Melexis launches high-performance magnetic position sensor chip MLX90425: driving vehicle electrification innovation with anti-stray magnetic field technology
As the global automotive industry accelerates its transformation to electrification and intelligence, high-precision and high-reliability sensor technology has become a key support. In March 2025, Melexis, a global microelectronics engineering company, officially launched the high-performance magnetic position sensor chip MLX90425, which provides strong technical support for vehicle electrification with its excellent anti-stray magnetic field interference (SFI) performance and compatibility design.
1. Core technological breakthroughs of MLX90425
Anti-stray magnetic field interference capability
MLX90425 has a stray magnetic field immunity (SFI) of up to 5mT, ensuring accurate magnetic induction measurement even in complex electromagnetic environments. This feature is particularly suitable for high-voltage hybrid systems and electric vehicles (EVs), because their motors and high-voltage wiring harnesses may generate strong magnetic field interference, and traditional sensors are susceptible to interference, resulting in data deviations. The MLX90425 solves this problem through optimized magnetic induction technology139.
360° rotation detection and wide temperature adaptation
The chip supports 360° magnet rotation detection and can be widely used in scenarios such as throttle position, gearbox position, exhaust gas recirculation (EGR) system, etc. Its operating temperature range covers -40℃ to 160℃, meeting the stringent automotive environment requirements19.
Packaging compatibility and cost-effectiveness
The MLX90425 uses the dual-mode package (DMP) design of the MLX90364 and MLX90421, and the pin layout is fully compatible, providing a seamless upgrade path for automotive Tier 1 suppliers and OEMs, avoiding the high cost of redesigning components or tools13.
2. Key applications to promote vehicle electrification
In traditional internal combustion engine (ICE) vehicles, Melexis' magnetic position sensors have been successfully used in systems such as throttles and gearboxes. As the automotive industry transitions to high-voltage hybrids, the SFI performance of the MLX90425 becomes the core to ensure the reliable operation of electrified systems. For example:
Wire control system (X-by-Wire): The wire control technology that replaces mechanical connection is highly dependent on redundant sensor design. The precise detection capability of MLX90425 can improve the safety of key systems such as steering and braking26.
High-voltage hybrid system: Its anti-interference characteristics can effectively deal with the electromagnetic noise generated by high-voltage motors, ensuring the stability of battery management systems and powertrains18.
3. Product series expansion and safety standard adaptation
In addition to the single-chip version, Melexis also launched the MLX90425/6 dual-chip stacked version, which integrates dual chips in the same package (such as TSSOP-16 or SMP-4) to achieve redundant design and support ISO 26262 ASIL D system integration. This design is particularly suitable for steering wheel position detection in the field of autonomous driving, meeting the highest level of functional safety requirements2610.
4. Market response and industry value
Klaus Wilczek, global marketing manager of Melexis, pointed out that MLX90425 balances cost and performance with "familiar packaging + innovative technology" to help customers accelerate the development of high-voltage hybrid systems. In addition, its programmable linear transfer characteristics (up to 17 calibration points) and diversified output protocols (analog, PWM or digital SENT) provide flexibility for different application scenarios198.
5. Future Outlook
With the popularization of autonomous driving and ADAS (Advanced Driver Assistance System), the MLX90425 series is expected to further expand to more safety-critical areas, such as vehicle height adjustment, float level detection, etc. Its high integration and anti-interference capabilities will also help the industrial automation field and promote the cross-border application of magnetic sensing technology911.
Conclusion
The launch of Melexis MLX90425 not only marks a new height in magnetic position sensor technology, but also provides a reliable technical foundation for vehicle electrification and intelligence. By balancing performance upgrades and cost control, the chip is expected to become one of the core components in the transformation of the automotive industry, helping global automakers move towards a more efficient and safer future.
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