flexmod P3.3 catastrophic failure

[NobleGas]

H1W is probably a Ricoh LDO regulator, 3.0V, RP130N301B; L2M isn't showing up and 04M5 I can only identify in a 5 pin SOT-25 package

[Draco]

thanks for looking that up!
the driver from Russia arrived today and the way he does his interlock threw me off a bit and cost the life of an led that was connected, I need to find a Latin version for "one who kills innocent diodes, led and laser alike" lol
I do believe that the 3 volt regulator is up and running but now that i know where that 3 volts is coming from is very helpful

[catalanjo]

Jouleus Squeezer !
Cheers

[kecked]

As an idea for higher current, since most like how the p3.3 modulates why not use it as a gain stage to drive a second stage transistor/fet with a higher rating like a ham radio does with a linear. That simplifies the design I think and you can then run the p3.3 at a moderate to low service level eliminating the voltage drop to the laser beyond a diode drop, allows for external current limiting, monitoring, optical feedback if you want..... You can even set it up like a distribution amp for each separate diode in an array.

[Draco]

right now the single reason i will never buy another p3.3 is the total lack of communication from them, i understand drivers do sometimes fail but when you get no response from the company or DrLava i lose all intrest in ever dealing with him again and i am not the only person on this forum to be fucked over in the same fasion.

[planters]

I have been so pissed off by that co. and DrLava in the past for this very same reason that I will not deal with them again. The Flexmods that I have continue to work, but when they stop there are alternatives now available that I will retrofit. Who knows, they may work forever.

[Draco]

I forgot to ansure Kecked's replay, yeah you can add more fets in parallel for higher output current and with out the emitter resistors that a transistor needs, i think just small value resistors on the gates will do the job, you just want to make sure that all of the fet's share the load and not have one turn on a litter sooner then the others, that would cause that fet to take more current then the others and possibly fail, if i am wrong some one please correct me.
I have done that with transistors as well and it worked out quite well

[kecked]

I forgot to ansure Kecked's replay, yeah you can add more fets in parallel for higher output current and with out the emitter resistors that a transistor needs, i think just small value resistors on the gates will do the job, you just want to make sure that all of the fet's share the load and not have one turn on a litter sooner then the others, that would cause that fet to take more current then the others and possibly fail, if i am wrong some one please correct me.
I have done that with transistors as well and it worked out quite well

I do not have time but ok forget p3 as the preamp stage but try the idea. It might make for a simple booster to get more current easy. Heck that is how every audio amp and rf amp works so why not the same here as a current amplifier. Current being the active word while holding the voltage down. Can't use 50 v to drive a 8v diode effectively.

[mixedgas]

I had two out of three new Flexmods die within two hours of installation recently, at only 250 mA and low frequency on/off service. In a very careful install off a clean, high quality power supply, I'm done with them...

Steve

[Draco]

I have had a few conversations with the Russian vendor, he is fairly quick to respond and his drivers are 10 bucks cheaper and my first evaluation driver from him works quite well and has beam suppression so when i only need one diver he seems to be the goto guy if your willing to wait for the transit time, as i said before his interlock is different, if left open it has a pull up so you get a logic high for the interlock, grounding that input puts it into stand buy and the led gives you that status, plus the thermal shut down at 45-50c is a nice feature and he includes the pins and sockets to make your own cables, i am running it with a 50mw 520nm greenie and so far works very well and will do either TTL or Analog. the only down side is the part numbers on the ic's are sanded off but that i can understand with all the copy cats that show up, i even have found knock offs of his driver and i bet every one can guess where the knock offs are coming from lol