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TMCS1123: Hall element material investigation request

Conor
Guru 14810 points

Part Number: TMCS1123

Hi,

Regarding device tmcs1123, could you please help clarify the following points?

  1. What is the material used for the Hall element?

  2. When used long-term, which behavior best represents the characteristic change of the Hall element?

    • Pattern 1: Gradual change over time

    • Pattern 2: Sudden change after certain operation time

  3. If the Hall element characteristics shift, are the main affected parameters “current sensitivity,” “zero-current voltage,” and “linearity”?

  4. For galvanic isolation, is it achieved solely by mold resin, or is there an internal insulating material such as polyimide tape?

  5. Please provide the dielectric thickness (DTI).

  6. If insulation is based on mold resin, do you have test results for withstand voltage degradation under high-humidity conditions?

  7. For insulation lifetime evaluation, I assume accelerated tests with high voltage are performed. How do you determine whether failures are due to wear-out mechanisms?

Thanks,

Conor

  • 0
    TI__Mastermind 25815 points

    Conor, 

    I spoke with my systems team, and the information being asked here speaks directly to the IP of the device. We cannot disclose these details. 

  • 0 in reply to Carolus Andrews
    Guru 14810 points

    Hi Carolus,

    We fully understand that the internal structure of the device is part of TI’s intellectual property and cannot be disclosed.

    We are not asking for any IP-related structural details, but only for responses that can be shared based on publicly available information.

    Of the seven questions listed above, could you please answer as many as you are able to within that scope?

    Thanks,

    Conor

  • 0 in reply to Conor
    TI__Mastermind 25815 points

    Conor, 

    Let me circle back with the systems team and see if there is anything on this list we can address for you. I will follow up shortly. 

  • 0 in reply to Carolus Andrews
    TI__Mastermind 25815 points

    Conor,

    Here's what I was able to dig up:

    1. What is the material used for the Hall element?
    - Can not answer due to IP.

    2. When used long-term, which behavior best represents the characteristic change of the Hall element?

    Pattern 1: Gradual change over time

    Pattern 2: Sudden change after certain operation time

    - Pattern 1

    3. If the Hall element characteristics shift, are the main affected parameters “current sensitivity,” “zero-current voltage,” and “linearity”?

    - Zero-current voltage

    4. For galvanic isolation, is it achieved solely by mold resin, or is there an internal insulating material such as polyimide tape?

    - Can not answer due to IP.

    5. Please provide the dielectric thickness (DTI).

    - Can not answer due to IP.

    6. If insulation is based on mold resin, do you have test results for withstand voltage degradation under high-humidity conditions?

    - Can not answer due to IP.

    7. For insulation lifetime evaluation, I assume accelerated tests with high voltage are performed. How do you determine whether failures are due to wear-out mechanisms?

    We discuss input isolation in section 8.3.2. of the datasheet.