Hello,
I'm trying to replicate this board for my project. It's used to drive high power non-addressable led strips with all the benefits of the WS2811 protocol. In my case I want to be able to safely switch up to 5A (but most times way less).
As you can see in the schematic they provide, two MOSFETs are used: the IC drives a RJU003N03 which then drives a beefier NTD5867NLT4G to switch the high current flow for the leds.
On hand I have a bunch of IRF3708, which after tinkering with the datasheets, I've come think could be driven directly from the IC, but I'm not sure at all. Do you think it's a feasible equivalent?
Otherwise what alternatives do I have? The NTD5867NLT4G is quite outdated, and the RJU003N03 is not available on Aliexpress which is where I usually head to for cheap small batches of electronics. Also since I will be soldering the components by hand, TO packages are preferred.
"High Power" LEDs normally use a constant current source (or "controlled current" for dimming) so you might need a "different concept"... And if you don't already know this, "raw" high-power LEDs need a heatsink.
But if you are using high-power resistors for current limiting then a regular MOSFET driver should work. A regular MOSFET driver also works with LED strips since each LED has it's own resistor.
But just taking a quick-look, the IRF3708 looks OK as a replacement.
If you don't need to address multiple strips you can use basic MOSFET drivers (one for each strip or each color) and PWM for dimming. That makes your hardware and software simpler. (You can leave out the diode since you have a non-inductive load.)
Yes that's a feasible way to do it, I used in the past for smaller projects. In my case tho because the installation already contains a lot of WS2812B strips I wanted to use the WS2811 protocol for everything. With the added bonus that I will be able to address individually the 5054 strips by chaining these modules at the end of the many already present WS2812B strips' data lines. I won't go into all the details, but for my current setup using these modules is the best way to wire them up.
So going back to the original question, can somebody help with component choice for this module?
