Laser driver

Discussion in 'Analog & Mixed-Signal Design' started by Zun, Jun 16, 2018.

  1. Zun

    Thread Starter Member

    Aug 6, 2017
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    Hello, i want to drive my 10 nm green laser diod,input 4v,output ,2v 393 MA, what suggest diagram for it,thank you
     
  2. ericgibbs

    Moderator

    Jan 29, 2010
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    hi Zun,
    Do you want to pulse the laser diode or continuous,?
    I think you have a typo on the 10nm value, typically 532nm.
    E
     
  3. Zun

    Thread Starter Member

    Aug 6, 2017
    72
    0
    Yes Continue laser, typo, 10 mw,

    OSRAM 10mw PLT5 510 515nm Green Laser Diode
     
    Last edited by a moderator: Jun 17, 2018
  4. ericgibbs

    Moderator

    Jan 29, 2010
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  5. Zun

    Thread Starter Member

    Aug 6, 2017
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    Ok

    When this circuit
    I just try this circuit, input 4.5 v, just got 280 MA, when input 6.5 v ,I got 400 MA, but this, I need 4.5 v only, for my friend level laser modifications,

    https://laserpointerforums.com/atta...ll-3v-driver-info-request-driver-positive.jpg

    How this
     
    Last edited by a moderator: Jun 17, 2018
  6. Bordodynov

    Well-Known Member

    May 20, 2015
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    The operating voltage on this laser can reach 7 volts (see datasheet). The driver needs a supply voltage of 7.5 - 8 volts. The Chinese make a step-up converter (charge pump) to power the laser driver (for the finished laser modules). There is another system. This is when the current generator is fed by an infrared laser and nonlinear optics convert the IR into a green light. In this case, 3 volts is enough.
     
  7. Zun

    Thread Starter Member

    Aug 6, 2017
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    I just buy a diod only, true laser diod

    For fix to my level laser housing
     
    Last edited by a moderator: Jun 17, 2018
  8. ericgibbs

    Moderator

    Jan 29, 2010
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    hi Zun,
    The laser diode datasheet says operating current typical 60mA, 100mA max at 5.5v to 7v.
    I would modify the simple circuit in post #5 to give 60mA at 6.5v
    E
     
  9. Zun

    Thread Starter Member

    Aug 6, 2017
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  10. ian field

    AAC Fanatic!

    Oct 27, 2012
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    Just thought I'd mention in passing that green lasers are more dangerous to your eyes than red ones.
     
  11. bertus

    Administrator

    Apr 5, 2008
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