Original question:
Hi Team,
We are attempting to measure the voltage of a PACK+ using PMON and PACKDIV. Therefore, there are two questions we would like to know:
1. If the relevant functional modules of BQ76200 are damaged due to the high turn-on frequency or high duty cycle of PMON, what would be the mode of its damage?
2. If we want to experimentally determine the suitable turn-on frequency and duty cycle for PMON, which characteristics should we observe to make a judgment?
Hello Kyan,
1. If the relevant functional modules of BQ76200 are damaged due to the high turn-on frequency or high duty cycle of PMON, what would be the mode of its damage?
It has not been characterized how the part would be damaged if there's a failure in the PACKDIV pin.
2. If we want to experimentally determine the suitable turn-on frequency and duty cycle for PMON, which characteristics should we observe to make a judgment?
It will take ~0.5-us for the part to switch PACKDIV to PACK when PMON_EN is high (this is listed in the datasheet). Once switched on, PACKDIV is meant to remain connected to PACK only while the measurement is taken place, so duty cycle should be low. Frequency should be able to be decently high. The recommended current through PACKDIV is 500-uA or less. This is all described in Section 2.3 PCHG and PACK Monitor of our bq76200 Beyond the Simple Application Schematic application note.
Hopefully this should give you enough information to find the proper frequency and duty cycle! 
Best Regards,
Luis Hernandez Salomon
