AKM and SAL integrate current sensor into power module
Asahi Kasei Microdevices (AKM) and Silicon Austria Labs (SAL) have 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.
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 in traction inverters. To meet this need, AKM is developing the EZ232L, a high resolution linear Hall IC for coreless current sensors.
AKM collaborated with the Austrian research centre 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.
“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.
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.
