控制电池供电项目中许多 WS2812 LED 的电源
我正在构建一个电子棋盘游戏，其中有 500 多个可寻址 LED - 我不知道确切的型号，但他们声称是 WS2812B，我从亚马逊购买了它们：https://www.amazon.com/XUNATA-Integrated-Controller-WS2812B-1000pcs/dp/B071SM1F7G。
当游戏运行时，我预计大多数 LED 都会关闭或亮度较低，但这些 LED 的默认设置是在通电时完全点亮。因此，在向它们发送数据以将其关闭之前，许多 LED 将消耗 30A 的电流。我将用相同电源的 Teensy 来驱动它们，整个装置将使用锂聚合物电池。
我的问题是我是否应该在设计中考虑到这一点以及如何考虑。我的选择是：
- 忽略它 - 只需购买一个能够处理峰值负载的直流转换器和电池，并确保 Teensy 首先关闭所有 LED。
- 控制 Teensy 的电源和数据引脚；我可以将 LED 分成几段，启动时消耗 2A 电流，然后一次翻转一个。不确定我是否应该使用带有 NPN 的低侧开关或带有 PNP 晶体管的高侧开关
- ？？？有没有办法改变默认值？
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?
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