Tool/software:
Hi Ti Experts,
we are using the bq25756 Buck Bosst Charge Controler in a USB-C application.
We charge a 13S battery.
We want to use the the EN_IBAT_LOAD function to discharge the capacitors.
I think that is working so far.
During the tests I connected the battery to the charger. EN_CHG was not activated.
EN_IBAT_LOAD was activated. I could see a current of about 30mA flowing out of the battrey into the
charger PCB.
In the datasheet is written that the bq25756 sinks the current from SRN to GND.
I measured the voltage drop over the R65 which is connected to SRN. Here I could measure almost nothing:
Because I know the current is flowing, I measured the voltage drop over the R64. This resistor is connected to SRP.
Here I can see a voltage drop of about 180mV. This means a current of about 18mA (180mV / 10 Ohm = 18mA) is flowing into SRP.
Is this behavior correct? Why does the current flows into SRP and not into SRN?
Thanks a lot.
Regards, Klaus
