Flyback transformer question

antknee

New Member
I'm currently choosing some flyback transformers to test. The coilcraft website is pretty good for that and they have a datasheet containing all of the ones they have available.

Some of them are rated at for example 12V input and -48V output. Does this mean the input and output are 180 degrees out of phase?

Thanks.
 

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No. The DC output can be either polarity depending upon the orientation of the rectifier diodes. The reason for the negative is that some standard telecom supplies are -48V.
 
Ah I see, thanks for the comment. I ended up buying 10 different transformers, they are surprisingly complicated and I'm expecting a lot of them to be not much use.
 
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