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Vision machine lighting; constant current regulator or led driver?

rumm8
Prodigy 10 points

Other Parts Discussed in Thread: TPS61500

Hello,

First, my apologies if I'm not writing in the right forum but I'm a bit lost with this issue.

I'm trying to design a lamp for a vision machine application. It consists on 9 ultra bright leds. The connection of these leds will be in serial so I need a constant current through them.

Each led consumes 20 mA and 3.3V and the total power I need will be around 0.6W. Furthermore I also want to strobe them with peaks of 100 mA, I'm thinking in a strobe mode not only continuous.

At this point I dont know if a constant current regulator could fit in this application or there is a led driver with a built-in function that helps me to implements the strobe mode. Any suggestions... guidelines... ??

Thanks in advance.

  • 0
    TI__Guru**** 152110 points

    Yes, this is the right forum for your request.

    The LED driver you use would depend on your input voltage.  If you want to create a strobe you can see, then you will need to design your LED driver to handle that amount of power (100mA) in steady state.  You would just do PWM dimming at a very low frequency to create the strobe effect.

    The power quick search at power.ti.com can help you find devices that meet your power needs.  The TPS61500 should be able to do what you want.

  • 0 in reply to Chris Glaser
    Prodigy 10 points

    Hi everyone, Im so interested in this topic, and I hope you can help me. Im trying to desig a vision system light but Im little confuse about the standards in vision system lights like the  optimal frequency for the leds and how can I control that?

    Thanks in advance!

  • 0 in reply to Adrian Barreno
    TI__Prodigy 520 points

    Hi all,

    I think it will be better if we have a specific example to discuss with.

     

    Best Regards

    Ming