Reverse engineering a TL494 based Chinese

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LadyN

Guru

Joined: 26/01/2019
Location: United States
Posts: 408
Posted: 08:12pm 28 Jan 2019      

When reading this forum I came across this interesting TL494 based Chinese boost converter often claimed as 1200W, 1500W or even 1800W

https://www.aliexpress.com/item/1200W-20A-DC-Converter-Boost-Step-up-Power-Supply-Module-IN-8-60V-OUT-12-83V/32767522358 .html

I quickly ordered it but I am surprised to see no schematics for it online!

I spent a few hours looking for detailed pictures of the unit and see that it has:

1. Output voltage control
2. Output (or input?) current cutoff (often mislabelled as "constant current" setting)
3. ULVO (input voltage cutoff)

Have anyone else on this forum looked at this board?

  hotwater said  I've torn that system apart to work with a modified TL494 board for someone else.


Hi hotwater, are you talking about this specific board or another boost one?