BQ24195 - PMID Short circuit protection?

Devyn Byrnes

Other Parts Discussed in Thread: BQ24195

I was digging through the datasheet and could not find out how the BQ24195 charger IC would react when there is a short on the PMID pin (when in boost mode). Does anyone know if there is internal short circuit protection?

Thanks,

Devyn

over 9 years ago

0 Rachel Moore over 9 years ago

TI__Expert 3160 points

Devyn,

There is no boost current limit setting when the boost current is sourced from the PMID pin, so it's important to ensure the OTG load is appropriate. There is also a cycle-by-cycle current limit on the LSFET in OTG mode:

Thanks,

Rachel

0 Devyn Byrnes over 9 years ago in reply to Rachel Moore

Prodigy 60 points

Hi Rachel,

Thanks for pointing that out. I'm using the bq24195 chip, so what would happen once I reach the 6.5A limit?

When the device is powered only through VBATT(which it needs to be to run boost mode), what about the current protection on the BATFET Q4? Would this suffice as short circuit protection?

Appreciate your help,

Devyn

0 Rachel Moore over 9 years ago in reply to Devyn Byrnes

TI__Expert 3160 points

Devyn,

Yes the BATFET short protection will shut off the device with a short on PMID.

Thanks,
Rachel

0 Devyn Byrnes over 9 years ago in reply to Rachel Moore

Prodigy 60 points

Thank you Rachel!

Power management

Power management forum

BQ24195 - PMID Short circuit protection?