thefish
Enlightened
So as some of you may know I have been working on some LED drivers... well today my first prototype boards showed up, I loaded them and they work great (just in time for a Cree XR-E test).
Specs:
EDIT:
They fit nicely into many of the cheap chinese lights that take 3 AAA batteries, since these are prototypes they have many extra features that will probably be eliminated in the future in order to make them smaller (such as a pot for infinitely variable brightness between 20% and 90%) and a Dip switch for selecting 1.5V input or 3-4V input... I have actually pushed Vin to 5.2V in testing but I have found it makes things get hot and if even a bit of a surge happens it will fry the IC.
Here is the test setup, with a beam shot Left: Ultrafire 602A (L1P Clone) Right: Test light:
Specs:
- 1 Watt
- Voltage Boost
- CC 350ma
- Efficiency: 75% @ 1.5Vin 90% @ 3Vin
- Dia = 0.78 +/-.02
- 0.9-4.5 Vin
- Voltage Cutoff = 0.9V (1.5V input), 1.8-2.2V (3-4.5V input)
EDIT:
They fit nicely into many of the cheap chinese lights that take 3 AAA batteries, since these are prototypes they have many extra features that will probably be eliminated in the future in order to make them smaller (such as a pot for infinitely variable brightness between 20% and 90%) and a Dip switch for selecting 1.5V input or 3-4V input... I have actually pushed Vin to 5.2V in testing but I have found it makes things get hot and if even a bit of a surge happens it will fry the IC.
Here is the test setup, with a beam shot Left: Ultrafire 602A (L1P Clone) Right: Test light:
Last edited: