I"m trying to run high power leds, and control their brightness through three pins off an esp32. I'm not an electrical engineer or a coder. Have no idea what i'm doing, just using my research and common sense to put this together. Thanks for any help.
After reading one of the comments, I made some changes to the schematic. This is just my way of visualizing what i want to get done.
Ultimately, I want all the drivers and the controls on one PCB and i'm trying to keep it small.
I doubt that the NLDD-1400 will be happy with driving two or three 1.4A LEDs from a 48volt supply. Efficiency goes down with supply/LED voltage difference. Your driver will likely become very hot with only two LEDs in series.
Leo..
Can't read any of the small text in your schematic.
Make the text bigger and export to a pdf.
Looks like you are still trying to get lower voltages by using resistors.
This makes no sense, your longest string of LEDs is about 18V
Your comments around the circuit make no sense, especially the one about 'voltage draw'. Voltage is the difference in potential between 2 points, current is drawn.
I suspect you need to understand Kirchoff's circuit laws.
In my head, I'm using constant current drivers where the current stays the same and they get brighter by adding voltage. I assumed I needed enough voltage to supply all three strings of LED's at their brightest which would be 48v's. plus add in voltage from the MCU and the Display.
No. Voltage (and current) to the LEDs stays constant, and about 3.3volt (1Amp) per LED. PWM turns the LEDs fully ON/OFF at a high rate, and the PWM ratio changes perceived brightness.
Can't you use more LEDs and drivers with a lower current.
That would improve efficiency and heat dissipation, while the light output stays the same.
You should be using strings of 12 LEDs with an 48volt supply.
Leo..
You get what you pay for. Mouser doesn't sell fakes or knockoffs. They are an authorized parts distributor for thousands od manufacturers. The Forum is full of people with problems with junk from Amazon, alibaba, aliexpress and the like.
In principle, it looks like you are attempting to drive 3 groups of high power Leds using an ESP32-C6 (XIAO) and some ancilliary components. At least from the mixture of voltages you have indicated you are doing this in a very unconventional way.
Why not start by showing a link to the data sheet for the leds and say what the application is so the readers here can understand why you have chosen to group 6 and 3 and 2 leds. If you do that, you will almost certainly start a discussion about how best to structure the circuit and dimension the power supply (-ies) to achieve your goal in a way which is more likely to end in a successful result.
Each string of LEDs needs enough voltage for that particular string. As the strings are not in series with each other the voltage for one does not add to the voltage for another. For voltage to add things have to be in series with each other. Kirchoff's voltage law makes this clear. In my opinion if you understand Ohm's and Kirchoff's laws then you will find that much of electronics makes sense.
Here's one right here. Digikey for me