Gan - Page 1
Forum section: electronics / projects

author: Irilia
author_rank: Regular Contributor
timestamp: September 01, 2024, 05:53:39 am
content: I'm trying to find example of Gan adjustable power supply schematic, but I don't find any, (it's possible I don't search the right way) but I need to understand how it works to progress on my power supply.The simple the circuit is the best it is.Thanks Irilia.

author: Andy Chee
author_rank: Super Contributor
timestamp: September 01, 2024, 06:03:13 am
content: Do you understand how a normal MOSFET adjustable power supply works? It will be mostly the same as a GAN adjustable power supply.

author: Irilia
author_rank: Regular Contributor
timestamp: September 01, 2024, 06:25:06 am
content: I know that but for what I looked, in physical power supply, the numbers of components is always way lower in gan power supply, so it's why I'm asking

author: Andy Chee
author_rank: Super Contributor
timestamp: September 01, 2024, 07:20:22 am
content: It would be helpful if you posted a link to where you looked before.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: September 01, 2024, 03:24:43 pm
content: Quote from: Irilia on September 01, 2024, 05:53:39 amYou may have better luck looking for schematics.

author: Irilia
author_rank: Regular Contributor
timestamp: September 01, 2024, 04:43:43 pm
content: Fail 😅 was obviously what I wanted to say.

author: temperance
author_rank: Super Contributor
timestamp: September 01, 2024, 08:55:59 pm
content: This question is very generic. Which type of power supply are you looking for which you think Gan devices will be a better fit?

author: Irilia
author_rank: Regular Contributor
timestamp: September 01, 2024, 11:29:31 pm
content: AC to DC bench adjustable power supply (so the size and Heat is important) (efficiency) 0 to 100V 0 to 30A this is I think I good goal from the output of the power supply.

author: tooki
author_rank: Super Contributor
timestamp: September 01, 2024, 11:42:20 pm
content: That is a very ambitious specification, especially if you mean it to allow 100V at 30A (3000W).Anyway, you made some claims about regular MOSFET vs GaN circuits before. And we asked you to share those schematics. Please do that.

author: temperance
author_rank: Super Contributor
timestamp: September 01, 2024, 11:57:26 pm
content: QuoteYou are thinking about a phase shifted full bridge?There are some reference designs available for phase shifted full bridge converters. But most of those employ MOSFET's. Changing the drive circuits to use Gan devices is possible.Most bench power supplies use two switch forward or two switch fly back converters (maybe interleaved) because non of those ZVS/ZCS converters can handle the wide load range and transient requirements you aim for in a bench power supply of which short circuiting the supply is probably the hardest part to solve. Some well known kW range adjustable switch mode power supplies are current mode two switch forward converters. Nothing beats those when it comes to robustness.If you search the web you will find various attempts at improving the two switch forward to switch under ZVS conditions. But those often require a floating switch of some kind.

author: Irilia
author_rank: Regular Contributor
timestamp: September 02, 2024, 01:13:20 am
content: Very interesting, I have to say the priority is efficiency over size.The double MOSFET option doesn't seem Bad at all (seems more durable, and more efficient).For the short circuit problem generally you use a relay to solve this problem (and a control circuit, but I don't think this is directly part of the power supply).For the efficiency I was curious if I should consider 3 stageSo 3 adjustable input because for what I know if you use a power supply disign for 100V 30A at 5V 1A it will not be really efficient (or it's possible I'm wrong).Thanks.

author: temperance
author_rank: Super Contributor
timestamp: September 02, 2024, 02:41:12 am
content: QuoteMe thinks Tooki will have to wait forever before any of those GaN claims will be proven if you venture into developing a 100 V 30 A power supply.Is this going to be a part of:https://www.eevblog.com/forum/oshw/the-station/msg5623197/#msg5623197If so I think you have a lot to learn. Nothing wrong with that of course. But because of your limited knowledge you underestimate what you are asking. A power supply like this is not something you can copy and paste from an app note and get it working with a little help here and there.I don't want to discourage you but start by learning the basics by developing for example your own 0...24 V 1 A linear power supply without copying and pasting anything from the internet. By doing so you will find out why a relays isn't going to work to protect your power supply.

