The switch senses conductive targets directly, offering a contactless, magnet-free solution that enhances safety and simplifies vehicle designs in automotive technology.
Melexis has introduced the Induxis MLX92442 switch, a contactless and magnet-free solution that directly senses conductive targets, eliminating the need for traditional mechanical or magnetic switches. This technology is designed for automotive applications such as high-voltage interlocks, charging flaps, seatbelts, and brake-by-wire systems. Traditionally, automotive latches and switches, like door handles or brake light switches, required modifications such as adding magnets or physical buttons. The MLX92442, however, detects the safety target directly if it is conductive.
The induction-based switch offers several advantages over conventional switches. It enhances reliability and safety by eliminating moving parts and potential magnetic interference. It simplifies the bill of materials and reduces wear over time, which is common in mechanical solutions. The design of the switch integrates coils and interfaces within the chip, significantly miniaturizing and simplifying the packaging. Available in both through-hole VK and surface-mount SOIC packages, it reduces necessary components from three to two, omitting additional magnets and promoting a safer and more sustainable design.
Additionally, the switch features built-in protections against reverse supply voltage, under-voltage, and thermal overloads, along with an advanced self-diagnostic function that supports a dedicated safe mode. Its integration facilitates faster development cycles by eliminating the need for magnetic simulation, allowing for a simple definition of the applications’ shape and motion during programming.
The standard packaging facilitates easier system integration and streamlines the supply chain by simplifying prototyping and production assembly times. It maintains mechanical tolerances within air gaps up to 1.5 mm and supports a wide operating voltage range and high-temperature resistance. The MLX92442 meets ISO26262 ASIL A standards and offers a reliable, minimal-design alternative for safety-critical applications capable of operating alongside other sensor technologies.
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