High-power LED (star)
3 W LED on a 20 mm star, cool white · Vf ≈ 3.25 V at 0.7 A (about 250 lm) · 1 A max · needs a constant-current driver and a heatsink (the flashlight body)
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: High-power LED on a 20 mm aluminium star
Pins
- + (anode pad)
- − (cathode pad)
Ratings and limits
| Rating | 0.7 A, 1 A max |
|---|---|
| Forward voltage | about 3.25 V at 0.7 A |
| Light | about 250 lm |
| Heat | must sit on metal: the flashlight head or a heatsink |
How to use it
The emitter in flashlights and torches. Drive it from a constant-current driver, never straight from a cell.
Lessons and builds that use it
- Rechargeable flashlight: 21700 cell, USB-C TP4056, clicky switch, 2.8 A driver and a 10 W LED (build)