Boost Switching Current Regulator Capicitor Out Help.

Discussion in 'Power Electronics' started by Gamer91, Sep 29, 2016.

  1. Gamer91

    Thread Starter New Member

    Sep 23, 2016
    10
    1
    All,

    How's everyone doing? I hope everyone is doing well.

    I need some help with the method/formula for selecting an out capacitor for my boost regulator. Any help is greatly appreciated.

    In the manual for the LT3795 everything has a description with formulas for selecting all the components, except for the output capacitor.

    I'm getting a nasty current ripple and need help to mitigate it!

    Vin = 12vdc
    Vout = 95vdc
    Iout = 350ma
    Fsw = 250kHz
    Inductor = 53uH
    Cout = 7uF

    Here's a photo of the ugly ripple, ha ha. And the schematic. If you guys need anymore information let me know! Cheers!!!

    [​IMG]

    [​IMG]
     
    Last edited: Sep 29, 2016
  2. ronv

    AAC Fanatic!

    Nov 12, 2008
    3,292
    1,255
    Can you post the .asc file?
     
  3. Sensacell

    Well-Known Member

    Jun 19, 2012
    1,132
    267
    It's an LED driver? why do you care about the moderate ripple?
     
  4. Gamer91

    Thread Starter New Member

    Sep 23, 2016
    10
    1
    Thanks for the replies.

    Here's the file. And that's this issue, ha ha. I don't have enough experience to know what's acceptable.

    But my circuit has much more current ripple than the one that comes with the sample circuit for the uC.

    How can I attach it, tried zipping to 7z and .zip, doesn't show up as an option.
     
  5. ronv

    AAC Fanatic!

    Nov 12, 2008
    3,292
    1,255
    I don't think you need to zip it. Just click on upload a file nest to post reply find the .asc file under ltspice and double click it.
     
  6. Gamer91

    Thread Starter New Member

    Sep 23, 2016
    10
    1
    For some reason it wont let me upload anything, it says all files but it only shows my folders with nothing inside, strange.
     
  7. Gamer91

    Thread Starter New Member

    Sep 23, 2016
    10
    1
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