Quiescent Current of Addressable LED WS2812 Measurement
Intro
Since Chinese datasheet of addressable LED WS2812 doesn't clearly specify such important parameter like quiescent current (idle current, static power), let's measure it 😎.
| Iq — quiescent current: even when light is off the chip (LED IC) need supply current. |
Nevertheless another clone XL-5050RGBC-WS2812B-S has specified static power consumption value (0.6mA):
🌟 Related Article
 | Powering addressable LED WS2812 5V when system has only 3.3V |
🔬 Test
In this experiment I used original WS2812B-B/Tin 5050 package from Worldsemi.
Voltage measured almost at LED power pins. DIN — Not Connected (floating).
As a result, at VCC=5.035V voltage the static current is Iq=577.3uA (without any light).
Result Table
Additional measurements was done at different supply voltage values:
| Power Voltage, V | Quiescent Current, uA |
| 1.059 | 22.4 |
| 1.813 | 162.9 |
| 2.505 | 307.5 |
| 3.057 | 379.0 |
| 3.335 | 405.2 |
| 3.753 | 445.2 |
| 4.197 | 489.1 |
| 4.554 | 525.5 |
| 5.035 | 577.3 |
| 5.202 | 596.0 |
Plot
Dependency VCC(Iq) for WS2812 is almost linear:
Conclusions
- Measured quiescent current at VCC=5V is Iq=577.3 uA, which corresponds to the value from datasheet Istatic=600 uA (0.6mA)
- Tip: never connect addressable LED directly do the battery (without switch) to prevent significant power consumption during sleep mode