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BQ24195: Charging a Supercap as a Li-Ion

Darren Jenkins
Genius 10946 points
Part Number: BQ24195
Other Parts Discussed in Thread: BQ24130

Battery Charger team,

Our customer has designed a battery charge circuit based on the bq24195 for Li-Ion.  In some of their applications, they want to change to use a 2S Super-Cap.  I know we have the devices specifically designed for Super-Cap, but can you tell me if it's possible to use this charger to charge a Super-Cap, configured to charge with a Li-Ion profile?

Are there concerns, or is it simply that it will take longer to charge than with something like a bq24130?

If it won't work, can you explain why?

Thanks,
Darren

  • 0
    TI__Mastermind 49641 points
    Hi,

    Super cap charging begins in one of two phases (depending upon super capacitor voltage): constant current (fast-charge current regulation), and constant voltage (fast-charge voltage regulation). In addition to the two phases, BQ24195 also supports trickle charge and pre-charge when the BAT voltage is low. Please refer to the BQ24195 charging profile on the d/s for the details.

    It is ok to use BQ24195 to charge super cap. Charging could take longer time if super cap voltage is low. The maximum charge voltage for the device is 4.4V. Please make sure this is ok for your application.

    Thanks,

    Ning.