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Can you show the Vgs of the MOSFETs in primary (and in the sec. If using rectifier MOSFETs)

I suspect not enough energy in the leakage inductace in the primary during the dead-time so it resonates.

As for the EMI you should look for the current loops with high di/dt.

Would like to hear what others think.

[QUOTE="Magnethicc, post: 1779571, member: 665516"] Can you show the Vgs of the MOSFETs in primary (and in the sec. If using rectifier MOSFETs) I suspect not enough energy in the leakage inductace in the primary during the dead-time so it resonates. As for the EMI you should look for the current loops with high di/dt. Would like to hear what others think. [/QUOTE]

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