• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 62 subscribers
  • Views 606 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.

Charging of BQ25070

Masami Michino
Genius 5070 points
Other Parts Discussed in Thread: BQ25070

Dear, All

There is a question about the charging method of BQ25070.
About Figure.13 of a data sheet on page 10.
Looking at Figure.13 and after full charge looks like a trickle charge.
Is this correct?
If this is correct, there are the following questions.
In normal lithium-ion battery considered a trickle charge is not used.
Whether there is no problem to use a trickle charge the battery of LiFePO4?
It is the other question.
After full-charging, the when the voltage of the battery is lowered.
Whether the battery voltage may be considered to perform recharging after reaching the voltage of Vrch?


Thanks, Masami M.

  • 0
    TI__Mastermind 20170 points
    the bq25070 is LiFePO4 charger. The LiFePO4 has is much more stable than regular Li-ion battery chemistry. The charge topology of those two different chemistry is different.

    When charging a battery in precharge or fastcharge mode, the CHG output is pulled to GND. Once the BAT output reaches the overcharge voltage threshold, CHG goes high impedance to signal the battery is fully charged. . When the battery voltage drops below the recharge voltage threshold the CHG output is pulled low to signal the host of a new charge cycle.
  • 0 in reply to Jing Zou
    Genius 5070 points
    Hi, Jing Zou-san,

    Thank you very much for your reply.
    I answer it to the customer.

    Thanks, Masami M.