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BQ24091: Input Current and Charge Current

Nicky Lim
Genius 3195 points
Part Number: BQ24091

Hello,

When I set Iinmax = 1A, Ichg = 1A but Vin source connected to Note PC (Iinmax = 500mA)

1. Can I use Fast Charge (1A charging)? or charge current is limited only 500mA?

2. If Battery pulled 1A by force, It can make Host(Note PC) damaged? 

Could you let me get your answer ASAP?

Regards,

Nicky

  • 0
    TI__Guru 71166 points
    Hi Nicky
    The bq24091 has Input DPM that will limit output current when input voltage decreases due to load, see data sheet section 9.3.10. Also figure 8 page 11.
    If the host connection is limited to 500mA the input voltage will drop and bq24091 will limit output current to keep the input voltage above about 4.4V.
    Damage to a correctly designed host USB port in this situation is not possible.