Anyone can help identifying this LED flashilight driver board?

CuriousOne

Enlightened
Joined
Oct 14, 2012
Messages
813
Hello.
Got bunch of these from a friend.
At 4.2 volts, red light keeps flashing and there's no output. At 6V green led comes on and there's an output (classic 5 mode). At 8.4V board emits smoke and dies. Any ideas what this could be and what are the specs?
board1.jpg


board2.jpg
 

Dave_H

Flashlight Enthusiast
Joined
Nov 3, 2009
Messages
1,371
Location
Ottawa Ont. Canada
Interesting, sorry I can't help identifying it but like opening up things to look at them and try to figure them out.

Is the 14-pin SOIC on the top marked? Can't see any but might be the angle. Often, markings are removed to (try to) protect design from copying. Beside it is a 2048-bit serial EEPROM which is probably used to store settings.

Also not sure about the two 8-pin chips on bottom, appear to have glue or something on top.

Dave
 

CuriousOne

Enlightened
Joined
Oct 14, 2012
Messages
813
SOIC is not marked. This is some generic chinese MCU.
8 pin chips are deliberately scratched, to avoid reading of the model. One of them as I believe, is mosfet driver.
 
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