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How can I calculate the peak current rating of the switch in a flyback dc-dc converter?

April 26, 2017CALCULATE converter dc-dc Flyback peak rating Switch

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How can I calculate the peak current rating of the switch in a flyback dc-dc converter?

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A method of calculating flyback regulator design may be viewed in the online document “Switching Power Supply Design: Discontinuous Mode Flyback Converter”. It contains calculation details needed for designing a 3-output flyback converter, including switch peak current. This item is contained in Section (3) Primary Current. The peak current required for a particular flyback design may also be estimated using National”s Power WEBENCH online design environment, which includes calculated performance as well as online electrical simulation.