BQ76940 EVM has 499k // 470pF on ALERT pin.
I though bq78350 would drive a 0 and that a PD was useless.
I am wrong since our design needs something even stronger than 499k ( somewhere under 150k) to work properly.
We have added a few components on the line as shown on the picture attached. From my point of view, these should not have any significant impact on the pull-down value unless more than 5uA leaks out from that buffer (uC drives low). This is quite unlikely if I refer to the buffer's datasheet. So the bq78350 must have some significant leakage.
I can't find out any leakage current in the bq78350 datasheet to be able to size properly that pull-down resistor against the input characteristics found in bq769x0 datasheet.
High value resistor is the best for energy savings but I need some numbers to size it properly for our operating range.
Can you help on this?
Regards,
