SLUSDQ4 April 2019 BQ79606A-Q1
While the BQ79606A-Q1 does contain an internal, anti-aliasing RC filter for the cell inputs, many applications experience transient spikes above the absolute maximum rating of the BQ79606A-Q1. For these applications, an additional ESD or a differential RC filter can be connected to reduce voltage spikes that may exceed the absolute maximum voltage ratings. Figure 43 provides a reference for the VC* input filter. The voltage from VCn to VCn-1 is limited by the cell voltage, see the pin functions table for more details on voltage rating and values. The resistor values are selected based on the values selected for the CB* (cell balancing) inputs. The values for the VC and CB resistors must be at least 4 times the value of each other in order for the best hot plug performance. Larger values for VC can be always be used, however, the larger the value, the more effect it has on the measurement accuracy. The recommended procedure after the CB resistor is selected, is to select the VC resistor value to be 4 times (recommended to improve SNR and hot pug performance) the value for CB resistor values. See Selecting Cell Balance Resistors for details on the selecting the cell balance resistor value.
The recommended filter capacitor on VC0 to VC6 listed in Figure 43 (they are different from pin to the other). It is recommended in these combinations for better transient response. If transient response is not a concern, the capacitor valued from 0.47uF to 1uF can be used on all VC pins.