hall sensor

Hall sensors that use the Hall effect detect by placing a magnet vertically, so it is a simple method to pinpoint the vertical magnetic field, but generally the magnet is placed directly above the sensor and close to the sensor. Recommended distance mounting limits design freedom. Although the cost of the sensor alone is low due to its simple configuration, it is not suitablefor angle detection because it cannot detect180 ° to 360° with a single sensor.

MR sensor

MR sensors such asAMR,GMR, andTMRdetect by placing magnets horizontally, so multiple placement patterns can be considered, increasing the degree of freedom in design. Compared to Hall sensors, it is highly sensitive because it adapts to absolute rotation angles, and a single sensor can detect 180° to 360°. However, compared to Hall sensors, the design is more complex and the cost of the sensor alone is higher.

Among these MR sensors, the TMR sensor uses the tunnel magnetoresistive effect, and compared to AMR and GMR sensors, it is less affected by temperature changes and has extremely high magnetic sensitivity, so it is suitable for severe applications that require highly accurate detection. But it can be considered. In addition, its low power consumption makes it a very effective product especially for applications with strict power consumption.As will be explained in a later section, Infineon 's TMR sensor is also suitable for applications that require ASIL-D in accordance with ISO26262. You can hire us.

Output amplification

Due to its high magnetic sensitivity, TMR sensors can achieve large output amplitudes of up to 0.37V/V without an amplifier, offering cost benefits compared to AMR and GMR sensors with built-in amplifiers.

Suppression of temperature drift

Very low temperature drift reduces external calibration burden on the user.

Reduced current consumption

TMR's technology reduces current consumption during operation to 2.5mA (max), making it suitable for applications with strict current consumption.

Compliant with ISO-26262

The TLE5501 series has two variations: TLE5501 E0001 and TLE5501 E0002.

Both are compatible with the AEC-Q100 automotive standard, but E0002 in particular is a product developed in full compliance with ISO-26262 and has achieved ASIL-D as a standalone product.

Evaluation kit/evaluation board

The TLE5501 evaluation kit/board consists of the following:

➀ Rotary knob with built-in magnet
➁ TLE5501 Angle Shield
③ Infineon XMC1100 BootKit (equipped with microcontroller)

Although it is possible to evaluate this 3-piece set, it is also possible to evaluate only the ➁TLE5501 Angle Shield equipped with TLE5501.

When evaluating a 3-piece set, by connecting ③ Infineon XMC1100 BootKit to a PC, it is possible to verify sensor detection information on the GUI as shown below.

TLE5501 evaluation kit/evaluation board configuration

GUI

Magnetic design simulation tool

It is possible to verify the magnet design using a simulation tool for the magnet used in combination with the sensor.

The worst-case angular error caused by the effective air gap (distance from the magnet surface to the sensor) considering the specific magnet size and residual magnetization (radial magnetization), and the tilt and eccentricity of the magnet and sensor element with respect to the rotation axis. can be simulated.

*This simulation tool simulates errors purely due to assembly tolerances, and does not take into account additional tolerances based on sensor element temperature and lifetime drift.

Document related

We have a wide range of user manuals and application notes available for our angle sensor products, including the TLE5501.

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