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A transformer couples two or more AC signals through a magnetic field. Often used as galvanic isolation and to transform one AC voltage to another.

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SMPS transformer auxiliary winding voltage

I am trying to design a 5 V, 1 A switch-mode power supply and have ran into a problem regarding the output voltage of the auxiliary winding of the transformer. … The transformer I am using is a 7508110151 which supposedly can output 5 V, 1 A. The issue is that to get 5 V, 1 A the primary voltage would need to be ~70 V, but I am planning on using 170 V. …
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