• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 62 subscribers
  • Views 640 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

BQ27441-G1: BQ27441-G1 / Minimum measurable current

S.Satoshi
Guru 21675 points
Part Number: BQ27441-G1

Hi,

This may be basic question but let me ask for my understanding. Please let me know the minimum measurable current when 10mohm sense resistor is used. I think that it can be calculated by the resolution of Integrating ADC (Coulomb Counter).

Best Regards,

Satoshi / Japan Disty

  • 0
    TI__Guru 51466 points

    The gauge reports currents with a 1mA resolution so that's the practical limit. The coulomb counter ADC has an effective resolution of 16 bit and a range of 50mV so each LSB equals 0.76uV --> with a 10mOhm resistor this equals 76uA (theoretical).

  • 0 in reply to Dominik Hartl11
    Guru 21675 points
    Hi Dominik,

    Thank you for your response. I also guess that the minimum current gauge can report will be 1mA because the unit of AverageCurrent() in standard command is [mA].

    Then I have one more question. The gauge can measure the discharge current lower than 1mA and count it though the minimum current can be reported is 1mA. Is my understanding correct?

    Best Regards,
    Satoshi
  • 0 in reply to S.Satoshi
    TI__Guru 51466 points

    Hello Satoshi,

    > The gauge can measure the discharge current lower than 1mA and count it though the minimum current can be reported is 1mA. Is my understanding correct?

    This is correct.

    Best Regards,

    Dominik.