Japanese electronic components supplier Asahi Kasei Microdevices (AKM) and Austrian research center 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.

The technology enables energy efficiency, as well as compact and lightweight design for ultra-high current applications using next-generation SiC power devices, AKM said.

AKM is developing the EZ232L, a linear Hall IC for coreless current sensors. Its high resolution and accuracy enhance the efficiency of traction inverters that require operation over a wide current range.

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

“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.

Source: Asahi Kasei Microdevices