Buck-boost convertor design fault

Discussion in 'The Projects Forum' started by AaraAbdas, Dec 20, 2012.

  1. AaraAbdas

    Thread Starter New Member

    Dec 11, 2012
    5
    0
    I am trying to make inverted buck-boost design on proteus
    Can someone tell me what error I am doing in connections ? also i havent read power electronics so I dont know much about desinging the convertor. Please give me some detail about it. Thanks in advance
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,998
    745
    Think your diode D1 and inductor a L1 are in the wrong places , swap them round,anode to ov.
    The way you have it the diode will give a negative output across C1 or is that your intention?
     
  3. AaraAbdas

    Thread Starter New Member

    Dec 11, 2012
    5
    0
    Yes it will give negative output. If i swap their position then it wont be buck-boost convertor. I m controlling the switch using PIC18F452. I designed it for input=12V and output=24V. according to this i calculated the duty cycle. PIC is generating right pulse but the circuit isnt giving the right output. I searched a lot about the designing convertor but didnt get much help :(
    Where im doing wrong???????
     
  4. krutik

    New Member

    Oct 12, 2012
    1
    0
    you can see the TI's lm 62014 boost converter, data sheet and use guide
     
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