Integrated Hall Effect microswitch for automotive
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Melexis in Belgium has developed a highly integrated low power Hall-effect switch with high tolerances for reliable and predictable output update rate.
The MLX92235 micropower Hall effect switch can be used for door handles, e-latches, sun visors, infotainment buttons, brake light switches, and more.
For modern vehicles, accurate switch and latch mechanisms are relied upon by countless systems for feedback. With numerous switches deployed across cars, it is also important to ensure that they operate efficiently, minimizing power draw.
The highly sensitive chopper stabilized Hall Sensor, the MLX92235 provides accurate and contactless feedback in a range of magnetic functions, including unipolar/omnipolar switch or latch deployments.
To minimize board space the MLX92235 does not require any external components and is offered in a standard automotive TSOT23-3L package and operates from -40oC to 105oC. A flexible input voltage, choice of magnetic threshold, temperature coefficient, update rate, and output options (push-pull or open drain) facilitates seamless integration into various vehicle systems.
The power logic in the MLX92235 enables automatic sleep/awake sequencing delivering a typical sleep current consumption of 0.65μA at 1.8V. Furthermore, the MLX92235 includes selectable sleep time from 0.6ms to 800ms.
“With the new MLX92235 we have delivered contactless Hall effect reliability and accuracy in a low power design to replace all mechanical switches in a car,” stated Minko Daskalov, Product Line Manager at Melexis. “It will help automotive engineers to bring intelligence to a wide range of automotive switch and latch functions, ultimately benefiting the end-user.”
Samples for the MLX92235 are available now.
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