Asahi Kasei Microdevices Corporation (AKM) and Silicon Austria Labs GmbH (SAL) have successfully completed a joint proof of concept for integrating a current sensor into a power module to be used in automotive applications such as traction inverters and DC-DC converters. This technology enables energy efficiency, as well as compact and lightweight design for ultra-high current applications using next-generation SiC power devices.

Market demand for downsized, lightweight solutions with high-resolution current sensing is on the rise for more efficient inverter systems in xEVs. To meet this need, AKM is developing the EZ232L, a linear Hall IC for coreless current sensors.

Current sensor integrated power module developed by AKM and SAL

With its high resolution and accuracy, this technology enhances the efficiency of traction inverters that require operation over a wide current range. Traction inverters are the core component that powers the motors of electric drive systems in xEVs, serving as the bridge between the battery and electric drivetrain. Specifically, they play a critical role in converting direct current from the battery into alternating current.

To ensure smooth and efficient control across varying driving conditions—low or high speed, cruising or accelerating—precise current sensing over a wide dynamic range is essential.

AKM collaborated with the Austrian research center SAL to conduct a joint technical verification, using EZ232L to develop a power module that integrates a current sensor in order to address the limitations of conventional magnetic core-based current sensing.

AKM will present the results of the joint research with SAL at PCIM Europe 2025, which will be held from 6 May in Nuremberg, Germany. In addition, the two companies are exploring further collaboration, anticipating a positive impact on the market.