• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 158 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.

BQ28Z610: First part of discharge do not update the RSOC

Stefano Sivera
Prodigy 221 points
Part Number: BQ28Z610

Dear Support team:

I completed the learning cycle and now I have cheching the BQ on my real application.

I see the wrong RSOC counting for first 800 samples: RSOC is fixed at 100%

Attached log file and registers setting.

Thank You 

Regrads

Stefano 

13042022_DSC_NEW_REG_Gear.zip14042022.gg.csv.zip

  • 0
    TI__Guru** 105770 points

    Hello Stefano,

    For highly pulsed loads it can be difficult for gauging, I took a look through the logs and it appears the True RemCap is tracking more accurately than the filtered. The filtered RemCap uses the smoothing engine to reduce jumps, but the smoothing engine has additional requirements. I think you may be going in and out of the discharge mode, this is causing issues with the smoothing engine.

    Make sure your Dsg Current Threshold is also set slightly higher than your quit current. Also please try increasing your Dsg Relax Time to greater than 5s, so we don't keep switching modes and interfering with the smoothing engine.

    Also from your log I noticed the RX bit never toggles, this means you will not get Ra table updates during operation of the gauge, so during the lifetime of the gauge it may need to have a continuous discharge without pulses to update the Ra table.

    This application report may be helpful for you as well: https://www.ti.com/lit/an/slua948/slua948.pdf?ts=1649950570770&ref_url=https%253A%252F%252Fwww.google.com%252F

    Sincerely,

    Wyatt Keller