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BQ24232: Q2 State when battery is fully charged

leinho
Expert 1230 points
Part Number: BQ24232
Other Parts Discussed in Thread: BQ27426,

I am writing to ask what's the state of Q2 (from functional block diagram), or in other words, what powers OUT when the charging is complete. I have found some odd situations in the following Setup:

BQ24232 EVM and BQ27426 EVM. 

I am using BQ27426EVM to monitor the battery, and the charging, but I found that the voltage drop in RSense is much higher than expected when charging is complete. 

Thanks for your help.

  • 0
    TI__Mastermind 21590 points
    Hello,
    When charging is complete, as is the same when charging is happening, OUT is powered from IN. IF the output voltage drops, then the device goes into supplement mode in which the remaining current which the input can't provide will be supplied by the battery.