inductor calculation help for buck convertor

Discussion in 'The Projects Forum' started by hasanferoz, Mar 14, 2011.

  1. hasanferoz

    Thread Starter New Member

    Mar 8, 2011
    25
    0
    hey guys i am going to design a battery charger using buck topology my input voltages are 385 volts dc and output would be 108-145 volts DC since ineed to charge a battery back of 10 batteries with atleast output current of 9AMPS will this topology work if not then should i go for isolated topology and i need help on the selection of inductor value vin-vout=L di/dt there is question mark on what value of vout should be kept and how to select dt
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,346
    Hello,

    Where does the 385 Volts DC come from?
    Is it from the mains?
    If so, use a transformer to lower the voltage.
    Power supplies directly feeded from the mains CAN NOT be made safe.

    Bertus
     
  3. hasanferoz

    Thread Starter New Member

    Mar 8, 2011
    25
    0
    well it is cuming from PFC CORRECTED IC AND IT WILL GIVE ME 385 VOLTS DC NOT AC so how can i step it down
     
  4. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,957
    1,097
  5. hasanferoz

    Thread Starter New Member

    Mar 8, 2011
    25
    0
    why cant i go for buck please tell me is there any limitation in the input voltage of a buck convertor
     
Loading...