AKM is developing the EZ232L, a linear Hall IC for coreless current sensors. With its high resolution and accuracy, this technology improves the efficiency of traction inverters that must operate over a wide current range.
Asahi Kasei Microdevices Corporation (AKM) and Silicon Austria Labs GmbH (SAL) have completed a joint proof of concept for integrating a current sensor into a power module for automotive applications such as traction inverters and DC-DC converters.
This technique allows energy efficiency, as well as a compact and lightweight design for ultra-high current applications that employ next-generation SiC power devices.
Demand for reduced, lightweight solutions with high-resolution current sensing is increasing for more efficient inverter systems in xEVs. To address this demand, AKM is developing the EZ232L, a linear Hall IC for coreless current sensors. With its high resolution and accuracy, this technology improves the efficiency of traction inverters that must operate over a wide current range.
Importance of Traction Inverters
Traction inverters are the primary components that power the electric drive motors in xEVs, acting as a link between the battery and the electric powertrain. Specifically, they serve an important function in converting direct current from the battery to alternating current.
To enable smooth and effective control under varied driving conditions—low or high speed, cruising or accelerating—precise current detection over a wide dynamic range is required.
AKM worked with the Austrian research center SAL to undertake a collaborative technical verification, using EZ232L to create a power module that incorporates a current sensor to solve the constraints of traditional magnetic core-based current sensing.
PCIM Europe 2025
AKM will present the results of the joint research with SAL at PCIM Europe 2025, which will be held from May 6 in Nuremberg, Germany. In addition, the two companies are exploring further collaboration, anticipating a positive impact on the market.
Leadership Comments
“With this joint technology validation, we have set a new standard for current sensing in power modules, and we are proud to combine AKM’s expertise with SAL’s research capabilities to achieve this innovative result. We expect that the power module integrating coreless current sensor technology will contribute to smaller and lighter xEVs traction inverters,” said Toshinori Takatsuka, General Manager of AKM’s current sensor business.
“The designed power module offers an all-in-one solution, integrating the latest direct copper bonded power semiconductors along with gate driving circuits and current sensing capabilities. Using a standard PCB and off-the-shelf components, the module provides both flexibility and cost advantages for small-to-medium production volumes,” said Thomas Langbauer, Team Lead within the Power Electronics Division at SAL.
Further Info About Asahi Kasei Microdevices’ Presence at PCIM Europe 2025, CLICK HERE
