Vishay Intertechnology Launches High Humidity Wireless Charging Coils
Vishay Intertechnology, Inc. (NYSE: VSH) has introduced a new line of wireless charging transmitter (Tx) and receiver (Rx) coils designed to excel in high humidity conditions, withstanding environments that reach up to 90% relative humidity (RH). These innovative coils are tailored for various uses, including industrial, medical, and consumer electronics, supporting power levels of up to 30 watts while being 25% smaller than earlier versions and competing alternatives.
Outstanding Moisture Resistance
A key highlight of these coils is their exceptional moisture resistance. This impressive capability comes from a specially crafted shielding coating that provides superior protection against the environment, ensuring reliable functionality in tough conditions. The coils are built with high saturation powdered iron cores that resist temperature fluctuations, avoiding problems like sudden drops in inductance often seen in ferrite-based solutions. The choice of materials for the shield significantly enhances inductance while effectively managing flux leakage, optimizing the magnetic flux performance.
Technical Details of the Coils
The Vishay IWAS3222CZEB190JR1 receiver coil features an inductance of 19.6 µH, 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, showcase a wide inductance range, from 6.3 µH to 24 µH. With a low DCR of 40 m? and Q values reaching up to 200, these Tx coils are crafted for maximum power transfer efficiency. They maintain consistent performance due to their high saturation currents, which can go up to 22 A.
Robust Design for Daily Use
Durability plays a critical role in the design of these Tx coils, which employ silk-covered litz wire. This approach not only guards against scratches and deformation but also enhances insulation and reduces electrical losses that can occur due to the skin effect. Notably, some models incorporate the alpha winding technique, which helps to minimize wire crossover and achieve remarkably low profiles without sacrificing performance.
Diverse Market Applications
These wireless charging coils are well-suited for a range of applications. They cater to handheld battery-powered tools, diagnostic equipment, smartphones, tablets, gaming controllers, and wearable technology. Additionally, they comply with RoHS regulations and halogen-free standards, reinforcing Vishay's commitment to environmental sustainability (Vishay Green) while ensuring high performance.
Availability and Future Outlook
Production samples for the IWAS3222CZEB190JR1, IWTX4646DCEB240JR1, IWTX47R0DAEB6R3JR1, and IWTX47R0EBEB240JR1 coils are now available with an estimated lead time of around 14 weeks. Vishay continues to uphold its reputation as a leader in the passive and discrete semiconductor markets, delivering innovative solutions that serve a wide range of industries such as automotive, telecommunications, and medical technologies. The breadth of Vishay’s product offerings underscores its dedication to advancing technology and highlights its pivotal role in the electronics manufacturing sector.
Frequently Asked Questions
What are the key features of the new Vishay charging coils?
The new coils provide moisture resistance up to 90% RH, utilize high saturation powdered iron cores, and are designed to be more compact than previous models.
What is the maximum power rating these coils can handle?
These coils support power levels reaching up to 30 watts, demonstrating their versatility for various applications.
How do these coils handle high humidity conditions?
Thanks to specialized materials and coatings, these coils maintain their performance in high humidity environments.
Which applications are these coils suitable for?
These coils are ideal for handheld tools, smartphones, gaming devices, medical instruments, and more, proving their versatility across various sectors.
Where can I find additional information on Vishay products?
You can visit Vishay's official website for more information, including product specifications and further resources.
