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Author Topic: Automotive EMI filter for power rails  (Read 4113 times)
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Sideshow Bob
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« on: May 11, 2023, 02:11:54 14:11 »

Do any have any design resources(white paper, appnote, etc) for recommended automotive EMI power rail input filtering? Can not find much about it. I was thinking something in the way of Phi filter maybe in combination with a common mode choke. It will be a quite low power unit. Not something like a power amp
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Manuel
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« Reply #1 on: May 12, 2023, 05:35:07 17:35 »

Just for corollary info:

www analog com/en/analog-dialogue/articles/ speed-up-the-design-of-emi-filters-for-switch-mode-power-supplies. html

take care,

X!
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« Reply #2 on: May 14, 2023, 08:25:42 08:25 »

Hi

Search TI reference design archive - the have many design for automobile with filter and protection circuit = you will probably find there what you are looking for

All the best

Bobi   
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« Reply #3 on: May 15, 2023, 11:48:19 11:48 »

check out wurth elektronik also look a book from wurth Trilogy of Magnetics

https://www.youtube.com/watch?v=EpFOGG49QvU

https://www.youtube.com/watch?v=laq5TOm7R3w

https://www.youtube.com/watch?v=Eexk3ly4bCo

https://www.youtube.com/watch?v=johYQItOrtM

sadman

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Sideshow Bob
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« Reply #4 on: May 15, 2023, 04:18:55 16:18 »

Thank you for all the help people. I think I have come step further. And will probably waste a lot time on Youtube the common days. I found a reference design here. https://www.ti.com/tool/PMP9397
I think I will use something like that. Since I do not need so much current, I will probably bump the inductor values up with  inductors  from the same family
« Last Edit: May 15, 2023, 05:10:29 17:10 by Sideshow Bob » Logged

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Signal
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« Reply #5 on: July 18, 2023, 02:16:13 14:16 »

If your device requires not 12 but 5V and consumes 50-200 mA then automotive linear regulator without any "chokes" is enough. LM2931 LM2936 LM9036 MIC2954. I am late, but maybe it will be useful
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« Reply #6 on: February 12, 2024, 07:30:34 19:30 »

If itís not for professional use , but you only want one piece to do your work,(like my case)I would suggest to buy from Ali a filter (including common mode chokes) for this purpose.you can find up to 20 amps capacity in good price. Iím still waiting it so not tested yet , but looks promising
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