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Thread: Setting current on driver from voltage. Transfer function. Check me?

  1. #1
    Join Date
    Jan 2015
    Posts
    6

    Default Setting current on driver from voltage. Transfer function. Check me?

    Hey guys.


    This should actually be an easy one.


    Im playing with a PLD 5000 laser driver. Adding a diode to my cnc machine. It has a current monitor pin, as in you can read the outputgoing


    Anyways, it says, in order to set the current from a voltage reading, use the transfer function:


    V=I(LD) /2A/V




    My driving voltage is 12V. I'd l ike to hit around 1.5A

    Am i correct in guessing that 2(1.5)/12 = 0.25=V?



    Ie that if i read V=0.25 on my monitor pins, Im at 1.5Amps on the output?

    Thanks in advance!

  2. #2
    Join Date
    Jan 2006
    Location
    Switzerland
    Posts
    129

    Default

    This means

    Diode current = 2 Amps per Volt measured at monitor output.

    So if you read U =0.25V, then this means 0.5A through the diode.

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