Source: Melexis
    On September 19, 2025, Tyson Delo Hamm, Belgium - Global microelectronics engineering company Melexis announced the upgrade of its intelligent IVT (Current, Voltage and Temperature) sensing platform. Add the negative temperature coefficient (NTC) resistance input function to the MLX91230 (Hall effect) and MLX91231 (shunt interface) sensors. This upgrade enables engineers to measure external temperatures more accurately based on the existing junction temperature readings, thereby meeting the comprehensive monitoring requirements in safety-critical applications.

    Integrating NTC input into the MLX91230 and MLX91231 sensors significantly enhances the system's ability to detect temperature changes. For the MLX91231 (shunt interface) sensor, this function also offers an additional application scenario, which can compensate for the residual difference of the shunt resistor caused by temperature changes, further enhancing the accuracy of current detection. In addition, the new NTC input complies with the ASIL C standard and can be applied in critical automotive safety areas, such as automotive batteries, DC fast charging, intelligent thermal fuses, and power distribution modules, etc.
    The new NTC input pins enable engineers to monitor the temperature of external components and perform post-processing with the same chip that performs current detection. This extended function enables the measurement of current, voltage, and temperature based on junction temperature and external NTC through a single device, which helps simplify the development process and enhance system reliability. In addition, the ASIL C functional safety certification in compliance with ISO 26262 standards is applicable to current, voltage and external NTC measurements, as well as diagnosable overcurrent detection (OCD). OCD can also be directly input into the thermal fuse driver, thereby enabling intelligent thermal fuses to be easily deployed with fewer components.
    These new features further enhance the already rich functionality of the MLX91230 and MLX91231 sensors. Each chip is equipped with an MCU with flash memory, which facilitates the deployment of customized software and can effectively compensate for system deviations. In addition, the LIN output option supports simple integration with 12V battery applications and power distribution modules, while the UART interface enables direct communication with the increasingly popular battery management system (BMS) in the battery disconnection unit (BDU). For remote BMS systems, UART-over-CAN can achieve communication by leveraging a more robust physical layer while maintaining the advantage of lower upper-layer resource requirements that current point-to-point communication between sensor modules and BMS has.
    In addition to vehicle applications, the extended functions of the new MLX91230 and MLX91231 are also applicable to a variety of high and low voltage battery solutions, including battery energy storage systems (BESS), solar panel devices, and electric bicycles, providing precise temperature monitoring support for achieving better system management.
    Through these new features, Melexin continues to build a comprehensive portfolio of battery application products, demonstrating our long-term focus on this market. Bruno Boury, director of the product line at Melexin, said, "As miniaturization, fast charging and more demanding application scenarios push systems to the thermal limit, temperature has become a key variable." The newly added NTC input on MLX91230 and MLX91231 can provide additional temperature data points in environments with significant thermal gradients and support shunt resistor DMC (Data Matrix Code) compensation, thereby achieving more accurate current detection.
    MLX91230 and MLX91231 are now widely available. For more information, visit www.melexis.com/MLX91230 or www.melexis.com/MLX91231.

About Melexin Company
    Melexis is committed to designing, developing and providing cutting-edge sensing and driving solutions, putting people first and caring for the Earth. Our mission is to assist engineers in transforming their ideas into practical applications, jointly creating a safe, comfortable and sustainable future, and making beautiful visions a reality within reach.
    We focus on the automotive market and offer a wide range of microelectronic solutions applied in technical fields such as powertrains, thermal management, lighting, electronic braking, electronic steering and batteries. At the same time, we are actively exploring emerging markets such as a sustainable world, alternative mobility, robotics and digital health, leading the trend of innovation.
    Since its establishment in Belgium in 1989, Melexin has grown into a multinational enterprise with over 2,000 employees in 12 countries around the world, providing cutting-edge technical support to customers.
    For more information, please visit: www.melexis.com;

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