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AN-4140

Part Number	AN-4140
Manufacturer	Fairchild Semiconductor
Description	Transformer Design Consideration
Published	May 19, 2014
Detailed Description	www.fairchildsemi.com AN-4140 Transformer Design Consideration for Offline Flyback Converters Using Fairchild Power Swi...
Datasheet	AN-4140 PDF File

Overview

www.
fairchildsemi.
com AN-4140 Transformer Design Consideration for Offline Flyback Converters Using Fairchild Power Switch (FPS ™) 1.
Introduction For flyback coverters, the transformer is the most important factor that determines the performance such as the efficiency, output regulation and EMI.
Contrary to the normal transformer, the flyback transformer is inherently an inductor that provides energy storage, coupling and isolation for the flyback converter.
In the general transformer, the current flows in both the primary and secondary winding at the same time.
However, in the flyback transformer, the current flows only in the primary winding while the energy in the core is charged and in the secondary winding while the energy in the core is discharged.
Usually gap is introduced between the core to increase the energy storage capacity.
This paper presents practical design considerations of transformers for off-line flyback converters employing Fairchild Power Switch (FPS).
In order ...

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AN-4140 Transformer Design Consideration - Fairchild Semiconductor

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