Dear e2e support,
My customer needs to protect the ISO7760F inputs from high voltages (up to 90V during several seconds), in case of dysfunctions inside his system/application.
So the ISO inputs have been protected by series resistors (30 to 50Kohms).
Under these conditions the diodes at the input stage of our ISO will get a ~3mA current, right?
Do you see any issue with this architecture?
would you recommend other resistor value?
What would be the max current that our diodes could handle under the following conditions ?
- during 5s,
- at 70°C,
- only 2 diodes among the 6 are clamping the current (the others are not active)
Note that after these 5s, the ISO can be out of order or defective. This is not an issue, regarding how it's managed in the final application.
Regards,