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LLC Transformer (Resonant) Winding Question

Discussion in 'Power Electronics' started by sowlaki, Sep 6, 2019.

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  1. sowlaki


    Jan 10, 2019
    Hello, I am designing a USB PD compatible AC/DC adapter however I am questioning the schematic of a specific LLC transformer I aquired from WE*. I don't get if the two secondary windings are supposed to be senter tapped , solder them together , or if one of the windings are the 2nd side auxiliary. I tested the circuit with the circuit of a seperate smps transformer and both of the secondarys show the same voltages when connected single rectifier and el.capacitor. Which means all of the windings share the same core, something the schematic disproves.

    * Wurth Electronik sent me 2 free samples of this transformer since I am studying EE at a university (Very happy about that :))

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