IR LED for night vision LED driver necessary

driverinfraredled

I am working on a project that requires a night vision camera. I have a small camera placed on the PCB and 4 IR LEDs placed around it to illuminate the dark room. The rooms are about 20-30qm.

I have selected the OSRAM SFH 4250 IR SMD LED. It has forward voltage of 1.5V, 100mA forward current.

I have two questions:

  • Are there any security issues with this kind of IR radiance? I want to use the system in my home with 2 small children. Is this kind of IR radiance dangerous to the eyes?

  • Do I need to use a LED driver? Or is it enough to run with a MOSFET (N-Channel) is shown in the schematic below.

If I need a LED-driver. What is a good choice. There are so many devices to choose from and I actually find it difficult to find an appropriate one.

Thanks for your help.
Phillip

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Best Answer

IR can be dangerous. But you would need much more energy to be harmful. So this is fully OK.

You do not need a driver. The schematic proposed seams to be OK. It may not be the most power efficient solution but it's a working one.