High-Precision Current Sensing with the Infineon TLI4971-A120T5-U-E0001 Hall-Effect Sensor

Accurate current measurement is a cornerstone of modern electronic systems, essential for optimizing performance, ensuring safety, and enabling precise control in applications ranging from industrial drives to renewable energy inverters. The Infineon TLI4971-A120T5-U-E0001 represents a significant leap forward in this field, offering a high-precision, fully integrated current sensing solution based on the Hall effect.

Unlike traditional shunt resistors, which introduce power losses and require isolation, the TLI4971 is a contactless current sensor that measures the magnetic field generated by a current-carrying conductor. This core-less design eliminates the need for a magnetic concentrator, reducing size and cost while enhancing reliability. The device is engineered for high-accuracy measurement, boasting an impressive total output error of less than ±2.5% over the entire temperature range (-40°C to 125°C) and lifetime. This is achieved through advanced signal conditioning, integrated temperature compensation, and a dedicated signal path for overcurrent detection.

A key feature of this sensor is its programmable overcurrent detection with two independent thresholds. This allows designers to implement robust hardware-based protection mechanisms that can trigger a system shutdown within microseconds, safeguarding expensive power electronics like IGBTs or MOSFETs from damage caused by short circuits or overloads. The sensor provides an analog output proportional to the measured current and a separate digital signal (OCD) that instantly indicates when a threshold is breached.

The TLI4971-A120T5 is designed for bidirectional DC and AC current measurement up to 120 A, making it exceptionally versatile. Its high bandwidth of up to 250 kHz enables precise current monitoring even in fast-switching applications like motor control, ensuring smooth and efficient operation. The compact, surface-mountable TDSO-5 package simplifies board design and is optimized for automated assembly, reducing manufacturing complexity.

In summary, the Infineon TLI4971-A120T5-U-E0001 sets a new benchmark for performance and integration in current sensing technology. Its combination of unparalleled accuracy, robust protection features, and a compact form factor makes it an ideal choice for demanding applications in industrial automation, automotive systems, and solar power generation.

ICGOODFIND: The Infineon TLI4971-A120T5-U-E0001 is a premier, core-less Hall-effect current sensor that delivers exceptional accuracy (±2.5%), integrated overcurrent protection, and bidirectional sensing up to 120A, making it a top-tier solution for high-performance power control systems.

Keywords:

1. High-Precision

2. Contactless Sensing

3. Overcurrent Detection

4. Bidirectional Measurement

5. Hall-Effect