Infineon will introduce a new range of current sensors

     Infineon Technologies is launching a new family of current sensors and will present its first product members at this year's PCIM show. The series will include precisely stable coreless Hall sensors. They are highly flexible because customers can individually program this product parameter, such as current range, overcurrent threshold and output mode. The first product, XENSIV TLI4971, has A measurement range of ±25 A to ±120 A. It is suitable for industrial applications such as electric drives up to 50 kW or photovoltaic inverters. Other members of the follow-up product series in 2020 will qualify for automotive applications.

     Coreless open-loop current sensors provide accurate and stable current measurement - provided as an analog output voltage. Based on Infineon's market-proven temperature and stress compensation, sensitivity errors are as low as 2% at room temperature. With single-point in-system calibration, it can be reduced to less than 2%. In addition, differential measurements using two Hall units ensure high accuracy even in noisy environments and have crosstalk from adjacent current lines or magnetic stray fields.

     The TLI4971 has two output pins for fast overcurrent signal detection. Customers can program the threshold level of the overcurrent signal so that it can be used for system requirements without the need for additional external components. Signals can be used for early warning and shutdown systems. In addition, the device can provide a signal in the case of overvoltage or undervoltage of the supply voltage.

     Due to its coreless design, the TLI4971 can be used with an 8x8x1 mm leadless QFN package (TISON-8). The current rail is arranged to provide best-in-class thermal performance for currents up to 120 A at no additional cost. The device is suitable for high voltage applications and has current isolation up to 1.1 kV (maximum repeated isolation voltage V IORM).