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High Frequency Transformer Designs for Improving Cross Regulation in Multiple-Output Flyback Converters

The cross regulation in multiple-output flyback converters is affected by leakage inductances of the transformers. The suitable winding arrangements of the transformers will lead to the improvement of cross regulation. This paper presents the comparative study of various winding arrangements in the three winding flyback transformers. The cross regulation model is considered in form of the resistance matrix related to the leakage inductance parameters. The design guidelines for the transformer for improving cross regulation are given based on the experimental results.