Other Parts Discussed in Thread: INA302,
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
I can look at this on one device but the issue will also be timing and recovering from a saturation condition which will happen. I will get lab access today or tomorrow. Can you tell me what the expected slew rate will be. If you do not know I will end up just using the limitation of the generator I can get for 0 to 29V.
So having the input at 29V will not be an issue but when the mosfet is not active the INA300 will display and alert function. Below is the condition where the input goes from 0V to 29V. Keep in mind the low side is not accurate and can trip easily. I did use and EVM. Ch 2 is the input and Ch 3 is the Alert pin. Because of the transition being so large if there are any capacitive coupling elements in the layout you could feedback some noise to the differential inputs and cause the input to see noise causing chatter on the output. I would not recommend using Latch mode for this due to that. Also if you are attempting to get an alert for overcurrent you would not be able to do this as you would not distinguish from the FET being off to over current conditions. We do have a two comparator model in the INA302 if you require that function.
Thank you Javier,
That answers my question. It will function in our system.
The alert function will be feed back into another device to modulate its behaviour in different conditions, having the MOSFET off and the ALERT active is expected. The delay looks like it is only 100us or so, which in our application is negligible. As for chattering an RC time constant will prevent any erratic behaviour.