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DRV5056: Position sensing using hall IC

na na78
Guru 16770 points
Part Number: DRV5056
Other Parts Discussed in Thread: DRV5055-ANGLE-EVM

Hi

Could you please advise me for selecting hall IC?

I drew simple image, could you please refer following. (Sorry for poor drawing..)

A board is rotating but B board is fixed. Speed of rotation is not so fast.

What I want to do is to stop A board at particular position.

For the simple design, I suppose to use a hall IC and a magnet that is small thin cylinder type.

And I want to realize position sensing with as accurate as possible.

(Maybe it would be trade off with the cost.)

In such usecase, what kind of hall IC do you recommend?

For exampe, switch type, linear output, or use of multiple device..

Do you have any reference designs that I can see?

BestRegards

  • 0
    TI__Mastermind 26205 points
    Hello,

    Thank you for using the TI forum.

    Since you are looking for the most accurate method, I would recommend a Hall device with a linear output (for this case, the DRV5056). For your design you would need to make sure that the DRV5056 sensor output is not saturated at the closest point to the magnet. That way you know that the desired position is reached when the voltage from the sensor is the highest.

    We have many reference designs with Hall sensors. You can see a list of them in this thread here: e2e.ti.com/.../355909. One EVM that you may find specifically interesting is the DRV5055-ANGLE-EVM (www.ti.com/.../DRV5055-ANGLE-EVM), which is a different application then you are looking for, but you may find it useful anyway.