Compact current sensors help shrink on-board chargers

Compact current sensors help shrink on-board chargers

New Products |
By Christoph Hammerschmidt

Infineon expands its sensor portfolio for automotive applications with the new Xensiv TLE4971 family. These 3.3 V devices are the next generation of TLI4971 products, available in a TISON package with integrated rail and in four different pre-programmed current ranges between 25 and 120 A. With its compact design and state-of-the-art sensor technology, the TLE4971 is considered ideal for automotive applications such as on-board chargers (OBC), high-voltage auxiliary drives and charging applications. In addition, the current sensor is also suitable for industrial applications such as DC chargers for electric vehicles, industrial drives, servo drives and PV inverters.

The Xensiv TLE4971 devices provide accurate magnetic current measurement based on proprietary temperature and voltage compensation, without the negative effects of magnetic cores affected by hysteresis or saturation effects. Due to the differential measuring principle, neither a core nor a shield is required to protect against stray fields. In addition, the sensors are ideal for applications that use wide-band-gap solutions such as gallium nitride (GaN) and silicon carbide (SiC). The integrated EEPROM allows users to customise the sensor’s overcurrent detection (OCD) values and deglitch filters for different applications.

The compact PG-TISON-8-5 package allows the same design for different applications. With a minimum resistance of 220 µΩ and a parasitic inductance of less than 1 nH, system losses are reduced, enabling higher efficiency and accuracy. In addition, the package provides a high dynamic range, tolerates high current spikes and offers excellent thermal dissipation. The components are fully qualified up to 125°C (Automotive Quality Standard AEC-Q100 Grade 1) and provide improved output accuracy. To support industrial applications, all sensor variants are available as standard and UL certified versions.

The components are available now and will be on display at electronica 2022.



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