SLUSDQ4 April 2019 BQ79606A-Q1
There are two comparators integrated with each switch (CBVC and VCLOW). The comparators are enabled with the CBVC_COMP_CTRL[CELL*] bits. The first comparator tests the voltage across CBn to CBn-1 and compares it to (VCn to VCn-1)/3. If the CB voltage is greater than the VC/3 voltage, a flag (CBVC_COMP_STAT[CELL*]) is set. After the comparator is turned on, it takes up to 2.5ms to update the CBVC_COMP_STAT[CELL*] register status bits. Give 2.5ms delay time before reading the status register. The second comparator checks if the cell voltage (VCn - VCn-1) is above VVCLOW. If the cell voltage is less than VVCLOW, a flag (CBVC_VCLOW_STAT[CELL*]) is set. If the cell voltage is low, the result from CBVC_COM_STAT must not be trusted. Charge the cells further before retrying the test.