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LM22678

Other Parts Discussed in Thread: LM22678

The datasheet of the LM22678 includes the information "Exposed Pad Connect to GND".

The heatsink of our project has to be isolated from GND. So my questions are:

Is the Exposed Pad internally connected to GND or is it isolated?

When isolated, what is the maximum voltage allowed between GND and the Exposed Pad?

Thank you very much for your support.

Uwe Loew