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Melexis: Solutions for Onboard Charging

Reliability and performance to power tomorrow’s journeys

Melexis features a wealth of product solutions for onboard charging applications to efficiently, reliably and safely convert AC electricity from the electrical grid (e.g. household plug) to DC electricity so that it can be stored in the battery of the electrified vehicle (xEV).

The global shift toward electric vehicles is a response to the growing concern over environmental sustainability and a desire to reduce our reliance on fossil fuels. As electric vehicles become increasingly popular, the demand for efficient, reliable, and safe onboard charging systems is paramount. To meet these demands, engineers and researchers are continually developing new technologies, one of which is the Current Sensor IC.

Current Sensor IC Overview

A Current Sensor IC is a specialized electronic component that accurately measures and monitors electrical current flow within a circuit. These devices are designed to be compact, highly precise, and integrate seamlessly into the onboard charger system of an electric vehicle. In the realm of electric vehicle charging, precision and accuracy are of utmost importance. Current sensors offer unparalleled benefits in this regard.

Precision and Accuracy

In the realm of electric vehicle charging, precision and accuracy are of utmost importance. Current sensors offer unparalleled benefits in this regard.

Current sensors provide precise measurements of the current flowing through the charger circuit. This accuracy is crucial for ensuring that the battery is charged optimally, maximizing its lifespan and performance. Precise current measurements also enable the charger to adapt to different charging conditions, such as varying input voltages or battery states.

Safety and Fault Detection

Accurate current measurement is vital for detecting faults in the charging process. If an anomaly is detected, such as a short circuit or overcurrent, a smart current sensor can trigger safety mechanisms to protect both the charger and the vehicle, preventing potentially dangerous situations. Melexis current sensors are safety oriented with compliance to the ISO 26262 norm. One of the benefits lies in the ability to diagnose over-current with integrated over-current detection.

Efficiency and Optimization

Efficiency is a key concern in electric vehicle design, and current sensor ICs contribute significantly to optimizing the charging process.

Current sensor ICs help minimize energy losses during the charging process. By precisely controlling the current flow, they reduce heat generation within the charger, leading to higher overall efficiency. This means less energy wasted during charging, which is crucial for extending the vehicle's range on a single charge.

Fast Charging Capabilities

The integration of current sensors enables fast charging capabilities for electric vehicles. By accurately managing the charging current, these circuits can safely increase the charging rate without compromising the battery's health. This means shorter charging times and greater convenience for EV owners.

Featured Product Families


Current Monitoring Sensor

The MLX91220 series defines Melexis’ next-generation high-speed isolated integrated current sensor. The Hall-effect based current sensors are qualified for use in a wide range of automotive and industrial applications.

Learn More – MLX91220/21 »


Infrared Temperature Sensor

The MLX90632 infrared temperature sensor group is a miniature SMD thermometer IC for accurate non-contact temperature measurement, especially in thermally dynamic environments where space is limited.

Learn More – MLX90632 »


Hall-Effect Switch IC

The micropower feature makes the MLX90248 especially suitable for battery-powered devices as it combines low voltage operation and low current consumption.

Learn More – MLX90248 »


Hall-Based DC Current Solution

The MLX91230 integrates IVT measurement capability, embeds a microcontroller and supports safety applications, making it ideal for EV battery management and power distribution systems. For DC current sensing, Melexis recently introduced a state-of-the-art IC.

Learn More – MLX91230 »



Isolated integrated current sensor IC MLX91220/21