Can any one tell me how to reduce leakage flux while designing flyback converter?

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Sanjoy Roy

Nazmul,

In your design,

How many outputs do you wish to have ?

How do the current ratings compare between the input, and each of the outputs ?

-Sanjay

Zhe Zhang

Interleaving primary and secondary windings can help to reduce leakage inductance.

Deepak S Gautam

Please refer to this appnote from Unitrode:

The Effects of Leakage Inductance on Multi-Output Flyback Circuits

http://www.ti.com/lit/ml/slup081/slup081.pdf

Abdelhalim abdelnaby Zekry

Adding to has been said by the colleagues, magnetic stray fields can be reduced bu using magnetic core materials.At high operating frequencies, one uses ferrite cores.

Best wishes