Transmitter coil saves space in Qi wireless charging pads
Suitable for use in WPC-compatible Tx circuits operating with 19V input for up to 10W wireless charging applications, Vishay Intertechnology has introduced an AEC-Q200-qualified, powdered-iron-based, WPC-compliant wireless charging A10 type transmitter coil.
Offering a durable construction and high permeability shielding, the IWTX-47R0BE-11 is 18% smaller than previous-gen solutions to save space in Qi wireless charging pads, while providing high efficiency greater than 80% when paired with a Vishay Rx coil and appropriate Qi-compatible Rx and Tx circuitry.
Designed for use in conjunction with Vishay's WPC-compliant 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 IWTX-47R0BE-11 offers a magnetic saturation of 50% at 4,000Gs.
The RoHS-compliant device features inductance of 24µH at 200kHz with a +5 or -10% inductance tolerance, DCR of 71mΩ (±10%) at +25°C and typical Q of 200 at 200kHz. The transmitter coil features a lead length of 40mm, tinned length of 5mm and self-resonant frequency of 7MHz.
Samples and production quantities of the IWTX-47R0BE-11 Tx coil are available now, with lead times of 14 weeks for large orders.
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