Infineon TLI4970 current sensor

Claimed to require just one-sixth of the board space taken up by other sensors, the Infineon TLI4970 current sensor measures alternating and direct currents up to ±50 A. The digital sensor does not require external calibration.

Due to implemented stray field suppression, the product is robust against external magnetic fields. It continues to measure with absolute precision even after years of continuous operation, with its efficiency remaining constant.

It also provides fast overcurrent detection at a preconfigurable level. To keep latency short, the sensor provides a parallel signal path. This allows the error condition detected by the sensor to be processed with a delay of less than 3 µs directly in the driver stage or in the microcontroller.

To fine-tune the overcurrent threshold to the requirements of the application, the system developer can program both the current value and the subsequent filtering in the sensor. The sensor transmits the measured values via the digital SPI. It integrates differential amplifiers, filters and signal processing and permits the implementation of a galvanically isolated measurement up to 600 V and up to 3600 V test voltage.

Offered in a TISON SMD package, measuring 7 x 7 x 1 mm, the sensor is suitable for solar inverters, charging devices and power supplies, as well as for electric drives and for controlling energy-saving LED lighting units.