• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 31 subscribers
  • Views 525 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV5033: hall switch for push button

Tiger Wang
Expert 1535 points
Part Number: DRV5033
Other Parts Discussed in Thread: DRV5012, DRV5032

Dear Sir,

I want to use DRV5033 as  non-contact push-button, I also use the tool to calculate the shape ,thickness.materials, but it seem DRV5033 sensitivity is not good for push button.

The travel distance is about 1.5mm, ferrite, diameter is 2mm-3mm, 0.5mm-1.0mm thickness.

Can you give me some suggestion for push-button design with TI hall switch?

Best regards.

  • 0
    TI__Expert 5705 points

    Hello David,

    I would recommend looking at the DRV5012 for your design. This device is a low-power latch and it is sensitive only to magnetic field polarity. Since field magnitude is not as important, the magnet can be placed very close to the sensor to produce a compact design. Please see figure below for concept.

    Best Regards,

    Harsha

  • 0 in reply to Harsha Munikoti
    Expert 1535 points

    Dera Harsha,

    Thanks for your support.

    In fact, the direction of the ferrite  and hall switch look like this picture. can DRV5012 use this way?  the travel distance only 1.5mm.

    Thanks.

  • 0 in reply to Tiger Wang
    TI__Expert 5705 points
    Hi David,

    No the DRV5012 would require lateral movement of the magnet as shown in my last post. You will likely need a magnet with thickness <<1.5mm to change the output state of the DRV5012 over the 1.5mm travel.

    For the orientation you have shown I would recommend looking at the DRV5032ZE which is a low power Hall-effect switch. The ZE has the lowest sensitivity in the DRV5032 family so you can place the magnet close to the sensor.

    Best Regards,
    Harsha