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 bandwidth of 40 kHz and the sensor has a response time of less than 10 µs.
The MLX91211LUA-ABT is factory-calibrated at three temperature points, enabling greater accuracy for motor control in more demanding use cases. The lower-priced variant, the MLX91211LUA-ABA, targets applications with lower bandwidth and less stringent accuracy requirements.
“These proven hybrid and electric traction architectures are being adopted in affordable electric mobility traction solutions, such as electric two- and three-wheeled motorcycles, electric scooters, and low-speed electric vehicles, as well as 12V/48V starter generator applications in entry-level passenger cars,” explained Bruno Boury, Director of the Current Sensor Product Line at Melexis. “Our MLX91211 sensor integrated circuits now enable designers to create competitively priced modules by combining the high accuracy (thermal drift sensitivity better than 1.5%) required for a great driving experience with features tailored for economy and reliability. To date, ferromagnetic hub technology remains the most reliable and proven non-contact current sensing technology.”.
Both devices are rated 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 now in full production and available in both TO92-3L (UA) through-hole surface mount packages and TSOT23-3L (SE).
