amplify current from milli-amp to amp

Discussion in 'The Projects Forum' started by naumandar, Jan 19, 2009.

  1. naumandar

    Thread Starter New Member

    Jan 19, 2009
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    i have designed a circuit for dc to dc current and my output current is in mili's and i want 3.5 Amp at output.. i don't want to use transformer bcoz of high losses..
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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    Can you give more details about what you are doing? Is it a DC to DC converter? What voltages are involved?
     
  3. naumandar

    Thread Starter New Member

    Jan 19, 2009
    8
    0
    my making a dc to dc converter i/p is 10V to 15V and op is 19.5V(regulated) and current required is 3.5 amp
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
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    Can you post up your circuit? If your input source can supply around 5 amps, this should be possible with a boost converter.
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Post a schematic diagram of your circuit.
    Realize that even if your circuit is 80% efficient, to boost up to 19.5v at 3.5A, over 8.5A at 10v will be required.
     
  6. Skeebopstop

    Active Member

    Jan 9, 2009
    358
    3
    Darlington transistor driven into saturation could give you some pretty heavy duty current amplification. You'll have to bias it properly if you require a more exact output.
     
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