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TIDA-010216: Max current for TIDA-010216

Chi-wen Wang
Intellectual 900 points
Part Number: TIDA-010216
Other Parts Discussed in Thread: CSD19536KTT

Tool/software:

HI,

In page 2 of “BMS Reference Designs for E2W” presentation file (https://www.ti.com/video/6350782612112), it states that the maximum current for TIDA-010216 low-side MOSFET control is 32A.  

Based on my reading of “Power MOSFET Body Diode Continuous Current Carrying Capability” (“https://www.ti.com/lit/ab/snvaa86/snvaa86.pdf?ts=1721092921795&ref_url=https%253A%252F%252Fwww.google.com.hk%252F”), the maximum current is limited by body diode continuous current of CSD19536KTT and CSD19536KTT’s max body diode continuous current seems to be much lower than 32A/5.

Could someone shade some light on how 32A max current is calculated?  Thanks.

  • 0
    TI__Intellectual 2350 points

    Hi Chi-wen,

    Thanks for reaching out.

    Yes you are right. It will cause- overheating damage when large current flow through the protection FET body diode. But BQ769x2 has body diode protection feature, meaning device will turn on the FET to avoid overheating damage. You can set the current threshold to determine when you want enable the body diode protection.

    32A max current is calculated from the conduction loss of protection FET and the thermal performance. You can design larger current with more protection FET connected in parallel and better thermal design.

    BRs

    Kian

  • 0 in reply to Kian Lin
    Intellectual 900 points

    Hi Kian,

      Thanks a lot for your prompt response.  I am just a bit curious how max 32A current is calculated and what are the limiting factors.  

  • +1 in reply to Chi-wen Wang
    TI__Intellectual 2350 points

    Hi Chi-wen,

    Sure, it's limited by heat. 010216 only has five pairs MOSFETs.

    Let me know if any questions.

    BRs

    Kian