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TMCS1123: TMCS1107

Hiep Dinh
Prodigy 10 points
Part Number: TMCS1123
Other Parts Discussed in Thread: TMCS1107EVM

Tool/software:

What is the best hall-effect current sensor for measuring DC current, ranging from 1A to 85A with Vs=3.3V.  Thank you

  • 0
    TI__Expert 7965 points

    Hello,

    The TMCS1123C1A is the closest part to your requirements. However, the TMCS1123C1A cannot measure 85A at a 25°C ambient temperature because it will exceed the SOA (safe operating area) mentioned in the Datasheet:

    If you can keep the RMS current below 80A you should be able to use this part for your application.

    This curve assumes that you are using a layout similar to the TMCS1123 EVM linked here: https://www.ti.com/product/TMCS1123. It is also possible that you could improve the thermal performance of the TMCS1123 EVM with a better layout, or implementing active cooling.

    Let me know if you have any more questions,

    Levi DeVries

  • 0 in reply to Levi DV
    Prodigy 10 points

    Hi Levi,

    Thanks for your answer.

    I am about to layout a PCB for TMCS1107A2U using Altium.  I wonder if I can have the design package of the EVALUATION BOARD (TMCS1107EVM).

    For this application, I just need to measure current from 0 Amp to 25 Amp.  Can I design with only 1 oz. of copper thickness?

    Please advise.

    Thanks

  • 0 in reply to Hiep Dinh
    TI__Expert 7965 points

    Hello,

    The thickness for the EVM is 3oz of copper thickness on two outer layers, so I am doubtful that only 1oz of copper thickness will provide enough heat dissipation for 25A.

    I have sent you a friend request to send you a copy of the TMCS1107EVM design.

    Thanks,

    Levi DeVries

  • 0 in reply to Levi DV
    Prodigy 10 points

    I got the TMCS1107EVM design. Thanks for your helps