Accurate 3D Measurement of Magnetic Fields for Automotive Gear Selector : Page 6 of 6

October 10, 2016 //By Hannes Birk and Sigmund Zaruba, Infineon Technologies
Accurate 3D Measurement of Magnetic Fields for Automotive Gear Selector
The TLE493D-W1B6 magnetic sensor provides accurate three-dimensional (3D) magnetic field measurement, extremely low energy consumption and integrated magnetic field alert functionality. Potential automotive applications for this technology are gear selectors, control elements, top column modules and applications involving linear movements or angle measurement.
the lower one, the sensor initiates an interrupt and wakes up the microcontroller (Figure 6). When the master (microcontroller) becomes active, it reads out the magnetic field values from the registers. The corridor can be set for all three axes at any time and independently of each other. This allows the thresholds to be adjusted in reaction to changes in mechanical positions.

Figure 6: Magnetic field corridor (top)
for the magnetic field alert function

Using the magnetic field alert means that the entire microcontroller system can be set to sleep mode, with the sensor only waking the microcontroller and the connected systems when the magnetic position indication changes. This enables the development of systems that save a great deal of energy, but are nevertheless capable of reacting quickly to a change in position.

Summary

The TLE493D-W1B6 sensor provides precise and energy-efficient 3D magnetic field detection for various applications. Flexible operating modes offer dedicated and scalable system designs with a wide measurement range for precise position determination and very low power consumption. The integrated magnetic field alert can wake up the microcontroller systems in order to inform them of a change in position.

Development samples of the TLE493D-W1B6 are available. Volume production is planned for the end of 2016.

www.infineon.com/3Dmagnetic

About the authors

Hannes Birk studied electrical engineering at the Constance University of Applied Sciences, Germany and earned an MBA from the TiasNimbas Business School, Netherlands. He is responsible for 3D magnetic sensors and linear Hall sensors at the Automotive Division of Infineon Technologies in Neubiberg, near Munich, Germany. Email: hannes.birk@infineon.com; Phone: +49 89 234 26320

Sigmund Zaruba studied physical engineering in Munich, Germany. He has been with Infineon Technologies for 15 years as an application engineer and is currently responsible for 3D magnetic sensors and Hall switches at the Automotive Division of Infineon Technologies, Neubiberg near Munich, Germany. Email: sigmund.zaruba@infineon.com; Phone: +49 89 234 26648

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