Infineon Technologies TLI4971 XENSIV™ Magnetic Current Sensors

Infineon Technologies TLI4971 XENSIV™ Magnetic Current Sensors is a high-precision current sensor for bi-directional AC and DC measurements. The devices have an analog interface and two fast overcurrent detection outputs. These support protection of the power circuitry. Galvanic isolation is provided due to magnetic sensing principle. Infineon's monolithic Hall technology enables accurate and highly linear measurement of currents with a full scale up to 120A. Negative effects like saturation and hysteresis are commonly known from core-based sensor techniques are not present in the Infineon open loop, core-less sensors principle. The smart current rail design (double U-shape) combined with a differential signal sensing makes the current sensor robust against stray fields.


  • Measurement up to 70ARMS at 690VRMS within ±120A FSR
  • Typical error at 25°C <2 percent
  • Current rail resistance specified at 225µΩ typical
  • Analog output signal with 120kHz bandwidth
  • Fast overcurrent detection up to 2 x IFSR (typ. response time 1µs)
  • Ultra-low power loss due to low resistance of current rail
  • Reliable current measurement over lifetime (no re-calibration)
  • Functional isolation for high-voltage application
  • Easy and compact package allows high power density design


  • Industrial inverter and drives up to 690VRMS
  • Battery management
  • Photovoltaic inverters
  • Power supplies
  • Overload or overcurrent detection in high-voltage power circuits
  • White goods
  • Power tools
  • Robot applications

Block Diagram

Block Diagram - Infineon Technologies TLI4971 XENSIV™ Magnetic Current Sensors


Published: 2019-08-19 | Updated: 2023-09-12