HELP... Trying to Identify this IC Chip. LCBNN481827  - Page 1
Forum section: electronics / general

author: iRepairElectronics
author_rank: Contributor
timestamp: December 22, 2020, 05:09:40 pm
content: Can anyone help me identify this IC? number on chip is LCBNN481827Here's a pic if tit helps.

author: axemaster
author_rank: Contributor
timestamp: December 22, 2020, 05:13:28 pm
content: A wider-angle shot around the IC would help us understand what kind of circuitry is surrounding it.

author: bdunham7
author_rank: Super Contributor
timestamp: December 22, 2020, 05:20:20 pm
content: What is it in and do you have any idea of its function? I don't recognize it, but from the way it is connected, it may be an inductor or sensor of some kind, not a typical IC.

author: iRepairElectronics
author_rank: Contributor
timestamp: December 22, 2020, 05:27:21 pm
content: here is another angle.its purpose is unknown to me as well. i have one that is smoked in another unit.the unit its from is an item attached to a film camera. its prosperity and it would be useless to really attempt to go into to here.it from the mid 90's and there is no schematic.i know this will be a tough nut to crack. but looking at how so many pins are tied togetherim thinking mosfet? some kind of switch ?

author: Nusa
author_rank: Super Contributor
timestamp: December 22, 2020, 05:33:30 pm
content: My first glance guess would be a mosfet, or similar. Figuring out where those triple-traces end up may answer what it is for.

author: iRepairElectronics
author_rank: Contributor
timestamp: December 22, 2020, 05:38:28 pm
content: in the second photo those 3 tied together end up right in between the 2 resistors just below it.

author: Nusa
author_rank: Super Contributor
timestamp: December 22, 2020, 06:54:24 pm
content: Quote from: iRepairElectronics on December 22, 2020, 05:38:28 pmIf the trace ended at the via, there wouldn't be much point, would there?

author: iRepairElectronics
author_rank: Contributor
timestamp: December 22, 2020, 07:26:19 pm
content: in other words that Via isConnectedin between the two resistors.

author: amyk
author_rank: Super Contributor
timestamp: December 22, 2020, 10:08:50 pm
content: LT3080Seller image for confirmation:https://www.aliexpress.com/item/4000056510652.html(attached below as well.)

author: tooki
author_rank: Super Contributor
timestamp: December 22, 2020, 10:22:29 pm
content: Searching for "lcbn smd" quickly told me it's an LT3080.Ah, while typing, I see amyk came to the same conclusion.Quote from: iRepairElectronics on December 22, 2020, 05:27:21 pmIt's NEVER "useless" to provide information to the people from whom you are asking for help. And you should darned well make an effort to write clearly and without errors.Quote from: iRepairElectronics on December 22, 2020, 05:27:21 pmIt took me, like, 3 minutes. So no, notthattough to crack. Practice googling for partial part numbers/markings, and with the right additional keywords (like "smd") to put Google on the right track.Quote from: iRepairElectronics on December 22, 2020, 05:38:28 pmHow do you repair electronics if you don't even understand what a via does?

author: iRepairElectronics
author_rank: Contributor
timestamp: December 23, 2020, 01:17:36 am
content: Quote from: tooki on December 22, 2020, 10:22:29 pmWhere you getting the idea i don't know what a via is?

author: iRepairElectronics
author_rank: Contributor
timestamp: December 23, 2020, 01:22:10 am
content: Quote from: amyk on December 22, 2020, 10:08:50 pmthank you AMYK