A new brake pedal position sensor, the MLX90424 is developed by Melexis as a cost-effective solution for automotive brake systems.
The MLX90424 sensor innovated by Melaxis in Tessenderlo, Belgium, integrates two position-sensing integrated circuits (ICs) along with a wake-up switch in a compact single package. Capable of being powered directly by a 12V battery, it provides accurate linear displacement measurements up to 30mm, simplifying automotive braking system designs and enhancing their functional safety. Its embedded magnetic switch facilitates a power-saving mode, making it particularly beneficial for space-constrained environments. In comparison to conventional brake pedal modules that require separate position sensors and switches, the MLX90424 consolidates both functions into one module, effectively simplifying the design and reducing the number of required components in the assembly.
Using the proprietary Triaxis hall technology, the sensor ensures robust performance against magnetic stray fields, a common challenge in automotive environments. With certification standards that include automotive electronics council (AEC)-Q100 qualification, the position-sensing component supports automotive safety integrity level (ASIL)- D integration, while the switch function achieves ASIL- B, adhering to the ISO 26262 standard for automotive functional safety. Additionally, the device demonstrates stray field resistance up to 5mT (4kA/m), compliant with ISO 11452-8, further enhancing its reliability in braking operations.
The sensor is designed to offer flexibility in power supply options, allowing direct connection to the 12V battery without requiring an additional regulator. This feature optimizes power efficiency and aids in system simplification.
“As an application-specific solution, the MLX90424 is a perfect demonstration of how Melexis contributes to brake pedal sensor technology and why it is the trusted market leader,” said Klaus Wilczek, global marketing manager for position sensors, Melexis. “With this new solution, our team has developed a product that enables engineers to create simpler and more integrated designs,” he added.
In essence, the latest sensor represents a significant advancement in brake pedal sensing by enhancing both safety and efficiency for modern automotive systems. Its integrated design is expected to optimise vehicle brake assemblies, reduce component costs, and support a more energy-efficient braking function.
