Imagine 50 smart-home devices on your WiFi network, pretty annoying right?
LEDs are in, LiFi is cool, IOT is hot, lets see what we can do
The TI LM3409 is a DC-DC constant-current buck driver IC. This is a step down driver that can provide a constant current source to power LED(s). The circuit I designed around it is optimized for low ripple, fast switching capability, and current up to about 6A continuous.
Design specification as built:
Schematic on KiCad:
PCB Layout on KiCad (BOM is included):
And a build video:
PSpice simulation circuit:
Recommend you use a heatsink on the bottom of the board, and on the LM3409 itself as pictured. Also recommended you use my 3D printed mount:
As pictured, I used a Cree XM-L2 (single 3.3v output), and a wall wart 6.5v 3A PSU. The LED is mounted on a CPU heatsink
That's all for now :)