author: Irilia
author_rank: Regular Contributor
timestamp: September 02, 2024, 04:03:31 am
content: Every power supply have seen use a relay for this Task (I know I still need a very small current to verify if the short is still here.It's effectively part of the station (I know lots of fun in perspective) but I think it's something really missing on the market, the goal is to be able to offer a prosumer product for the highest grade, but I hope some people can help me, it's extremely difficult to understand everything. Some people are just specialist in the domain. I still have lots of work to get every module working together.I wasn't expecting to find already done schematic for this application, it's not how it works in electronic (especially when you want the best efficiency)

author: Andy Chee
author_rank: Super Contributor
timestamp: September 02, 2024, 06:44:05 am
content: Quote from: Irilia on September 01, 2024, 06:25:06 amIn my opinion, component count will be roughly the same.On the other hand, I can understand that physical size may be smaller with GaN. But numbers of components will be the same as MOSFET design.Please provide examples.

author: Irilia
author_rank: Regular Contributor
timestamp: September 02, 2024, 07:16:15 am
content: This for example

author: Andy Chee
author_rank: Super Contributor
timestamp: September 02, 2024, 08:07:46 am
content: Quote from: Irilia on September 02, 2024, 07:16:15 amTo me, that looks like any normal MOSFET design.Please post an example of MOSFET vs. GaN.I specifically want to visually inspect numbers of components.

author: temperance
author_rank: Super Contributor
timestamp: September 02, 2024, 11:40:00 am
content: Don't waste your time on and other peoples time. You have no idea about all that and just guessing.I think you should relax your goals quite a bit. A reasonable bench power supply is about 30 V 1..2 A.The relays question:maybe you've seen a relays on the output of an SMPS. But the relays alone will never protect an SMPS from surviving a dead short. As stated before, what you need is current mode control.

author: coppice
author_rank: Super Contributor
timestamp: September 02, 2024, 11:43:02 am
content: Quote from: Andy Chee on September 02, 2024, 06:44:05 amFor higher powered designs the high power side might have less parts, as you may not need to spread the work over multiple power transistors when there is less heat to deal with.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 02, 2024, 04:49:46 pm
content: Quote from: temperance on September 02, 2024, 11:40:00 amWell, no need to be rude.Quote from: Andy Chee on September 02, 2024, 08:07:46 amIt's a standard package, nowadays; the 8x8 DFN is used for many parts, including Si, SiC and GaN.Another fairly clear signal is: why are they using a schottky rectifier? To justify the cost of GaN on the primary side, surely a sync rect would be used on the secondary. The transformer would likely be smaller as well (reflecting the higher Fsw).---As you can see, there are many indications apparent, even from fairly low-detail photos such as these. Learn to recognize manufacturer logos, figure out how to look up SMT part codes, find datasheets; look into evaluation designs, see how things are typically done, recognize those same circuits (often lifted verbatim, or give or take minor component values or EMI filtering) in products; and most of all, keep reading and learning about everything around you. Electronics is a vast subject, take your time; it was years of study before I was proficient in SMPS, and more and more subtleties continue to show themselves. Over time, your understanding of the world will improve, you'll recognize more and more things at a glance, see why something is done one way or another, etc.Tim

author: inse
author_rank: Super Contributor
timestamp: September 02, 2024, 05:20:12 pm
content: Quote from: Irilia on September 02, 2024, 07:16:15 amThe photo shows a circuit with integrated controller and power stage (U1), this for sure has less components.But is this GaN, do integrated solutions in GaN exist?

author: ebastler
author_rank: Super Contributor
timestamp: September 02, 2024, 05:30:33 pm
content: Quote from: Irilia on September 01, 2024, 11:29:31 pmLinear regulation, of course, and passively cooled -- right?

