Electronics and technology blog    /    Materials for March 2020 year

You’ve probably heard of GaN technology by now, even if you’re not particularly interested in the world of modern power supply design. But this is the first time I’ve had a power supply like this, and today I’ll try comparing it with an almost identical model from the same company. Inspection, tests, comparison, measurements—as usual.

They sent over a coupon for three Choetech products, and I thought it might be useful.

I’ve finally gotten around to the XYS3580 converter, which has been written about more than once. So why not take a look? It has a universal input and delivers up to 80 W. As it turns out, though, it has plenty of “quirks” that I want to tell you about today. A look inside, tests, oscilloscope traces, and a modest attempt at putting it to use.

I recently published two reviews of 32700-size LiFePO4 batteries. At the time, I wrote that I’d like to use them as replacements for conventional lead-acid batteries. Then, quite by chance, I got my hands on a brand-new CSB HRL-1234W battery, the kind used in UPS units, and I wanted to see “what’s what.”

Today I'm reviewing a somewhat unusual device. Due to a few circumstances, this review will be short and won't include everything you're used to seeing here. That's just how things worked out—and maybe that's for the best.

Not long ago, I reviewed VariCore 32700 LiFePO4 batteries. At the end, I mentioned that I’d ordered the same batteries from the same store, but under the Liitokala brand. The batteries have now arrived and been tested, and, most importantly, I was able to compare them with the previous ones. It turns out there’s a significant difference. But as usual, you’ll have to read the review to find out all about it.

I left this power supply for what you might call “dessert,” partly because it stands out from the rest of the units shown earlier, and partly because I simply liked it more than the others. In any case, that’s not particularly important, and today I’ll tell you about a power supply that needs no modifications.

I've already reviewed various converters, both large and powerful and really tiny ones. Today I'm going to take a closer look at a very compact version of a fairly powerful converter, with an output current of up to 4 A. Tests, oscilloscope traces, graphs—as usual :)

Continuing my series of power supply reviews, today I’m looking at some used boards. They have relatively convenient output specifications, which is why I ordered them for review. As always, the review includes a detailed inspection, schematic, tests, analysis, and conclusions.

When I first started writing this review, I had no idea where it would lead. In the end, I inadvertently ended up with a “two-in-one” review, even though it’s essentially about the same power supply. As always, the review will cover the inspection, schematic, tests, more tests, and conclusions.

I got the chance to test some more power supplies, and today I’m reviewing the first one. As always, the review will include an inspection, analysis, circuit diagram, tests, and conclusions.