High constant current sink!

Discussion in 'Electronics Resources' started by Rocky2, Jul 18, 2012.

  1. Rocky2

    Thread Starter New Member

    Jul 18, 2012
    3
    0
    Right now I have a problem in finding a available power source for charge and discharge of EDLC.
    It required to be charge and discharge at a constant current of 30A, and the voltage is about 10 V or so.
    [​IMG]
    Do you think these can work or the current is far too high>
    If so, what can I do? I am not familiar with this
     
  2. Rocky2

    Thread Starter New Member

    Jul 18, 2012
    3
    0
    No one can help? I need to solve this problem today!
     
  3. strantor

    AAC Fanatic!

    Oct 3, 2010
    4,302
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    that chip only puts out 15mA max, when shorted.
     
  4. panic mode

    Senior Member

    Oct 10, 2011
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  5. crutschow

    Expert

    Mar 14, 2008
    12,977
    3,221
    Here is a constant-current circuit that boosts the current of the op amp, limited only by the size of the N-MOSFET and its heat sink. The constant current equals the voltage applied to the DAC0 Out pin divided by R1.

    If you use a single-supply type op amp, such as an LM358, you only need a positive supply voltage. You also don't need the two 5M resistors.
     
  6. aprillove1719

    New Member

    Jul 17, 2012
    13
    0
    Thank you for giving that information.... ;)
     
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