I am working the balancing process on our project with the BQ76952. I have some doubt regard consumption.
First, my architecture is BQ76952 (using I2C) on a 8S4P LIion battery. No Reg0 used. Powersupply is with external DCDC managed by the host processor. Host is also powered by the DCDC; REG1 and REG2 are not used for external thinks.
When I switch off the DCDC (REGIN became off), I can measure the battery current consumption at arround 280uA in nominal mode.
In case of the balancing mode is active, when I switch off the DCDC, the consumtion is arround 1,5mA (why?)
At the end of the balancing process (saw because no heating detected on Vcell serie resistors), the current still at 1,5mA.
Do you have any reason why the consumption during balancing is x5 the nominal consumption and why this consumtion stay high after balancing process.
The plan is to enter in shutdown mode if no balancing procees active and when I switch off the system but if balancing is active, I keep the BQ working because is a very long process.
However, the consumtion is 1500x higher than shutdown and I don't want that the system keep discharging the battery if the system is off during some month.
Any information is welcome