I am building an electronic board game which will have 500+ addressable LEDs in it - I don't know the exact model but they claim to be WS2812B, I bought them from Amazon here: https://www.amazon.com/XUNATA-Integrated-Controller-WS2812B-1000pcs/dp/B071SM1F7G.
When the game is running, I expect most of the LEDs to be off or low brightness, but these LEDs have a default of fully lit on power-up. So, before you send them data to turn them off, that many LEDs is going to draw 30A. I'm going to be driving them with a Teensy on the same supply and the whole thing will run off a LiPo battery.
My question is whether I should account for this in my design and how. My options are:
- Ignore it - just get a DC converter and battery that can handle the peak load and make sure the Teensy turns all the LEDs off first thing.
- Control both the power and data pins from the Teensy; I can divide the LEDs into segments which draw 2A at startup and flip them one at a time. Not sure if I should use low-side switching with NPN or high-side switching with PNP transistors
- ??? Is there a way to change the default maybe?