A couple days ago, after the TopTon had my mini pc's motherboard for a month, I raised a ticket with aliexpress as I wasn't getting anywhere. In the end, I managed to get a full refund (discussion
here). So, now I have an heatsink to reuse for something else, and the power supply itself.
As I had done some prior testing on the PSU in
this post, today I've decided to actually take it apart and have a look at it, most importantly to see if it's a genuine LiteON and what components are inside.
Overall I've been quite surprised. The power supply looks to be an actual LiteON, as both the pcb and transformer are clearly marked. The overall build quality is very good. I've since closed it back again, I'll keep it as a spare or use it for other DIY stuff.
Those are the main components:
Input protection: two fuses, a general 6.3A which protects the MOV and a 3.5A for the psu itself
input filtering: common mode choke and a single polypropilene 0.22µF on the input side.
Bridge: KBP208G, 2A 800V.
Main capacitor: 130µF 400V Nichicon 105°C pt series.
Main switch: AOTF8N65, N-Channel MOS, 750V, 8A 1.15ohm RDS(on)
Transformer: Lite-ON SL130
Secondary rectification: SBR20A100CT
Secondary Caps: Taicon 16V 1000µF x2 + Nippon Chemicon 16V 220µF after the filtering inductor. All caps are 105°C rated.
Secondary protection: S8M02-600B across the output, as a crowbar. Possibly an OVP protection?
The whole back of the PCB the is conformal coated, the main IC is a SOT23-6 which I was not able to read anything off. There is a very good separation between primary and secondary.
Some pics: