Melexis to demonstrate integrated magnetic concentrator technology at Electronica

Melexis IMC technology for sensors

At next month’s Electronica in Munich, Melexis will be showing how its integrated magnetic concentrator (IMC) technology can deliver tangible benefits to designers using its Latch & Switch product range, especially in demanding automotive applications.

As many traditional Hall-effect sensors are only sensitive to magnetic flux perpendicular to the IC, it can be necessary to develop complex – and therefore large and expensive – custom magnetic structures to achieve the desired measurement. The Latch & Switch sensors use the magnetic Triaxis technology that allows the measurement of the lateral magnetic flux component.

As a result of the inclusion of IMC technology, simple wheel speed sensing on motorcycles can be performed using a single two-wire switch sensor with integrated capacitor (MLX92242 or MLX92241) and a traditional magnet. This approach uses the lateral field rather than the previous method of using the perpendicular field, thus simplifying the designer’s task.

As brushless DC (BLDC) motors become an increasingly popular choice for many applications including blowers, cooling fans and pumps, more sophisticated control is required. By integrating an IMC into products, such as the MLX92211, surface mount sensing is available, thereby simplifying the production process and reducing the space required.

In the automotive world, DC motors are proliferating into applications such as windows and seat positioning. The ability to sense direction had required a complex four-pole magnet but, by including IMC technology into the MLX92211, the MLX92221 and the recently released MLX92256 four-wire sensors, more accuracy can be achieved with any magnet. The simplicity extends to setting up, as only crude alignment is required to facilitate a pitch-independent sensor.

With devices such as the MLX92231, MLX92291, MLX92211, MLX92232 and MLX92292, which are commonly used in automotive applications such as transmission selectors (gear shifts) and HMI interfaces, the inclusion of an IMC allows the magnet to be placed beside the sensor, thereby saving space and enabling applications where previously there was not enough room for a magnetic sensing product.

“IMC technology is fundamental to Melexis’ magnetic sensing and allows our products to sense in ways that are simply not possible with alternatives,” said Dieter Verstreken, product line manager at Melexis. “By extending the availability of IMC further through our product range, we are making designers’ lives easier as well as delivering a whole new world of sensing possibilities.”

The IMC option will be available in a variety of products from this month and will be showcased at Electronica in hall B4, stand 542.


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