Vishay introduced a new powdered-iron-based, WPC-compatible (Wireless Power Consortium) wireless charging A11 type transmitter coil for 5 V applications (AEC-Q200 qualification is pending). Offering a durable construction and high-permeability shielding, the Vishay Dale IWTX-47R0BE-11 6,3 µH is a claimed 18% smaller than other solutions on the market to save space in Qi wireless charging pads, while providing 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 part’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 6,3 μH offers a magnetic saturation of 50% at 4000 gauss.
The RoHS-compliant device features low inductance of 6,3 μH at 200 kHz with a +5% inductance tolerance, DCR of 38 m (±10%) at +25°C, and Q of 190 typical at 200 kHz. The transmitter coil features a lead length of 47 mm and tinned length of 5 mm, and self-resonant frequency of 22 MHz.
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