LM5155: One output is not stable in Dual output DC to DC converter isolated

Part Number: LM5155

Hi Niklas,

Hope you are doing good...!
We are under development of the board using LM5155 as per your suggestion and found a few observations as below.

We are taking two outputs Sec1 15V @ <0.7A & Sec2 -9V @ <0.5A.

Sec1 15V output is is stable with No Load and with Full load. But, Sec2 -9V output is not stable, it is increasing whenever we apply the load at Sec1 output & decreasing whenever we apply the load at Sec2 output.

In the same way Auxiliary output also varying as the Sec1 load varies. What could be the issue? Please guide me what to do?