Melexis MLX91230 Hall-Based Current Sensor
The Melexis MLX91230 is the first smart Hall-based current sensor and is part of Melexis’ Gen 3 portfolio. With a measurement of three physical quantities (current, voltage and temperature) and a dedicated 32 KB Flash memory on a single IC, this ASIL compliant product is ideal for safety applications. With its diagnostics the MLX91230 is removing an important part of the burden from the integrator in developing all the safety mechanisms. That includes an on-chip overcurrent detection.
As battery metrics such as State of Charge (SoC), State of Health (SoH) and State of Function (SoF) are directly linked to EV range, high current sensing accuracy is a key factor in these calculations. The MLX91230 comes with +/-0.5% accuracy over temperature (-40℃ to 125℃) for a +/-1% lifetime drift all-in. The MCU enables automatic gain control to cover higher dynamic ranges, and the on-board flash memory supports custom software deployment and extensive compensation of system imperfections. Supplied with a regulated 5V or directly connected to the 12V battery, the MLX91230 in SOCI8 provides measurements and diagnostics either on a LIN bus or via UART.
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Melexis MLX91230 Block Diagram
Development Kit for the Smart MLX91230
The DVK91230 provides a mother board and a sensor board to enable comprehensive performance evaluation of the MLX91230’s capabilities. Note that a Melexis Universal Master MUM (not included) is also required.
The DVK91230 includes:
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