Power

Wireless charging coils replace end-of-life devices

30th April 2020
Mick Elliott

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 have been released by Vishay Intertechnology.

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 ± 5% 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 7 A, and saturation current of 20A and 22A.

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