+ Post New Thread
Results 1 to 5 of 5
  1. #1
    Advanced Member level 2
    Points: 2,738, Level: 12

    Join Date
    Aug 2013
    Posts
    529
    Helped
    6 / 6
    Points
    2,738
    Level
    12

    Flyback converter with TL494

    Hello,I would like to design a Flyback converter with TL494 could anyone suggest the circuit and operation I have 6V which I want to make it 15VDC for supplying the control circuit of my VFD for AC 3phase motors.

    The high frequency transformer I have on which is written :EI-28ASG,01N,LIV 0454 was extracted from a computer power supply,can you please guide me on how I can get the 15VDC?

    Please help,best regards,

    •   Alt4th June 2016, 19:24

      advertising

        
       

  2. #2
    Advanced Member level 5
    Points: 13,005, Level: 27

    Join Date
    May 2015
    Location
    Melbourne, Australia
    Posts
    2,213
    Helped
    751 / 751
    Points
    13,005
    Level
    27

    Re: Flyback converter with TL494

    I recently bought some of these ultra low cost Chinese power supplies, fully expecting them to be total rubbish.
    To my great surprise they work extremely well with excellent voltage regulation and and a very wide input voltage range that would work anywhere in the world.
    They are not a buck regulator, but a proper fully mains isolated dc power supply.

    For the price, its just not worth building something myself.
    I now use these to power every small project.

    http://www.ebay.com/itm/351630268206...%3AMEBIDX%3AIT
    Cheers, Tony.



    •   Alt5th June 2016, 00:45

      advertising

        
       

  3. #3
    Advanced Member level 5
    Points: 13,357, Level: 27
    schmitt trigger's Avatar
    Join Date
    Apr 2013
    Location
    C4E4DEEEDCE6ECD2
    Posts
    2,249
    Helped
    729 / 729
    Points
    13,357
    Level
    27

    Re: Flyback converter with TL494

    Isn't it amazing? The price/performance ratio?

    I also wanted myself to do an Universal AC to 12V and 5V supply, and found this:
    http://www.ebay.com/itm/AC-DC-220V-t...cAAOSwd0BVvtPd
    My batteries are recharged by "Helpful Post" ratings.
    If you feel that I've helped you, please indicate it as a Helpful Post



    •   Alt5th June 2016, 02:58

      advertising

        
       

  4. #4
    Super Moderator
    Points: 241,738, Level: 100
    Awards:
    1st Helpful Member

    Join Date
    Jan 2008
    Location
    Bochum, Germany
    Posts
    41,971
    Helped
    12769 / 12769
    Points
    241,738
    Level
    100

    Re: Flyback converter with TL494

    The high frequency transformer I have on which is written :EI-28ASG,01N,LIV 0454 was extracted from a computer power supply,can you please guide me on how I can get the 15VDC?
    Are you trying to build a 6 to 15 V isolated DC/DC converter or an AC/DC power supply, as assumed by the previous posters?

    Regarding the recycled transformer, you need at least a schematic of the original power supply to estimate it's parameters and determine if it may be useable for your design. The type number is a manufacturer code which can be hardly decoded.



  5. #5
    Advanced Member level 5
    Points: 28,460, Level: 41
    Achievements:
    7 years registered

    Join Date
    Sep 2008
    Location
    cambridge
    Posts
    5,963
    Helped
    442 / 442
    Points
    28,460
    Level
    41

    Re: Flyback converter with TL494

    yes, from your post it sounds to me that you really need a low power boost converter...and micrel do some nice chips for that...or even a cheap ucc38c42 etc etc



--[[ ]]--