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BQ24610: Adapter current lower than the maximum load current

FranMartin
Intellectual 600 points
Part Number: BQ24610

Hi,

What happens if the maximum load current is set to 7A, for example, and the adapter only provides 5A, for example? Will the BQ24610 work properly charging at 5A the battery or will it behave abnormally?

Thank you.

  • 0
    TI__Guru 57341 points
    Hi,

    The bq2461x features Dynamic Power Management (DPM) which reduces battery charge current when the input power limit is reached to avoid overloading the AC adapter when supplying current to the system and the battery charger simultaneously. By using DPM, the battery charger reduces the charging current when the input current exceeds the input current limit set by ACSET. The current capability of the AC adapter can be lowered, reducing system cost. Please refer to 9.3.3 Input Adapter Current Regulation on the d/s for the details.

    Thanks!
    Please click "This Resolved my issue" button if this post answer your question.
  • 0 in reply to Ning T
    Prodigy 220 points

    Hi Ning T

    I have a problem.

    Charging current is lower than expected current.

    ISET1 is 0.4V. that is, Maximum fast charge current is 2A.(But mearsured charging current is 1.3A)

    ISET2 is 0.3V.

    ACSET is 1.6V, Rac=0.2ohms. that is, Input Adapter current Regulation is 4A

    depend on your reply, the reason is that DPM is working.

    So, if it is right, How to modify without using DPM by ISET1,2,ACSET?

  • 0 in reply to Taehwan Choi
    TI__Guru 57341 points
    Hi,

    Please verify your design using the bq246xx calculation tool downloadable at www.ti.com/.../toolssoftware. Besides the charging current, please also measure the input current and check if DPM is effective. It is normal that charging current is lower than the defined value under DPM.

    Thanks!
    Please click "This Resolved my issue" button if this post answer your question.