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Bq25100 application.

gianluca peterle
Intellectual 475 points
Other Parts Discussed in Thread: BQ25100

Good morning, I wish to use the bq2510x to charge a battery and to supply a system load placed in parallel to the battery.

I wish to know what this sentence mean:

The bq2510x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.

Regards.

  • 0
    TI__Mastermind 20570 points

    The bq25100 does not have a power path. So the load needs to be connect at the output in paralle with the battery. Output current thus is shared by the load and the battery during charging. Icharge = Iout - Iload. The IC has a 10 hour safety timer which will diable the charge if the battery is not fully charged after 10 hours. If the load draws too much current such that the battery charging current is to low to charge up the battery in 10 hours, the safey timer is going to kick in and disables the charger even if your battery is not fully charged.

  • 0 in reply to Jing Zou
    Intellectual 475 points

    Thank you Zou, in my situation, I have to supply an electronic lock system of a hotel door.

    The battery has to be supplied through the induction technology, when the door is closed and has to supply the energy for the lock system when the door is open.

    Most of the time the door is closed and the battery could be charged and I think it is enough time to do that.

    My question is, if the battery reach the nominal voltage, but the system continue to draw current for functioning properly, is it possible not power down the bq25100 to supply the system load?

  • 0 in reply to gianluca peterle
    TI__Mastermind 20570 points

    As far as the safety timer is not expired, the IC should be able to charge battery if a valid input is connected, and no other fault condition occured.