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.

DRV5032: DRV5032 magnetic place

Part Number: DRV5032

Dears :

customer wants to put another magnetic below DRV5032 to replace a iron , they think it has better strength to close . Could you please help check if it can work ? Thanks .

  • Haiwen,

    I would advise the customer needs to be careful in how they implement this. As the magnet will oriented in the same direction as the magnet of activation, there is a chance that the magnet placed below could also trigger the sensor. Can you share what type of magnet (ferrite, neodymium N35, N45, etc.), as well as dimensions of both magnets? Also, could you share spacing between all components?

  • Hi Carolus:

    The magnet is neodymium iron boron / nickel plating,N52,Φ4*1.8mm, the top of the magnet is fixed ,the distance to DRV5032 is 2.45mm, the bottom magnet distance need to be calculated . Please help check if it can work . Thanks .

  • Carolus:

    Could I have your suggestion ? Thanks .

  • Haiwen,

    Given that this second magnet rests directly beneath the sensor, you should be able to easily calculate whether or not this magnet will trigger the sensor using the head-on calculator in the DRV5032 product folder. Provided the second magnet doesn't trigger the sensor, then the system should be fine. In the prior response, you provided the dimensions and grade of the current magnet above the sensor, but I don't see any dimensions for the magnet that your customer wants to implement below the sensor. Can you provide that information? Based on the setup, I would:

    - use the TI magnetic calculator to ensure that the first magnet does not trip the sensor. The sensor would need to be placed outside the maximum Bop distance to ensure this is the case. 

    - use the TI magnetic calculator to ensure that the top magnet does trip the sensor. As the bottom magnet will only strengthen the field, provided it doesn't trip the sensor, but the first one does, this should be fine. 

    Beyond this, we would need to simulate the actual environment. Reach out to me offline if the customer wants to go that direction.