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LM5070 low power

user2012316
Prodigy 10 points

Hi all, I'm implementing a POE source for my project.
I used the scheme that brings the datasheet but I made some modifications.
I changed the 3.3v at 12v transformer, the transformer is coilcraft and is the model C1586-ALD
Without connecting any device, the voltage is 12v but connect a device, the voltage down at 3.2v

I have tried many combinations of resistors without result, would it be possible to configure the chip to furnish 12v source?

The pattern I use is this:
[IMG]http://i62.tinypic.com/28b5kiq.png[/IMG]
sorry my poor english

  • 0
    TI__Genius 10370 points
    Hi,

    I apologize that no one has followed up with your question. I'm going to close this thread, but if you still have a question please feel free to post a brand new thread instead of replying to this one. We will do our very best to respond within 24 hours to any new post you might have :-)

    Best Regards,
    Aramis P. Alvarez