Infineon — XENSIV™ TLE4971 Current Sensor

Infineon has introduced the compact XENSIV™ TLE4971 family of magnetic current sensors, which provide a robust and accurate solution for chargers, motors and inverters in automotive applications.  

The TLE4971 is a high-precision, coreless current sensor for bi-directional ac and dc measurements. Providing an analog output signal with 210 kHz bandwidth, the product features two fast over-current detection outputs for protection of the system’s power circuitry. The sensor can be used for current monitoring, and for overload and over-current detection.  

Offering system designers the opportunity to save space, this new 3.3 V device is supplied in a TISON-8 leadless package that has a footprint of 8 mm x 8 mm, and in four pre-programmed measurement-current ranges: 25 A, 50 A, 75 A and 120 A.  

The TLE4971 is part of the XENSIV family of coreless, open-loop current sensors, which are less bulky and cost less than core-based current sensors. Based on Hall effect technology, the sensors’ analog output signal is highly linear over temperature and lifetime, and provides galvanic isolation. Since the XENSIV current sensors have no iron core or flux concentrator, their measurement signal shows no hysteresis, and does not suffer from saturation. 

Differential current sensor measurement with two Hall cells ensures high accuracy even in a noisy environment that is subject to crosstalk from adjacent current lines or magnetic stray fields. System designers can program the sensitivity of the sensor, as well as the threshold levels of the two dedicated over-current signals, to adapt their operation to the requirements of specific applications without the need for external components.  

The TLE4971 is AEC-Q100 Grade 1 qualified.