I was looking at the datasheet of the HCPL-2201, and it specifies a minimum CMR value of 10kV/us at a common mode voltage of 300Volts.
When the common mode voltage is less, ie. 50volts, the CMR goes down to something around 1kV/us.
I have a fet driver circuit that requires a minimum of 10kV/us CMR for the opto, for a floating fet gate, would this opto work properly under these conditions? I am not sure how to know what the common mode voltage would be to know if I will get 1kV/us or 10kV/us CMR or something in between.