Hi Robert,
You may have a look at LM3402 and LM3405/A. You can use Webench to design the schematic and there is also PCB layout guide in their data sheet. Hope you find the well.
Best regards,
Victor
Other Parts Discussed in Thread: LM3409 , LM3405 Hi guys, I am working on a project, using the LM3409 buck converter. The constraints are: Vin 12 - 40V, Vout: 9V, Iout: 1-5A, frequency: approx. 500kHz. Shunt: 47m Ohms Coff: 2nF, Roff: 220 - 10k Ohms. I simulated…
As alternative solution I would like to put your attention to the LED controllers TPS92510 and LM3405.
TPS92510 as well has a thermal foldback protection which allows eliminate LED temperature in case of system failure