XENSIV™ – TLE4972 Coreless Magnetic Current Sensor

The perfect fit for automotive inverters & high voltage industrial drives. Small package & coreless magnetic principle allow space saving & low power dissipation

Infineon introduces high precision coreless current sensor XENSIV™ TLE4972 for automotive applications

Infineon Technologies AG launches its first automotive current sensor: the new XENSIV™ TLE4972. The coreless current sensor uses Infineon's well-proven Hall technology for precise and stable current measurements. With its compact design and diagnosis modes, the TLE4972 is ideal for xEV applications like traction inverters used in hybrid and battery-driven vehicles, as well as for battery main switches.

As a result of proprietary temperature and stress compensation, TLE4972 offers state-of-the-art sensing without the negative effects caused by magnetic cores. Due to its differential sensing structure, neither core nor shield are required to protect the sensor against stray fields. The integrated EEPROM allows to customize the sensor for different applications and supports measurement ranges up to 2 kA.

To protect the system, the sensor has two separate output pins for overcurrent detection with a typical response time of less than 1 µs. Customers can program the sensitivity as well as the overcurrent limits and adapt the sensor to the system requirements. In addition, the drift of sensitivity plus offset over temperature is below 1.6 percent.

The sensor causes very low-power losses due to the magnetic sensing principle. Therefore, it can be used as a versatile and redundant solution in 400 V or 800 V battery main switches. The small PG-VSON-6 package enables a compact design, making the device ideal for traction inverters. Moreover, a second product variant in a PG-TDSO-16 is offered. Both devices have been developed according to ISO 26262 as Safety Element out of Context for safety requirements up to ASIL B.



Features

  • High accurate, scalable, DC & AC current sensing
  • Very low sensitivity error and excellent stability of offset over temperature and lifetime
  • High bandwidth provides fast response time and low phase delay
  • Differential sensor principle ensures superior magnetic stray field suppression
  • Two independent fast Over-Current Detection (OCD) pins with configurable thresholds enable fast protection mechanisms for power circuitry (typical 0.7µs)
  • Full scale up to 31 mT for high current applications
  • Configurable analog output operational modes (fully-differential, semi-differential or single-ended, uni- and bidirectional with or without ratiometricity)
  • ISO 26262 Safety Element out of Context for safety requirements up to ASIL B

Target Applications (Examples)

  • Automotive electrical drives
  • Auxiliary drives
  • Current monitoring
  • Overload and over-current detection
  • Automotive power train
  • Battery main switch
  • On board chargers, etc.

Products

TLE4972-AE35S5

leadless VSON-6 package

TLE4972-AE35D5

leaded TDSO-16 package

Design Application note - TLE4972 Sensing structure

This application note provides sensing structure implementation guidelines for external current rail sensor ofthe XENSIV™ product family.


User manual - TLE4972

This user manual is written for experienced hardware and software engineers involved in the implementation of the device into a system. It is the responsibility of the system integrator to ensure that the product is suitablefor the chosen application and that the procedures described within this user manual are correctly followed.

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