Melexis Newly Produced MLX91230 and the MLX91231 Hall Sensors for EV battery current sensing
Tessenderlo, Belgium, 10 November 2022 – MELEXIS reinforces its reputation in the automotive current sensing market by announcing the MLX91230 and the MLX91231. They offer access to shunt or Hall-type current sensor technologies. These ASIL-compliant devices can measure voltage, current, and temperature. Customers will be provided with flexibility and design reusability in their EV power systems.
The MLX91230, a conventional Hall sensor, is complemented by the MLX91231 shunt interface current sensor IC. These devices target high-voltage (HV) battery functions. Such functions include current monitoring in battery management systems (BMS), battery disconnect units (BDUs), also known as battery junction boxes (BJBs), and power relay assemblies (PRAs).
The MLX91230 exhibits below 1% sensitivity drift and 100mA offset over temperature and operational lifespan. The MLX91231 has a sub-0.5% sensitivity drift with a 50mA offset.
By having one product family offering both shunt and Hall-based current sensing, tier1s can decide which combination is the best fit for each vehicle OEM. They can easily switch from one configuration to the other if requirements change. OEMs can integrate different combinations into their vehicle models. This reusability has the benefit of minimizing the engineering effort.
Designed according to the ISO 26262 functional safety standard, both current sensor devices offer full support for ASIL integration. The MLX91230 is naturally isolated, while the MLX91231 needs external isolation. Each sensor has an integrated temperature sensor, as well as a dedicated safety-rated overcurrent detection pin. They are housed in compact 8-pin SOIC packages.
“The new MLX91230/MLX91231 current sensor family is meeting our customers’ demands for a versatile modular BMS development strategy. It allows them to achieve much more with fewer engineering resources,” states Bruno Boury, product line manager at Melexis. “These devices show innovations in both Hall and shunt technologies. It means MELEXIS are undoubtedly the go-to current sensor supplier for EV battery management, whichever technology is required.”
Testing samples (B-sample) and evaluation kits are already available on demand. The MLX91230 Hall-based current sensor will be released in Q2 2023, with the MLX91231 shunt device following soon after.
Bruno Boury presents the IC solutions for EV battery current sensing on November 17th, 2022 at Electronica Munich. Melexis be located at booth B4.540.
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