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Thread: Llc hb smps 2000w

  1. #51
    diysmps Senior Member res_smps's Avatar
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    I have done testing using top224 based flyback smps
    for this test I did not use an oscilloscope

    - Vout 15V regulated
    - load : 3x 20ohm 10W resistor in parallel (6,6ohm)
    result :
    with 68uf elco
    the voltage on the capacitor drops from 291 to 284
    https://youtu.be/ojRMMRJBEOI

    with 20uf mkp
    the voltage on the capacitor drops from 293 to 271
    https://youtu.be/yntqr5LMJdw

    I thought this MKP capacitor was quite small which I could use for amplifiers input after this experiment, but it was very large
    68u_vs_20u.jpeg

  2. #52
    diysmps Member* MyFirstSMPS's Avatar
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    OK, if I get all parts IŽll try too.
    You can probably use them in parallel with electrolytic filter capacitors, does this change anything?

    Maybe this converter is really too advanced and this design does not work very well in amateur construction, without a complicated sircuitry
    Last edited by MyFirstSMPS; 08-02-2019 at 04:52 PM.

  3. #53
    diysmps Senior Member res_smps's Avatar
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    for me it is enough, please check attached appnote page 2 : "Typically, the DC link capacitor is selected as 2-3uF per watt of input power for universal input range (85-265Vrms) and 1uF per watt of input power for European input range (195V265Vrms)"AN-4146.pdf.pdf

  4. #54
    .... Silvio's Avatar
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    I guess they will be more suitable where there is a PFC in the front end of an SMPS.

    there is a brief explanation of the pfc not filtered much more or less with a few microfarads in the PFC stage.

    here is a video link on youtube about this

    link https://www.youtube.com/watch?v=nhhWyg8QKiI&t=1s

  5. #55
    .... Silvio's Avatar
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    Hi Res can you give me your mail address I need to talk to you privet.

  6. #56
    diysmps Senior Member res_smps's Avatar
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    restovarius at gmail dot com

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