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laptop power adapter replacements

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LaserTazerPhaser:

--- Quote from: blueskull on May 19, 2019, 07:11:31 am ---
--- Quote from: LaserTazerPhaser on May 19, 2019, 07:03:07 am ---Meanwell bricks aren't potted?

--- End quote ---

Define potting.

They have silastic gunks, but are not fully potted.

It is a highly price sensitive market, and no one is putting dollars worth of gunk in a consumer device anymore.

FFS, even BGA chips nowadays are not underfilled.

OTOH, power MODULES are usually potted due to higher profit margin, and higher density requirement (you get to circumvent UL/IEC creepage and clearance requirements by "cementing" exposed coppers with dielectrics). Also, vibration, drop test and thermal shock tests sometimes are only passable with potting.

Some super high density consumer power bricks are potted, like Innergie (Delta)'s so called GaN (which is not) 60W USB-C adapter that is not much bigger than an iPhone cube charger. But when you sell a power brick at $100, you can afford it.

-------------------------

Most MeanWell bricks have a semi-enclosed internal structure. Inside the plastic case, there is usually a metal shield, which is also heatsink of the guts. The metal shield is gunked to the guts with silastic rubber, and sometimes the entire structure is also strategically and selectively taped with Mylar to enhance insulation. But no, it's not fully encapsulated.

--- End quote ---

Meant potting as components are no longer accessible since entirety of open space is filled with epoxy.

LaserTazerPhaser:

--- Quote from: blueskull on May 19, 2019, 10:35:48 pm ---
--- Quote from: LaserTazerPhaser on May 19, 2019, 10:27:31 pm ---Meant potting as components are no longer accessible since entirety of open space is filled with epoxy.

--- End quote ---

Then no.

BTW, epoxy potting over large area is a bad idea, unless it's formulated to match CTE of the chips. It's more for obscuring the module to deter reverse engineering than to provide protection.

For protection, hard rubber is better. You will see modules from proper brands (Vicor, etc.) use hard silicone rubber for large modules, and CTE matched epoxy or other molding material for small LGA modules.

--- End quote ---

Are there any blogs or similar sites showcasing meanwell or another reputable power supply such as TDK lambda brick board and components?

Richard Crowley:
If you want top-of-the-line power supplies (and are willing to pay the top-of-the-line prices) you can look at https://www.acopian.com

TimNJ:

--- Quote from: blueskull on May 20, 2019, 05:08:30 am ---
--- Quote from: LaserTazerPhaser on May 20, 2019, 03:16:48 am ---Are there any blogs or similar sites showcasing meanwell or another reputable power supply such as TDK lambda brick board and components?

--- End quote ---

http://www.chongdiantou.com/

Chinese only. Need translation.

--- End quote ---

This is one of my favorite sites! The tend to showcase mostly Chinese brands, which may OEM for some "American" brands.

I have no problem with Meanwell. They sell *a lot* of power supplies, which means they can actually make a decent quality product at a reasonable cost.

It's when you buy the eBay no-name, no-regulatory-marking adapters that you run into trouble.

Liam:
The most logical in this situation to contact the manufacturer or their technical support. Remember the cost of a mistake can cost the life of your computer.

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