author: temperance
author_rank: Super Contributor
timestamp: September 02, 2024, 06:07:27 pm
content: Quote from: T3sl4co1l on September 02, 2024, 04:49:46 pmYou are right. I will edit my post.

author: xvr
author_rank: Frequent Contributor
timestamp: September 02, 2024, 06:10:01 pm
content: QuoteWho knows? OP creates combo with this regulator and soldering tools (hot air and soldering gun). May be this is a heater for them?

author: Someone
author_rank: Super Contributor
timestamp: September 02, 2024, 09:48:36 pm
content: Quote from: ebastler on September 02, 2024, 05:30:33 pmat maximum efficiency!

author: Irilia
author_rank: Regular Contributor
timestamp: September 02, 2024, 11:55:00 pm
content: Quote from: T3sl4co1l on September 02, 2024, 04:49:46 pmThanks for your message very interesting, I'm always interested by learning new things, what I'm creating is not technically a new product, it's just creating a product Scalable adapted to everyone, simple, but also by reducing the numbers of components, for example you don't need a screen on every separated device, if you have multiple tool in the same box 😉

author: Irilia
author_rank: Regular Contributor
timestamp: September 03, 2024, 12:05:26 am
content: Quote from: ebastler on September 02, 2024, 05:30:33 pmI what point I was talking about linear regulations, this is the less efficient 🤔

author: Irilia
author_rank: Regular Contributor
timestamp: September 03, 2024, 12:06:12 am
content: Quote from: temperance on September 02, 2024, 11:40:00 amThanks for your help, you are helping me a lot to progress in this project 😹

author: Irilia
author_rank: Regular Contributor
timestamp: September 03, 2024, 12:13:01 am
content: Quote from: xvr on September 02, 2024, 06:10:01 pmI have a heat pump way more efficient to heat a room.More seriously I said efficient so it doesn't waste electricity to heat (when one of the module is not in use the power supply is totally disconnected)

author: inse
author_rank: Super Contributor
timestamp: September 03, 2024, 05:10:33 am
content: Irilia, I would like to ask two questions.What do you expect this discussion to lead to?Did you design a power supply yet, what is your experience level?

author: Irilia
author_rank: Regular Contributor
timestamp: September 03, 2024, 06:03:34 am
content: I'm beginner in designing circuit board, or complicated electronic. My goal was to get some information about the gan technologies, being a "new" technology not all the information are as simple to find.

author: ArdWar
author_rank: Frequent Contributor
timestamp: September 03, 2024, 06:17:00 am
content: GaN(FET)isa MOSFET. It works exactly like any other (Si, SiC) MOSFET. Power supplies with it uses the same topologies with any other MOSFET. Any difference is minor (in general sense of things) adjustment for difference in gate voltages, and operating frequencies to exploit its strength.For what it worth, personally I don't think GaNFETs give that much performance benefit over traditional silicon FETs. It has potential for higher efficiency at smaller size, but you aren't gaining much if you aren't size constrained.

author: Andy Chee
author_rank: Super Contributor
timestamp: September 03, 2024, 06:18:26 am
content: As a beginner, the first thing you need to understand about GaN is why they are "better" (or worse) than Si MOSFETs.For example, do you know anything about the trr specification of GaN vs. Si MOSFET? and the consequences for the design?Many products don't use "GaN" as a technical feature, but as a marketing buzz word, much like Sega Mega Drive's "blast processing". If this is the depth of your GaN knowledge, then I would delete this specification from your design requirements, and go back to basics.

author: coppercone2
author_rank: Super Contributor
timestamp: September 03, 2024, 06:28:12 am
content: I think you should go to SiCFET instead of GaNFet

author: Irilia
author_rank: Regular Contributor
timestamp: September 03, 2024, 06:50:40 am
content: Quote from: Andy Chee on September 03, 2024, 06:18:26 amThe size and heat is important is an important enough points in favor of Gan in this project, the space is not unlimited and I will prefer as much as possible to avoid having to add any additional cooling. The case are in aluminum, so it's basically a big cooler. Passive cooling is completely silent, but also avoid dust.I don't need any marketing buzz word for an open source project.I have to note I will have multiple power supply, and they are all insulated, from the main, but also from each other 😉

author: Andy Chee
author_rank: Super Contributor
timestamp: September 03, 2024, 06:58:27 am
content: Quote from: Irilia on September 03, 2024, 06:50:40 amUnfortunately, this is not enough information to favor GaN.

