Melexis' Latest High-Accuracy Current Sensors Target Affordable e-Mobility

Melexis introduced the MLX91211 Hall-effect current-sensing IC in two variants, providing a choice of features and performance to satisfy cost-sensitive applications. These range from belt-driven starter generators to traction inverters for low-speed electric vehicles and e-scooters, as well as industrial applications such as electrified forklift trucks and pallet trucks.

Combined with a ferromagnetic core, the non-intrusive sensors generate an analog output proportional to the current flowing in the cable or bus bar. The output signal has a 40kHz bandwidth and the sensor features a step response time below 10µs. The MLX91211LUA-ABT is factory-calibrated at three temperature points enabling increased accuracy for motor control in more demanding use cases. The lowest-priced variant, the MLX91211LUA-ABA, addresses applications that have lower bandwidth and lower accuracy requirements. 

Both devices are qualified to AEC-Q100 Grade 0, covering ambient temperatures from -40 °C to 150 °C for use in all automotive environments, including under the hood. The MLX91211 series is in full production now and available in both TO92-3L (UA) through-hole and TSOT23-3L (SE) surface-mount packages.