Infineon and Swoboda are developing current sensor modules for automotive traction inverters and battery management systems.

The deal combines Infineon's sensor ICs with Swoboda's expertise in sensor modules, and the first product is aimed specifically at Infineon's 'HybridPACK Drive G2' three-phase traction motor drive modules.

Later models will cover more general applications.

The infineon-specific model is called the Swoboda CSM510HP2, and is an encapsulated current sensor module is based on Infineon's TLE4973 coreless current sensor IC. Its total sensing error is below 2%, said Infineon.

In use, it is shaped to be inserted into correspondingly profiled slots already moulded into the drive modules (photo below), when each sensor head enters a hole though its corresponding busbar.

"The sensor module and the cavity in the power module enable vertical insertion of TLE4973 inside the busbar, optimising the differential magnetic fields at the two Hall cells of the sensor thanks to the auto-alignment defined by the design of the cavity," infineon told Electronics Weekly.

There are two versions: the single-ended output CSM510HP2S and the differential output CSM510HP2D. Both run from 5V.

Measurements are up to ±1,600A and there is a dedicated over-current indication output that responds in <1.7µs. Bandwidth is above 120kHz.

Functional safety rating is ASIL-B (SEooC), and end-of-line calibration is available.

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