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Inductor selection for DC to DC buck converter LM73606

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  • Calex
    commented on 's reply
    This is good news! 🙂

  • Steve.Picotest
    replied
    Calex, will do. I started the article today, looked up this part and ordered the EVAL board. As always, most is ignored in the TI datasheet and also in the XAL7070 inductor datasheet...

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  • Calex
    commented on 's reply
    In case you have any old but gold article about this, I'll be thankful to learn from it also as I'm waiting.

  • Calex
    commented on 's reply
    I'm eagerly waiting for the article, Steve!

  • Steve.Picotest
    replied
    Calex, in some case, perhaps. Having tested 100's of these evaluation boards, and am not generally a fan. They are often created by interns and I have seen many that are pretty hideous. It could be a good starting place unless it isn't. I'll try to write an article about inductor selection soon.

    The magnetics manufacturers will likely be more help, but there are still many dependencies. What are the goals? Max performance or min cost? Min size or min EMI? SRF? Shortest lead time? There are generally many competing factors. SRF (self resonant frequency) is generally an important factor and many datasheets don't even include it. Same with AC losses.

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  • Calex
    commented on 's reply
    Thank you, Robert! This has increased my design resource to be consulted now and then!

  • Calex
    commented on 's reply
    As TI used the chip for evaluation does it not promote trust at least for me who I'm not much aware of many manufacturers?

  • Steve.Picotest
    replied
    Robert, only if you trust the chip manufacturer to choose a good one

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  • robertferanec
    replied
    A good start is always have a look on the chip manufacturer development board BOM:
    https://www.ti.com/tool/LM73606EVM-5V-400K
    https://www.ti.com/lit/ug/snvu579/sn...606EVM-5V-400K

    Looks like they used XAL7070-682MEB
    https://www.coilcraft.com/en-us/prod...0/xal7070-682/



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  • Steve.Picotest
    replied
    nice to meet you too

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  • Calex
    commented on 's reply
    The book looks very practical indeed! oh! Now I got you! I saw you recently on LinkedIn as Robert posted about a certain book from Picotest. Nice to meet you, Steve!

  • Steve.Picotest
    replied
    https://www.amazon.com/Switched-Mode...2123610&sr=8-2

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  • Calex
    commented on 's reply
    What's the name of the book, Please?

  • Steve.Picotest
    replied
    Happy to help when I can. My articles on inductors are old, but the inductor model is also in my switchmode book that was re-released on Amazon

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  • Calex
    commented on 's reply
    Okay!  Very interesting! Therefore I am chatting with the Power supply Guru 😊! Looking forward to sharing more with you!
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