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Answer by Dwayne Reid for Optoisolated Feedback Pin Operation

The feedback is usually analog. The opto-coupler is normally a package containing a LED driving a photo-transistor. The amount of electrical coupling between the input LED and output photo-transistor...

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Optoisolated Feedback Pin Operation

In the case of galvanically isolated AC to DC converters, a controller IC is used to regulate the output voltage of the converter. The feedback pin is fed a signal from an optoisolator driven by the...

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