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ISO124: Measuring DC unexpected behavior.

Part Number: ISO124

Hi team,

we are developing a DC/DC converter with switching frequencies between 100 and 200 kHz. We are measureing an output DC voltage at 650 to 800V with ISO124. This is the input scheme:

The ISO124 output is shown in the next oscilloscope capture in magenta with 700V constant DC input when the converter is switching around of 100-120 kHz.

Could you give us more information about the reason to appear the triangular wave? Could you give us any solution?

Thanks for all.

Diego