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BQ24105: power path

Jaeseung Jeong1
Prodigy 130 points
Part Number: BQ24105
Other Parts Discussed in Thread: BQ25713, BQ24773, BQ24610, BQ24133

The power path was configured as shown below.

I wonder if the system can provide sufficient current when the battery voltage is discharged (Adapter is removed) through the parasitic diode of P-FET(Q5).

Is it OK to replace the P-FET switching circuit with one schottky diode?

  • 0
    TI__Mastermind 40305 points

    Dear Jaeseung,

    You can connect a diode from the Battery to the System and from the Input to the System. However, I would be worried about the power dissipation the diode would have depending on how heavy your system load is.

    If you have high current through these diodes, I would recommend a power path charger for your application such as the bq25713 or bq24773 for the NVDC powerpath or the bq24610, bq24133, or the bq2417x for higher current and traditional powerpath.

    Thanks,

    Mike Emanuel

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