TLE49411HALA1

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The TLE49411HALA1 is a Hall sensor switch specifically designed for use in automotive applications. It operates by measuring the magnetic field of a vehicle’s permanent magnets, and utilizing the magnetic field’s polarity to detect specific instructions. In turn, the device can carry out functions such as open/close doors, open the trunk, and power the window. This switch features two Hall elements (bottom and top) surrounded by two air gaps, which provide an approximate switch-point setting of 0.55mT. As such, this type of sensor switch is ideal for precise, low-noise motion and position sensing.

The TLE49411HALA1 is designed to operate in two states - full-ON and off. To achieve this, the sensor utilizes the principle of magneto-resistive measurement. This is a phenomenon whereby a change in flux density (magnetic field strength) produces a corresponding change in electrical resistance. In the case of the TLE49411HALA1, two Gaussian polarization layers are separated by two insulation layers and an internal Hall element. In this polarized state, a change in the magnetic field strength results in a change in the resistance of the Hall element, which in turn triggers the connected switch. This makes the TLE49411HALA1 highly suitable for applications with tight thermal requirements and motion and position sensing.

As indicated, the TLE49411HALA1 is designed for automotive applications. However, its features make it suitable for other industries as well, such as industrial automation and consumer electronics. Due to the device’s small form factor, it is also perfectly suited for embedded applications. Furthermore, its Hall elements are specifically designed to minimize airgap flux leakage, making the switch ideal for applications requiring clean signal cut-off and no-bounce operation.

To protect the TLE49411HALA1 from external voltage excursions or spikes, the device features reverse battery protection and integrated ESD protection. Additionally, the built-in open-drain MOSFET ensures a current consumption of only 2.5µA at 5V. This low current draw is ideal for battery-powered applications, as it ensures a long operating life and fast switching.

The TLE49411HALA1 is thus an ideal choice for automotive and industrial applications, as well as embedded systems requiring accurate, low-noise motion and position sensing. Its reverse battery protection and low power draw add to its appeal, increasing its versatility.

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