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DRV5053-Q1: Application questions

Jiawei Hu1
Expert 6065 points
Part Number: DRV5053-Q1
Other Parts Discussed in Thread: DRV5053, DRV5055-Q1, DRV5055

Tool/software:

Hi team,

For below application, the magnet is a bar magnet, N and S are the two ends of the magnet, and the magnetic field strength in the middle is 0.

Questions:

  • The Hall sensor moves to N or S, which is the maximum strength of the Hall induction magnetic field. What is the requirement for the magnet surface magnetism?
  • When the Hall sensor moves from the N pole to the S pole, the induction is 0 when it moves to the middle of the magnetic field. Is there any requirement for the rate of change of the surface magnetic field?
  • For DRV5053/5055/5057, what is the maximum value of the Hall sensor's induction of magnetic field strength? Is there any requirement for the rate of change of the magnetic field?

BR

Jiawei

  • 0
    TI__Expert 7950 points

    Hi Jiawei,

    Thanks for posting to the Sensors forum.

    As the magnet moves from the N to S pole above the sensor, you will see a Z axis component of the magnetic field vector similar to the plot shown below

    Jiawei Hu1 said:
    The Hall sensor moves to N or S, which is the maximum strength of the Hall induction magnetic field. What is the requirement for the magnet surface magnetism?

    The DRV5053/5055/5057 are all available in different sensitivity options that have different linear magnetic sensing ranges. I've included an example below from the DRV5055-Q1 datasheet. The general guideline here is to select the highest DRV5055-Q1 sensitivity option that can measure the required range of magnetic flux density.

    Jiawei Hu1 said:
    When the Hall sensor moves from the N pole to the S pole, the induction is 0 when it moves to the middle of the magnetic field. Is there any requirement for the rate of change of the surface magnetic field?

    The DRV5053 and DRV5055 have a sensing bandwidth of 20kHz, which describes the fastest changing magnetic field that can be detected and translated to the output.

    Jiawei Hu1 said:
    For DRV5053/5055/5057, what is the maximum value of the Hall sensor's induction of magnetic field strength? Is there any requirement for the rate of change of the magnetic field?

    I believe this question is addressed in the two answers above regarding the different linear magnetic sensing ranges for different variants of the devices and the sensing bandwidths.

    Our online magnetic simulation tool, TI Magnetic Sense Simulator (TIMSS) may be helpful for simulating the magnetic fields in this application. Here you can easily configure magnet shape/type/placement and sensor placement and simulate
    The tool is available here: https://webench.ti.com/timss/

    Please let me know if you have any questions about TIMSS.

    Best regards,

    Jesse