Teardown Monoprice 40W USB C Power Adapter

Teardown Monoprice 40W USB C Power Adapter

In this video I am tearing down the Monoprice 40W USB C 42620 Power Adapter. I examine what an example of a safe power adapter is.

The intermediate voltage is constant at 10.4 VDC in both the 9V and the 5V modes and under load or no load.

Optocoupler: Everlight EL1019
MOSFET: Navitas GAN NV6115
MAIN Controller: NCP1342-D
USB Controller: Southchip SC8102
Secondary MOSFET: TECHCODE
SAFETY CAPACITORS: WQC Brand

Timestamps:
00:00 Introduction
00:52 Opening it Up
04:00 GaN
07:30 Safety
08:40 Conclusion

This device (currently out of stock as of 2/11/2022)

Paid links to help the channel

Equipment:
Video Editing Software: Davinci Resolve 17
Video Camera / Still Camera: Sony ZV1
Lights: Three VILTROX VL-200T
Microphone: Rode SmartLav+
VARIOUS LAB EQUIPMENT

#72

[targaR]

Great teardown, looks like a lot of thought and engineering when into that design. Nice to see Monoprice building quality hardware. Thanks for the video :)

[LotosHans]

On the outside it looks very similar to the Amazon Basics USB chargers. They are manufactured in Vietnam as well, maybe the same supplier?

[brettasetera]

Good video - as a materials scientist I have to say it is weird hearing it spoken aloud as "G-A-N" instead of saying GaN like 'can' with a G.

[stellarproductions]

Truly excellent tear down, and diagnosis. I really like how you go into every detail, regarding the construction quality, components used, and the positives, as well as the negative failings. I too saw a previous tear down of yours that showed the pinched wires deal, I really think this is one of those negative failings. I'd really like to see some more safety observed with no pinched wires, or better yet, no wires at all. GAN seems to be the new technology today, some claim to have GAN II or GAN III as well.

[MattSuozzo]

What do those plastic pieces on the board do? Is that for insulation or something?

[ewicky]

I learned so much! I'd be interested to find out what the intermediary DC voltage level is. It could be 9V, but it be higher, like 24? I wonder how the designers decide on which voltage to use. Maybe you could, with safety precautions, power it up and probe it, since it appeared to be a non-destructive teardown.
Or save the probing for another teardown video altogether. I also understand if you don't feel comfortable powering up an exposed circuit, I wouldn't either.