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DRV5056: Sensing Angle

Brian Wang0928
Genius 11650 points
Part Number: DRV5056

Hello, 

Could you help to check if the magnetic field moving direction is as below, is it ok to be sensed with DRV5056?

Regards

Brian W

  • 0
    TI__Genius 15290 points

    Brian,

    DRV5056 is a unipolar sensor expecting a positive B field as represented in the image below

    In the case you mention, there will be a very weak positive B field at first when the magnet begins to move closer to the sensor.  However, at some point as the magnet moves we would observe this change to a strong negative B field for the area closest to the sensor.  I expect what is intended is to measure the B field as the magnet is above the device.  This would be best done by rotating the magnet 180 degrees to invert the B field polarity observed.