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 V_OV. Once the voltage exceeds the programmed fixed value, the delay timer circuit is activated. This delay (t_DELAY) 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