Vishay Intertechnology has developed new powdered iron based wireless charging transmitter (Tx) and receiver (Rx) coils that are optimized for high humidity conditions up to 90% RH. Designed for industrial, medical, and consumer electronics applications by delivering an output power of up to 30 W, the Vishay Dale IWAS3222CZEB190JR1, IWTX4646DCEB240JR1, IWTX47R0DAEB6R3JR1, and IWTX47R0EBEB240JR1 coils offer high temperature operation up to +105°C in 25% smaller footprints compared to previous-generation devices and competing solutions.
These coils have inductance values ranging from 6.3 to 24 µH with a Q-factor up to 200 and a current rating of 7 A. With high saturation current handling capability of 22 A, The transmitter coils ensure stable inductance and consistent performance across the operating current range.
Key Features Offered by the Coils
- The coils’ high moisture resistance results from their specialized shield coating, which provides superior environmental protection.
- The devices’ high saturation powdered iron makes them immune to the temperature fluctuations and sharp inductance drop-off behavior observed in ferrite-based solutions
- Shield material selection is critical, as it is used to boost the inductance of the coil, contain any flux leakage, and maximize flux directivity. Several shield shapes are offered as of now, which are rectangular, square, and round.
Additionally, these coils use silk-covered litz wire to protect against scratching and wire deformation and provide improved insulation with reduced electrical skin effects and proximity losses in the transmit coils.
These coils are available in multiple packaging options and are suitable for applications such as handheld, battery-powered tools and diagnostic and therapeutic instruments; drones, smartphones and tablets, gaming controllers, and wearable devices.
Availability of Samples
Samples and production quantities of the IWAS3222CZEB190JR1, IWTX4646DCEB240JR1, IWTX47R0DAEB6R3JR1, and IWTX47R0EBEB240JR1 are available now, with lead times of 14 weeks.
Click here to learn more about these new wireless charging Tx and Rx coils.
