Flyback Transformer Leakage Inductance, Part
1
by Dennis L. Feucht
Innovatia Laboratories
Flyback converters are a common design choice for low-power (<100 W) converters. At low power it is more difficult to achieve high efficiency because otherwise negligible power losses, such as in the control circuitry, have a significant effect on efficiency. One of the main causes of power loss in flyback converters is due to the leakage inductance of the coupled inductor (transformer.) Minimization of leakage-inductance power loss is consequently of major interest in the design of flyback converters.
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