Vishay Intertechnology Launches Moisture-Resistant Wireless Coils

Vishay Intertechnology Introduces High Humidity Wireless Charging Coils

Vishay Intertechnology, Inc. (NYSE: VSH) has unveiled an innovative range of wireless charging transmitter (Tx) and receiver (Rx) coils specifically designed to perform remarkably well in high humidity environments, enduring conditions up to 90% relative humidity (RH). These new coils, optimized for various applications including industrial, medical, and consumer electronics, support power levels up to 30 watts while occupying 25% smaller footprints than previous generations and competing products.

Advanced Moisture Resistance Features

The standout feature of these newly introduced devices is their exceptional moisture resistance. This performance attribute is achieved through a specially developed shield coating that offers superior environmental protection, ensuring reliable operation even in challenging conditions. The coils utilize high saturation powdered iron cores that are resistant to temperature variations, eliminating issues such as abrupt drops in inductance commonly found in ferrite-based solutions. The choice of shield materials is crucial; it enhances inductance while managing flux leakage effectively, thus maximizing the flanking of the magnetic flux.

Technical Specifications of the Coils

The Vishay IWAS3222CZEB190JR1 receiver coil boasts an inductance of 19.6 ?H, a quality factor (Q) of 28.5 at 200 kHz, and a direct current resistance (DCR) of 357 m?. Its counterparts, the IWTX4646DCEB240JR1, IWTX47R0DAEB6R3JR1, and IWTX47R0EBEB240JR1, offer a broad range of inductance from 6.3 ?H to 24 ?H. With a DCR as low as 40 m? and a Q of up to 200, these Tx coils are designed to maximize power transfer efficiency. They maintain stable performance due to their high saturation currents, reaching up to 22 A.

Durable Design for Everyday Use

Durability is paramount in the design of these Tx coils, which feature silk-covered litz wire. This design not only protects against physical damage like scratching and deformation but also improves insulation and minimizes electrical losses caused by the skin effect. Notably, manufacturing processes like the alpha winding technique have been applied in certain models, resulting in minimal wire crossover and the achievement of extremely low profiles without compromising performance.

Potential Applications in Diverse Markets

These wireless charging coils are ideal for a variety of applications. They are suitable for handheld battery-operated tools, diagnostic equipment, smartphones, tablets, gaming controllers, and wearable technology. Compliance with RoHS regulations, halogen-free standards, and Vishay's commitment to environmental sustainability (Vishay Green) means these products are designed to meet modern environmental standards without sacrificing performance.

Availability and Future Prospects

Production samples for the IWAS3222CZEB190JR1, IWTX4646DCEB240JR1, IWTX47R0DAEB6R3JR1, and IWTX47R0EBEB240JR1 coils are currently available with a lead time of approximately 14 weeks. Vishay continues to maintain its reputation as a leader in the passive and discrete semiconductor markets, generating innovative solutions that cater to a wide array of industries including automotive, telecommunications, and medical devices. Vishay’s extensive portfolio underlines its commitment to advancing technology, emphasizing its role as a crucial player in electronics manufacturing.

Frequently Asked Questions

What are the key features of the new Vishay charging coils?

The new coils offer moisture resistance up to 90% RH, high saturation powdered iron cores, and a smaller footprint compared to previous models.

What is the maximum power rating these coils support?

These coils can support power levels up to 30 watts, making them versatile for various applications.

How do these coils perform in high humidity conditions?

Designed with specialized coatings and materials, these coils maintain performance integrity in high humidity environments.

In which applications can these coils be used?

Applications include handheld tools, smartphones, gaming devices, medical instruments, and more, showcasing their versatility.

Where can I find more information about Vishay products?

For more details, visit Vishay's official website, where product specifications and other resources are available.

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