New WPC-compatible A11 type wireless charging transmitter coil

Vishay has introduced a new powdered-iron-based, WPC-compatible (Wireless Power Consortium) A11 type wireless charging transmitter coil for 5V applications. AEC-Q200 qualification is pending. Offering a durable construction and high permeability shielding, the IWTX-47R0BE-11 6.3µH coil 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'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 coiI 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 38mohm (±10%) at +25C, 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.