CX2812 LED driver

[VibroKing$]

CX2812 LED driver similar to CX3806
where find datasheet?
I have only schematics 🙁

An externally hosted image should be here but it was not working when we last tested it.

thanks.

 

[VibroKing$]

I found some datasheets but only in Chinese
CX-2816_°Ù¶ÈÎÄ¿â
CX-2810_°Ù¶ÈÎÄ¿â
CX-2805_°Ù¶ÈÎÄ¿â
These chips work at 5.5V max
but unfortunately they are also
used on 6V battery-powered devices
and sometimes they will burn.

image of datasheet :

 

[dangus]

Consider replacing it with an ATtiny13 if you want a light with more useful modes. Still, being able to disable the flashing mode would be an improvement, and it looked like one of the jumpers could do that.
AVR Drivers - Flashlight Wiki
How To Build a Flashlight With Perfect Modes (picture heavy) | BudgetLightForum.com

You probably found this discussion?
http://budgetlightforum.com/node/15463

RedSpawn said the actual modes were:

0,0: high – low – flash – off
+,0: high – low – off
0,+: high – off – off
++: high – off

I bought a remarkably cheap LED headlamp on eBay, thinking it would at least be good for parts, but nearly every part of it is compromised in some way. The lamp head doesn't provide proper heat-sinking, the battery cover is really loose, the controller doesn't have very useful modes, and the beam is too narrow for most purposes. Still, the battery box does hold two 18650 cells solidly, and there's plenty of room inside to add a DIY driver of some sort.

 

[VibroKing$]

I found this chip in my varta lantern.
The cx2812 heats up a lot when I press the switch (on/off) but the lights are always on.
(maybe 4 batteries x 1.5v give too much tension and it burned)
I believe that (in my case) the only solution is to replace the electronic switch with a beautiful mechanical switch 😀

 

[Laserrod]

cx2812

The chips pin 7 is momentary switched to V+ to change states. Chip stays on now with zero switch response.
I think output is off on power up, but is always on no matter what now.
dg