• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 208 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

BQ40Z80: Question about functinality/golden image

Patryk Szczesny
Intellectual 290 points
Part Number: BQ40Z80
Other Parts Discussed in Thread: EV2400, BQSTUDIO

Hi TI Team,

I'm assembled our custom BMS PCBs, that include a BQ40Z80. Previously I had an issue where the chip was not able to communicate with an EV2400 module, but now I had sucesfully managed to connect to the BMS through SMBus.

When I used the toggle dsg Fet command within the Battery managment studio, it did toggle the discharge mosfet and I could see correct voltage and power a small circuit though it. 

What I'm having questions about is, why is the dischrage MOSFET not on at start. Is it like this by default? Is this where I need to start working on a 'golden image', setting up all the parameters etc and program it into the BQ40Z80?

Kind regards,

Patryk Szczesny.

  • 0
    TI__Guru** 105590 points

    Hello Patryk,

    Yes you should set the FET_EN in the Mfg Status Init register so the gauge has control of the FETs at startup. Depending on your settings for the protections in your golden image the gauge will toggle the FETs on it's own. You will not be able to manually toggle the FETs once the gauge is fully configured and FET_EN = 1.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    Intellectual 290 points

    Thanks for the feedback Wayatt. I'm reading on the setting up of the golden image now, would you know of any helpful links for using the bqStudio?

    Kind Regards,

    Patryk Szczesny.