LM3478: LM3478 dual output (positive/negative) flyback circuit

Jorge Arija

Part Number: LM3478

Hi,

The circuit on the attached file is designed to deliver a symetric voltage (from +/-80 to +/-200V).

The first prototype I assembled deliver the expected voltage on positive rail but not on negative one (the voltage is a bit more than a half).

Any idea/suggestion will be greatly appreciated!

Regards,

0 Garrett Roecker over 5 years ago

Hi Jorge,

Thanks for reaching out with your question and for using the LM3478.

To create the negative supply another secondary winding is needed.

Please let me know if you have any questions.

Thanks,

Garrett

0 Youhao Xi over 5 years ago in reply to Garrett Roecker

Can we assume the issue is resolved? Lets close the thread here, and you are welcome to reopen it by adding a new post.

Thanks,

Youhao Xi, Applications Engineering

0 Jorge Arija over 5 years ago in reply to Garrett Roecker

Hi Garret!

Thanks for your response.

I've managed to get both rails working using this new rectifier circuit using the same trafo.

Now the problem is solved! Thanks for your kind support!

Regards,

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