Every chip have some markings on top. You can search then in internet and catalogues knowing the chip function and package type.
@IlusysSystems
2 жыл бұрын
Yeah, this one had dot :) I would be much better off probing with scope where switching happens is and power rails are and sampling random sot 23-6 packages. They usually have same layout in like 2-3 variations. Unless this one is proprietary... But main problem is, that I don't have scope right now.
@3Dmaker_DIY
2 жыл бұрын
hi, I have the same problem. could you tell me which used dc to dc converter on the board?
@IlusysSystems
2 жыл бұрын
Unfortunately I wasn't able to find out so far. I can look for replacement if you give me a day. but can't test really. I will have to order new runcam so can experiment on more broken one but that will take ages probably
@IlusysSystems
2 жыл бұрын
So far I've got: buck converter I would guess, it's adjustable pin 1 VCC? ( there is 8V when powered from USB...) pin 2 GND, Pin 3 sitting on 0.6V, most likely feedback pin 5 VCC Pin 4 ??? about 70K impedance to GND so could be some sense, but there is large cap as well sooooo dunno Pin 6 probably PWM This chip is very weird, also super little space to probe and don't have scope to make sense of what it really does... Maybe it's buck with active rectification and it needs bootstrap on pin 1 Otherwise I have no idea how to classify this even before starting to search in catalogs.
@3Dmaker_DIY
2 жыл бұрын
@@IlusysSystems thank for the information, but could you tell me the name of the back converter.
@IlusysSystems
2 жыл бұрын
@@3Dmaker_DIY Unfortunately no, I thought it would be much simpler part. Still would have to order a bunch of samples and test each of them.
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