Categories

App Note: Designing a simple isolated flyback DC to DC converter

Posted on Sunday, January 27th, 2013 in app notes by DP

Here’s’ a video tutorial from Linear Technology describing how to design a simple flyback DC/DC converter. The video promotes the use of LT’s LT3573 IC, but it also provides information that could be applied to other designs as well.

Isolated power supplies are needed in a wide variety of applications. Galvanic isolation is achieved by isolating two or more circuits using a transformer or optocoupler, and is desirable for many reasons: safety, noise immunity, circuit protection, etc. Traditionally, isolated power supplies use an optocoupler to transfer regulation information across the isolation barrier.

This entry was posted on Sunday, January 27th, 2013 at 1:00 pm and is filed under app notes. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

5 Responses to “App Note: Designing a simple isolated flyback DC to DC converter”

  1. Rubu says:

    Think you forgot to add the link, here it is for anyone looking. Lovin all the DC/DC stuff, btw.

  2. Romek says:

    thank you

  3. Filip says:

    Sorry about that, we’ve been having issues with WordPress…

  4. Alan says:

    When it comes to push/pull, I like the LT3439: http://www.linear.com/product/LT3439
    Runs at up to 250KHz, so you can use smaller toroids.
    I’m using one to design an isolated +/- 5V car supply, suitable for an iPod and a CMoy amp running in a car. See notes on conflicting virtual grounds at: http://www.jdslabs.com/faq.php

    Still figuring out smallest toroid, least windings & appropriate wire guage.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • KH: He had qualms about electrolytic cap leakage impacting sleep current. I think such leakage is very low and hard to measure using hobby equipment, so...
  • Mike: Love these! great source for makers!
  • KH: Is my eyes playing tricks on me or did he just use gobs and gobs of solder on the top side?
  • Doug: When do we find out the winner??
  • KH: Oh wowsers, you're right, now that I've looked at his page, horrors, another scary copper pour. That thing also needs a box... I hope nobody...