Controllable Precision Current driver +15v/ 2.0 Amp?

Discussion in 'General Electronics Chat' started by tony lee, Jul 25, 2006.

  1. tony lee

    Thread Starter New Member

    Jul 24, 2006
    4
    0
    is there anyway to achieve a linear output current up to 2.0 amp without changing the voltage of the power supply?
    greatly appreciate and Welcome to suggestions . Thanks.

    Darlinton pair configure does help some but not good enough..( not stable)

    a simplifier circuit & simulation output.. see attach.doc
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    I = E/R suggests that you control current with resistance or with voltage. Assuming your load is not too variable, a transistor pass element should be able to do the current control. Remember that the current will cause a voltage drop in the load, so the source voltage has to be large enough that it can still push two amps through the load. A 100 ohm load will have 200 volts across it while passing 2 amps.
     
  3. tony lee

    Thread Starter New Member

    Jul 24, 2006
    4
    0
    agree 100%

    my system fixed on a +15v & -15v power supply can't change system v supply
    R-load ( 10 ohm) fixed .
    what else can i do to get 2.0 Amp?
     
  4. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
    How many amps can the supply provide now?

     
  5. tony lee

    Thread Starter New Member

    Jul 24, 2006
    4
    0
    System Specification of ±15.0v can supply up to ± 25.0 Amp.
     
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