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BQ24640: Question about charge current

Kazuhiko Hirano
Genius 12868 points
Part Number: BQ24640

Hello,

My customer has some questions as follows.

Q1: 7.3.2 Output Current Regulation
Regarding the output current regulation, which is the set maximum charging current, peak current, valley current, or average current?

Q2: Charge current regulation accuracy
Datasheet specifies charge current regulation accuracy at VIREG_CHG = 40mV, 20mV, 5mV and 1.5mV. How about if VIREG_CHG > 40mV? The charge current regulation accuracy gets better? Could you show the data of “charge current regulation accuracy” for VIREG_CHG range = 50mV to 100mV?

Best regards,

K.Hirano

  • 0
    TI__Genius 16760 points

    Hello Kazuhiko,

    Kazuhiko Hirano said:
    Q1: 7.3.2 Output Current Regulation
    Regarding the output current regulation, which is the set maximum charging current, peak current, valley current, or average current?

    The Output current regulation sets the maximum current.

    Kazuhiko Hirano said:
    Q2: Charge current regulation accuracy
    Datasheet specifies charge current regulation accuracy at VIREG_CHG = 40mV, 20mV, 5mV and 1.5mV. How about if VIREG_CHG > 40mV? The charge current regulation accuracy gets better? Could you show the data of “charge current regulation accuracy” for VIREG_CHG range = 50mV to 100mV?

    We don't have the date to provide an accurate answer.

    Best Regards,

    Christian.

  • 0 in reply to Christian Moyer
    TI__Genius 12868 points

    Christian,

    Thank you for your responses.
    Let me confirm a bit more.

    Q1:
    The maximum current means peak current?

    Q2:
    Even if TI does not have data to be share, with VIREG_CHG > 40mV, the charge current regulation accuracy could theoretically be higher?

    Best regards,

    K.Hirano

  • +1 in reply to Kazuhiko Hirano
    TI__Genius 16760 points

    Hello Kazuhiko,

    Kazuhiko Hirano said:
    Q1:
    The maximum current means peak current?

    Yes

    Kazuhiko Hirano said:
    Q2:
    Even if TI does not have data to be share, with VIREG_CHG > 40mV, the charge current regulation accuracy could theoretically be higher?

    Yes, theorectically it could be higher, but without the data I can't confirm.

    Best Regards,

    Christian