January 16, 2021

Freshwater LED, Pt1


Small design vignette for an LED driver design for freshwater LED lighting. In this example I’m using a 28 Yuji 5038 LEDs at 6500k and 98+ CRI. Since they are all in series, it offers about 100Vf, which is out of range for most of my LED drivers. However, it only needs 150mA maximum current, so becomes a tractable problem.

Fitting in a 50x80mm space small case, this LED driver + controller uses some totally over-kill CPU (ATSAME51J20) featuring CAN, USB and dimming control, with a battery for RTC backup.


© 2020 Yann Ramin