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The default for this register is mA which should be sufficient for most applications. This threshold should be set low enough to be below any normal application load current but high enough to prevent noise or drift from affecting the measurement. The default for this register is 50mA which should be sufficient for most applications. This threshold should be set low enough to be below any normal charge current but high enough to prevent noise or drift from affecting the measurement.
The value of Quit Current is set to a default value of 10mA and should be above the standby current of the system. Either of the following criteria must be met to enter relaxation mode: 1.
After about 30 minutes in relaxation mode, the bq attempts to take accurate OCV readings. Quit Relax Time specifies the minimum time required for AverageCurrent to remain above the QuitCurrent threshold before exiting relaxation mode.
Qmax 0 and Qmax 1 Generically called Qmax, these dynamic variables contain the respective maximum chemical capacity of the active cell profiles, and are determined by comparing states of charge before and after applying the load with the amount of charge passed.
Based on the battery cell capacity information, the initial value of chemical capacity should be entered in the Qmax n field for each default cell profile. The remaining bits are reserved.
Avg I Last Run The bq logs the current averaged from the beginning to the end of each discharge cycle.
It stores this average current from the previous discharge cycle in this register. This register should never need to be modified. It stores this average power from the previous discharge cycle in this register. It then logs this data to derive the average power.
It is not recommended to change this value.
Texas Instruments bq27500 User Manual
BQ27500 PDF DOWNLOAD