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BQ25505: Capacity of the rechargeable battery

Part Number: BQ25505

Hi sir,

What is the capacity of the rechargeable battery that BQ25505 can manage?

Thank you!

Regards,

  • Hi Frank,

    There is no capacity constraint since the BQ25505 doesn't have a safety timer; however, its output charge current (and therefore the charge time for the battery) is set by its input power.  You can estimate maximum charge current using efficiency=(VBAT_OV*ICHRG)/(VMPP*IINavg) where the maximum IINavg for this discontinuous mode PFM charger is slightly less than 1/2 of the peak inductor current of 230mA typical.

    Regards,

    Jeff  

  • Hi Jeff,

    Thanks a lot.

    very helpful.