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BQ51003: Charge rate

Marvin Gasis Arcangel
Genius 9785 points
Part Number: BQ51003
Other Parts Discussed in Thread: BQ51013, BQ25120A, , BQ25100, TIDA-00318

Hi Team,

I have a question regarding this device. 

I would like to know what is the charging current range of BQ51013/B? Also, I plan to use BQ25120A with BQ51013/B for a 3.7V, 200mAh LiPo battery. The datasheet appears to be a match. However, I'm not sure about the 200mAh capacity. does the battery capacity matter? or it does not matter as long as the chemistry match?

Thanks!

Regards,

Marvin

  • 0
    TI__Guru 68716 points

    Hi Marvin

    The BQ51003 is a Wireless Power 5V Power Supply designed for max output current of 500mA, set by ILIM pin.  As a power supply the min current is 0mA.  

    Unit can be used to supply a battery charger IC, see TIDA-00318. This design uses the BQ25100 charger.  But the BQ25120A should also work in this configuration.

    Marvin Gasis Arcangel said:
    I'm not sure about the 200mAh capacity. does the battery capacity matter?

    The charge current is normally expressed as a percentage of battery capacity.  Capacity (C) = 200mAh, and charge current is 0.5C or 100mA.

    Marvin Gasis Arcangel said:
    or it does not matter as long as the chemistry match?

    The charge current would need to match recommendation from data sheet.  Higher charge currents could damage the battery.