• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 50 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.

BQ24171: Charging current of 125mA for a 3S lithium-ion battery

JQlane
Prodigy 10 points
Part Number: BQ24171

Tool/software:

Hello experts,

I have a question regarding the use of the BQ24171 charge controller. I want to charge a 3S lithium-ion battery with a very low charging current of 125mA.

My questions are:

  • Is it possible to achieve a charging current of only 125mA for a 3S lithium-ion battery with the BQ24171?
  • Are there any specific issues or challenges I need to be aware of with this low charging current ?
  • If it is not possible to achieve this charging current , I would be very grateful for any recommendations or alternatives.

Thank you in advance for your expertise and help.

Best regards,
Johannes

  • 0
    TI__Guru*** 146695 points

    Hi Johannes,

    Yes, you can charge will low charge current but you must increase the size of the sense resistor SRP and SRN.  Otherwise, the accuracy of charge regulation will be poor.

    Below is the reg accuracy spec has a function of voltage drop = ICHG*Rsns

    Regards,

    Jeff