Rx and Tx Coils for Portable Electronics and Qi Wireless Charging PadsApril 29, 2020 by Paul Shepard
Vishay Intertechnology, Inc. has introduced new powdered iron based, WPC-compliant (Wireless Power Consortium) wireless charging coils that offer direct replacements for devices for which end-of-life (EOL) was announced in 2017. Offering a durable construction and high permeability shielding, the Vishay Dale receiver and transmitter coils provide high efficiency in a variety of industry-standard sizes.
For wireless charging up to 10W in portable electronics, the six new receiver coils feature inductance of 10.8µH to 22µH at 200kHz with ±5% inductance tolerance, typical Q from 29 to 65 at 200kHz, and DCR from 175mΩ to 427mΩ (±5%) at +25°C.
For Qi wireless charging pads, the three new transmitters offer inductance of 6.3µH to 24µH at 200kHz with a ± % inductance tolerance, DCR from 40mΩ to 75mΩ (±5%) at +25°C, and typical Q from 185 to 200 at 200kHz. The devices are available with heat rated current of 6A and 7A, and saturation current of 20A and 22A.
Samples and production quantities of the wireless charging coils are available now, with lead times of 12 weeks. Pricing for U.S. delivery only ranges from $0.75 to $3.00 per piece.