Driving the SBT-10X LED with maximum power requires a constant current driver that can deliver 2A. 

We build a constant current driver around the LM3409 high power led driver. 

Nothing but trouble with this version. I couldn't get it to work. The LM3409 just wouldn't drive the pgate. 

No idea what's the problem, anyone?

Dropping this idea for now. We found a much simpler and cheaper IC that hopefully does the job, AL8843.

I'm sticking close to the eval board layout, so hopefully no bad surprises this time.

PCBs arrived:

In addition to the driver boards, I ordered an LED copper base PCB. It's a simple PCB with two caps close to the LED and a connector. The copper base will help dissipate excess heat. Since JLCPCB did not have this LED in stock, I assembled it using a PCB oven.

Using a 12V power supply the LED lights up.

I directly measured the current using a TLI4971 current sensor, it averages around 2.1A.

Probing the voltage across the LED, showed a nominal voltage of 3.68V and voltage spikes up to 6.68V. These spikes are very short 10-100MHz so hopefully wont damage the LED.

Using a UV power meter, the max emission directly measured on the LED was 8.57Watt/cm^2

Next I tested for endurance. I cooled the LED using an aluminum heat sink with fan and inspected with thermal camera.

While the LED is pretty hot on the top, the copper base PCB together with the heat sink seem to cool the LED sufficiently. But the driver got very hot. Specifically the current sense resistor. And I noticed I had made a mistake and assembled a 250mW rated resistor. Should be at least 1W..
For now I just added cooling to the drive aswell. In future designs this needs to be changed. Also probably a good idea to cool the drivers in the final lamp aswell.

I kept the setup running for over 12 hours now, without any signs of failure. I think we are good :)

One last check, I wanted to see how far away the cc-driver can be placed from the LED. The cable is approx. 70cm long which gives us plenty of room for placing the drivers.