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Title: Automotive EMI filter for power rails Post by: Sideshow Bob 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
Title: Re: Automotive EMI filter for power rails Post by: Manuel 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! Title: Re: Automotive EMI filter for power rails Post by: bobcat1 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 Title: Re: Automotive EMI filter for power rails Post by: sadman 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 Title: Re: Automotive EMI filter for power rails Post by: Sideshow Bob 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 Title: Re: Automotive EMI filter for power rails Post by: Signal 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
Title: Re: Automotive EMI filter for power rails Post by: Nuclear__ on February 12, 2024, 07:30:34 19:30 If it’s 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. I’m still waiting it so not tested yet , but looks promising
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