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 for electric vehicle (EV) applications, including traction inverters and dc-dc converters.
The development enables higher energy efficiency and supports compact, lightweight designs for ultra-high current applications using next-generation silicon-carbide (SiC) power devices.
As demand grows for smaller and more efficient inverter systems in EVs, there is a rising need for precise, high-resolution current sensing across wide dynamic ranges.
AKM is addressing this by developing the EZ232L, a linear Hall IC designed for coreless current sensors. Its performance enhances traction inverter efficiency, critical for managing energy transfer between the battery and electric drivetrain under varying speed and load conditions.
To validate this technology, AKM collaborated with SAL to build a power module that integrates the EZ232L sensor. This module eliminates the need for bulky magnetic cores, offering a streamlined architecture that simplifies system design and reduces overall module size.
The prototype integrates direct copper bonded power semiconductors, gate drivers, and the current sensor on a standard PCB using off-the-shelf components. This provides greater design flexibility and cost-effectiveness for small-to-medium production volumes.
The partners plan to present the results of this collaboration at PCIM Europe 2025, held May 6th to 8th in Nuremberg, Germany. The two organizations are also exploring further opportunities for joint development to advance the integration of coreless sensing into high-power EV platforms.
Filed Under: Technology News