ZHCS477K September 2011 – August 2022 BQ294502 , BQ294504 , BQ294506 , BQ294512 , BQ294522 , BQ294524 , BQ294532 , BQ294533 , BQ294534 , BQ294582 , BQ294592
PRODUCTION DATA
8.3 Feature Description
The voltage sensing for each cell is done independently using a multiplexer. The method of overvoltage detection is comparing the voltage to an overvoltage protection voltage VOV. Once the voltage exceeds the programmed fixed value, the delay timer circuit is activated. This delay (tDELAY) is fixed for either a 4-s or 6.5-s delay. When these conditions are satisfied, the OUT terminal is transitioned to a high level. This output (OUT) is released to a low condition if all of the cell inputs (Vx) are below the OVP threshold minus the Vhys.
Figure 8-1 Timing for Overvoltage Sensing