is pending. Offering a durable construction and high permeability shielding, the new Vishay Dale IWTX-47R0BE-11 6.3μH is 18% smaller than other solutions on the market to save space in Qi wireless charging pads, while providing high efficiency greater than 70% when paired with a Vishay Rx coil and appropriate Qi-compatible Rx and Tx circuitry.
Designed for use in conjunction with Vishay's WPC-compatible wireless receiver coils, the IWTX-47R0BE-11 6.3μH'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-47R0BE-11 6.3μH offers a magnetic saturation of 50% at 4,000 gauss.
The RoHS-compliant device features low inductance of 6.3µH at 200kHz with a + 5% inductance tolerance, DCR of 38mΩ (± 10%) at + 25°C, and Q of 190 typical at 200kHz. The transmitter coil features a lead length of 47mm and tinned length of 5mm, and self-resonant frequency of 22MHz.
Samples and production quantities of the IWTX-47R0BE-11 6.3μH Tx coil are available now, with lead times of 14 weeks for large orders.
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