author: Irilia
author_rank: Regular Contributor
timestamp: September 03, 2024, 07:03:18 am
content: Quote from: Andy Chee on September 03, 2024, 06:58:27 amWhat other do you consider as being the advantage of Gan ?

author: Andy Chee
author_rank: Super Contributor
timestamp: September 03, 2024, 07:06:41 am
content: Quote from: Irilia on September 03, 2024, 07:03:18 amGaN is advantageous in hard-switched applications, the most dominant one being bridge-less power factor correction, 99% efficiency.GaN disadvantage is that hard-switching generates more harmonics/EMI, and therefore requires more/larger filtering and careful board design layout.

author: ArdWar
author_rank: Frequent Contributor
timestamp: September 03, 2024, 07:17:14 am
content: I mean, if you want to experiment with GaNFET then just buy some and build a design with it. No need to gatekeep here. You're lucky that they recently start to come in more sane package. Some even packaged with gate drive. External controllers are also getting more common. You can find some newer PWM controller to be released in two versions, ~5V Vgs for GaN and ~12V Vgs for Si(C).However if you have zero experience with SMPS, it might be better to start with something simpler.

author: inse
author_rank: Super Contributor
timestamp: September 03, 2024, 09:43:32 am
content: 100% agreeand I think we should close this discussion

