Infineon TLE4927C: A High-Performance Differential Hall Effect Sensor for Automotive Applications

The relentless drive towards enhanced vehicle safety, efficiency, and automation demands highly reliable and precise sensing technologies. At the heart of many critical automotive systems lies the humble yet vital task of measuring rotational speed. The Infineon TLE4927C stands out as a premier solution, a differential Hall effect sensor engineered to meet the rigorous demands of modern automotive applications.

This sensor is specifically designed for active wheel speed sensing in Anti-lock Braking Systems (ABS), traction control, and other stability management functions. Unlike single-Hall sensors, the TLE4927C incorporates two Hall elements placed a few millimeters apart. This differential setup allows it to measure the magnetic differential signal from a rotating encoder ring (or tone wheel) while effectively suppressing common-mode interference from external magnetic fields, mechanical stress, and temperature variations. This results in an exceptionally clean and accurate digital output signal, which is crucial for the vehicle's control units to make split-second decisions.

Key performance features that make the TLE4927C a preferred choice include its high sensitivity and superior accuracy across a wide temperature range (-40°C to 170°C), ensuring reliable operation in the harsh environment of a vehicle's wheel hub. Its self-calibration capability optimizes the magnetic operating points after every pulse, compensating for air gap variations, magnet aging, and mechanical offsets. Furthermore, it boasts very low jitter, enabling precise detection of even the slowest rotations, which is essential for functions like hill-start assist.

The device also integrates comprehensive protection mechanisms, such as reverse polarity protection and overvoltage/short-circuit protection on the output pin, enhancing system robustness and longevity. Its robustness against stray fields is a critical safety feature, preventing malfunctions that could be caused by external magnetic influences.

In summary, the Infineon TLE4927C is more than just a sensor; it is a foundational component for active safety and performance in the automotive industry. Its differential Hall technology provides the uncompromising reliability and precision required to keep modern vehicles safe and under control.

ICGOODFIND: The Infineon TLE4927C is a top-tier differential Hall effect sensor that sets the standard for automotive wheel speed sensing, offering exceptional accuracy, interference immunity, and robustness for critical safety applications like ABS and ESC.

Keywords: Differential Hall Effect, Automotive Sensors, Wheel Speed Sensing, ABS, Magnetic Interference Immunity