Asahi Kasei Microdevices’ new current sensor enables smaller on-board chargers for electric vehicles

Asahi Kasei Microdevices’ new current sensor enables smaller on-board chargers for electric vehicles

Asahi Kasei Microdevices Corporation (AKM), has initiated mass production of the CZ39 series of coreless current sensors.

The CZ39 series incorporates a high-sensitivity compound Hall element that allows a response time of 100 ns, enabling current measurements to keep pace with the high switching speed of SiC- and GaN-based power solutions., which allows OEMs to leverage the smaller size of these devices, thereby reducing the weight of on-board charging systems and extending the range. The CZ39 series’ capacity to swiftly signal the system to interrupt current flow during an overcurrent condition also contributes to a robust electronic fuse, or e-fuse, implementation.

AKM has designed a unique package for the CZ39 series that achieves a primary conductor resistance of only 0.3 mΩ. Even under continuous 40 Arms current flow at an ambient temperature of 125ºC, heat generation is minimal, significantly reducing the need for extensive thermal management measures. Finally, the structure of the package provides sufficient creepage and clearance distances for use in applications above 650 V.

The CZ39 family is exceptionally resilient to high voltage and high-speed switching conditions in SiC- and GaN-based systems, ensuring continuous and highly accurate current detection even in noisy environments. For more information, please visit AKM.com.

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