author: temperance
author_rank: Super Contributor
timestamp: September 03, 2024, 12:07:49 pm
content: The OP has this idea to build an open source tool called "The Station".The OP has almost zero knowledge about how to develop "The Station" and as such he is now searching for horses to put in front of his cart. As a reward for your sweat and hard work your name will be mentioned on the webpage of the open source product.Maybe I'm wrong (my beard starts to be grey) but I don't think that's how the world works and I find this very impolite and rude. Anyway I'm going to take care of my open sores.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 03, 2024, 06:21:27 pm
content: Quote from: ArdWar on September 03, 2024, 06:17:00 amActually they aren't -- they are HEMTs. The difference in the nature of the channel is significant ("high electron mobility"), but not actually so important for electrical behavior -- behaviorper areayes, but at the board level we can't know/care about chip density too much. But the gate has direct in-circuit consequences. In particular, the gate is constructed of semiconductor layers, doped in such a way as to impress a built-in electric field making it enhancement mode (when applicable), and, one in-circuit consequence is significant leakage current: up to some mA at rated voltage.This is also why you don't want to overdrive the gate: either it breaks down catastrophically (I haven't tested..!), or it zeners (in which case you literally cannot overdrive it, the voltage becomes fixed and overcurrent ensues). AFAIK, gate current has deleterious effects, hence the rather low and precise operating limit.GaN is a wide bandgap material, basically meaning, if you forward-bias the not-gate junction, it conducts, with about as much Vf as band gap; combined with structural reasons, it's actually more like double for the gate, hence the 6V limit for a ~3eV material.I *think*. That last part is very hand-waved, but there are also a few ways I think to construct them, and it might also be tunneling current instead. Also depending on if it's low voltage (e.g. EPC's eGaN line) or high, and, I haven't studied the fab-level details much (also somewhat hard to find, short of journal articles), or what particular lines are using what particular technology.Hah actually, this one even gives gate curve... sort of. Fractional mA scale. No absolute maximum Ig though.https://assets.nexperia.com/documents/data-sheet/GAN190-650FBE.pdfAnyway, gate current mainly means you can't just cap-couple it and expect it to work; a regular CMOS style driver is sufficient, but you'll have a rough time employing certain tricks.The construction also means there's no body diode (or not that you'd want a GaN PN diode anyway, though the blue/UV emission would be a cool party trick), which means synchronous rectification is almost mandatory.Having literally no body diode, means it reverts to an asymmetrical JFET behavior: the negative Vds region acts like a source follower, i.e. the V-I curve is simply the gate transfer function, hence the soft curve and no stored charge.Other differences include avalanche behavior (rather, the complete lack thereof), the generally minuscule die (pitiful SOA / overload capacity / robustness; compare a rocket engine to a diesel engine, it's crazy powerful but one misstep and it explodes catastrophically), and the high speed making even very good layouts an electromagnetic embarrassment, heh.QuoteSi is impressively good for what it is. The main things these days are, in high voltage ratings, SJ is king, but SJ contributes a hysteresis loss mechanism that can't be avoided even by use of resonant architectures -- or, it can by slowing down switching edges extraordinarily, but that's not at all practical, and by then, your Fsw is so low (10s kHz?) that it doesn't matter anyway.It's funny, because resonant Si is so efficient that, comparing to yesteryear's planar MOSFETs -- if you even chose devices big enough to achieve the same conduction loss (and you probably didn't, big dies = $$$), you'd pay just as much in sheer gate drive power, as SJ loses in hysteresis. SJ is an impressive advancement, all in all -- just that it isn't without drawbacks.(Si below 200V or so, is not SJ; it's probably coming, but for now, they can't make fine enough structures to take advantage of it. So for now, lower voltages are ~free of hysteresis loss. Low voltages also cost less Eoss (drain capacitance/charge energy storage / loss), making hard switching just as acceptable; it's not even that hard to make a, say, RC motor drive with >98% efficiency.)(Also for the same reason, SiC does not use SJ: basically a 700V SiC MOSFET is the same geometry as a planar 100V Si MOSFET, just fabbed in a different material, and whatever other process adjustments of course. So they also have low hysteresis loss. It's probably coming, but also probably not important until ratings of several kV -- devices that are, at least very dangerous to use for one thing, but also tend to be tightly controlled. There are SiC MOSFETs and IGBTs up to 12kV I think, but good luck finding them actually for sale -- implied: without extensive licensing, NDAs, ITAR, etc.. There aren't many customers for products that high, anyway, so marketing them isn't really needed, not in the usual way anyway.)GaN is good at two things: high density (the transistors are very small), and high efficiency. Granted, efficiency is in part mandatory, given the limited power dissipation (of the small devices themselves, or of the overall PSU), and also kind of an imperative that, if we're going to spend more on these, it better be worth it. It has fast switching (the speed figure-of-merit is wild, say 2-10 times faster than Si of equivalent ratings), which compounds on density: realize the transistors themselves are but a tiny part of the overall build, and magnetics and capacitors dominate the envelope of a power supply. (And isolation gaps, heh, but that's solvable with another expense: potting.) By kicking Fsw up very high (maybe low MHz even), transformers can be shrunk quite a bit -- mind, not at all proportionally so, it's more like a 2nd to 4th root of the frequency ratio, available materials aren't simply proportionally better, wire losses are harder to control, kind of everything is a little worse -- but, also if we raise frequency like a whopping 10x, we still get a big savings on size. And instead of electrolytics, we use polymers or ceramics, particularly on the output side where much less filtering is required. We can't avoid a bulk cap on the primary side, at least not easily*, so that's going to be electrolytic for a long time, but everything else can be shrunken down. And electrolytics themselves are still improving by tiny increment, year on year.*I've seen the strategy, to use a poled electret ceramic capacitor (these are a standard/available part, if still rather boutique) with a switching converter, to effectively multiply the capacitance at the input port. Basically, a swing of say 20V (out of 400V average or whatever) is magnified to 100 or 200V of swing at the ceramic capacitor, right in the middle of its C(V) curve (whereas an unpoled ceramic has maximum C around 0V, a poled one has it off-center, thus giving useful bypass value, and radically higher energy storage, under bias), thus making a few uF look like 10s or even 100s of uF from the outside. Huge bother (complexity, cost) for not much improvement otherwise, but if you absolutely must pack something into a small envelope, or save weight -- that's one way to do it.Especially with responsive designs like low-Q resonant and QR/BCM flyback, the amount of circuitry needed on the secondary side can be impressively low; it really shows off one possible end-goal of power supply design: to have one central energy-storage reservoir, and to transform that into usable power at the far end, as quickly and efficiently as possible. That is, if all the output energy per cycle is delivered within that cycle more or less, we only need as much output energy storage as required to smooth over between cycles -- and maybe a little extra for EMI filtering. Output stage can simply be transformer, rectifier (SR preferably for efficiency), filter, and output terminals.Likewise for the ever-increasing speed of PoL (point of load) (DC-DC) converters: filtering requirements are less and less, and thus the cutoff frequency of the converter rises; that is, any change in load consumption, is very quickly communicated to the input side as change in current draw.The most general takeaway is: a switching converter is a low-pass filter, an energy storage element. The less energy stored, the faster and more responsive it must be.If you compare the voltage-mode CCM forward converters of past generations (ye olde AT(X) PSU) to now, quite a lot of space is taken up on the secondary side -- huge filter chokes, electrolytic capacitors, and probably an LC clean-up stage after that besides. Maybe 40% of total board area, when it might be more like 20% now (at least in the power section; control circuits can still take up some board area). The cutoff frequency of a voltage-mode controller is typically some kHz (for Fsw in the maybe 40kHz range; these were mostly BJT based half-bridge inverters), so the secondary-side energy capacity is huge. Nowadays with a resonant design, cutoff can be over 100kHz and mostly ceramic caps suffices for output filtering; in at least a few cases I've seen, the requirement for secondary-side electrolytics actually comes from the feedback opto's limited response speed (~10kHz cutoff?); seems insane for such an advanced design to be limited by such a silly part, but it's surprisingly hard (or slow?) to innovate in regard to opto performance.Or kind of the converse, you could run a PFC stage on the primary and nothing else, and get essentially rectified (moderately regulated) DC at the output. That is, the power flowing through the isolation transformer is a function of instantaneous input voltage, varying during the cycle. The downside is the bulk cap's low voltage rating: higher voltage electrolytics have better energy density, so it's better to put it on the primary side instead.Tim

