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current source

Minglai Kao
Intellectual 635 points

What devices or small modules can I use to generate 10A current source to drive high-power lasers? Thanks

  • 0
    Prodigy 5 points

    Hello Minglai,

    There are many power devices that can make a constant current source.
    What is your:
    1. Input voltage max min
    2. Output voltage needed to drive the laser
    3. Will the current be constant or pulsed, and if pulsed what will the frequency, duty cycle, slew rate, need to be

    This will help route your query to the proper device team.

  • 0 in reply to Ed Walker
    Intellectual 635 points

    Hi Mr. Walker,

    Thanks for replying.

    Input voltage: any voltage between 6 to 25V

    output voltage: 3.3V

    Current: pulsed 0 to 10A, very low speed, manually operation up to a few hundreds Hz.

    Thanks

    Ming

  • 0 in reply to Minglai Kao
    TI__Guru**** 191445 points

    Minglai,

    Generally what you propose is not a constant current source, since your output voltage is fixed at 3.3 V.  For constant current source, the output voltage will change according to the load to keep the current constant.  In your case, you will keep the voltage constant and vary the output current as the load changes.

    For a module you can look at or

    For a controller you can consider:

    or www.ti.com/.../TPS51117