Hall-Effect Current Sensor For EV Traction Inverters

Melexis implements local silicon manufacturing in China to produce integrated circuits for the regional electrification market. The initiative introduces a high-speed current sensor designed for power conversion and electric vehicle powertrains.

Addressing the Industrial Challenge
The Chinese market establishes the pace for global electrification across electric vehicles, power conversion, and renewable energy platforms. Manufacturers require accelerated development cycles and continuous supply for critical electronic components. Relying on extended global supply chains for specialized silicon can introduce logistical constraints. To match the operational speed of high-power electrification systems, operators need locally produced, cost-optimized hardware that maintains strict quality standards for monitoring current flow safely and efficiently.

Technical Solution and Responsibilities
Melexis engineered the MLX91241, a conventional Hall-effect current sensor integrated circuit built for high-power monitoring. The architecture translates established magnetic sensing mechanisms into a localized semiconductor package capable of operating in fast-moving electrical environments. Bruno Boury, Product Line Director at Melexis, stated that starting with current sensing was a natural choice given the regional leadership in EV and energy applications, and that the launch brings regional supply-chain alignment without compromising on quality discipline.

Deployment and Implementation
The operational strategy transitions Melexis from maintaining a physical presence to executing end-to-end local production. By aligning silicon fabrication and logistics with regional supply chains, the integrated circuits connect directly into the local industrial infrastructure. Engineering samples of the current sensor are currently deployed for initial testing and integration by regional engineering teams.

Applications and Use Cases
The sensor architecture is applied within demanding high-power electrification systems. Specific technical use cases include electric vehicle traction inverters, 48 V boost recuperation systems, DC-DC converters, and solar inverters. The technology provides the continuous current flow monitoring required across advanced automotive powertrains and industrial energy management platforms.

Results and Expected Impact
Localizing the manufacturing process of the MLX91241 provides industrial customers with faster development cycles and physical supply continuity. Delivering a cost-optimized, locally manufactured solution stabilizes the supply chain for automotive and energy equipment manufacturers. This hardware deployment establishes the technical and logistical foundation for a broader portfolio of regionally produced semiconductor solutions in the electrification sector.

Edited by Maria Brueva, Induportals editor – adapted by AI.

www.melexis.com