help gate drive circuit for buk

Discussion in 'The Projects Forum' started by muhammetztrk, May 16, 2008.

  1. muhammetztrk

    Thread Starter New Member

    May 16, 2008
    4
    0
    I need a hel for my project.I will do buck (step down ) circuit but I cant find pwm controlller circuit.
     
  2. Digi Dave

    Member

    Apr 25, 2008
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  3. Caveman

    Active Member

    Apr 15, 2008
    471
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    Typically, people these days use a switching power supply controller IC. The manufacturers' websites provide lots of application notes, simulators, and wizards to help design with them. Some manufacturers are Texas Instruments, Linear Technology, and National Semiconductor.
     
  4. muhammetztrk

    Thread Starter New Member

    May 16, 2008
    4
    0
    thanks man. but I want full circuit design dc dc converter(12 to 5) and its gate drive circuit

    can u help
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Take a look at the link that Digi Dave posted.
    There are five pages of links to various designs for many applications.
    Besides, you didn't specify how much current you need.
     
  6. muhammetztrk

    Thread Starter New Member

    May 16, 2008
    4
    0
    12v to 5 volt
    Io=0.5 A - 2 A
    I cant find pwm and gate drive circuit
     
  7. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
  8. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    You've got an N-channel MOSFET as a high-side switch. Try a P-channel MOSFET instead, or try another driver.
     
  9. muhammetztrk

    Thread Starter New Member

    May 16, 2008
    4
    0
    mistake is only that ? mosfet type?

    I m not sure tl494 pin connections and ır2117s pin connections
    do you know about that
     
    Last edited: May 19, 2008
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