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OPT8241-CDK-EVM: Illumination board

sang lee87
Prodigy 10 points

Part Number: OPT8241-CDK-EVM

Hi. I want to make nine connected laser diodes.

I have a two questions.

first, I have confirmed Application Report that "Illumination Driving for Time-of-Flight (ToF) Camera System" that laser diodes can connect up to six of these drivers.

in this case, Do I need to use other zener diodes and RF diodes instead of conventional Zener diodes?

If so, can you recommend them?

second, Is it possible to connect 9 laser diodes in series by simply changing the zener diodes and RF diodes?

Can you please give me an idea of how to connect 9 laser diode.

  • 0
    TI__Expert 3800 points
    Hi,

    9 laser diodes is typically challenging because the series inductance increases and prevents fast switching. You would have to be very careful of PCB layout to have minimal inductance.
    You would have to use a different zener diode to match the series voltage of the 9 laser diodes. RF diode's reverse voltage should be such that it can withstand the reverse voltage. The circuit diagram otherwise would not change.

    Hope this helps.

    Regards,
    Subhash