author: tooki
author_rank: Super Contributor
timestamp: September 03, 2024, 06:34:56 pm
content: Quote from: temperance on September 03, 2024, 12:07:49 pmI don't think OP is trying to be impolite or take advantage of people, I think they're just wildly underestimating the complexity of their endeavor, since I don't think they're very experienced. They don't yet know enough to realize all the things they don't know, but need to for this project. I get it, I've been there before (but luckily had people to help me reign that in and guide it towards something doable).

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 03, 2024, 06:36:30 pm
content: Given the earlier comment, I choose to read this thread as an "asking for help / learning" one, with the over-ambitious project as a potential framing device, but not actually likely (or important) to succeed as a complete project.Tim

author: Andy Chee
author_rank: Super Contributor
timestamp: September 03, 2024, 06:38:25 pm
content: Quote from: T3sl4co1l on September 03, 2024, 06:21:27 pmNow that you mention that, blue/UV GaN emissions evokes memories of the old glass mercury arc rectifiers, which seems somewhat poetic for power electronics.

author: temperance
author_rank: Super Contributor
timestamp: September 03, 2024, 06:53:14 pm
content: @ T3sl4co1lEverything you wrote is beyond the comprehension level of the OP. If you would read what he posted, you would know that the OP can't read what you posted. I also don't think this is an "asking for help" post.Here is an excerpt from the first attempt at finding horses.https://www.eevblog.com/forum/oshw/the-station/msg5623197/#msg5623197QuoteI don't know what others make of this.

author: inse
author_rank: Super Contributor
timestamp: September 03, 2024, 07:00:23 pm
content: N/R

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 03, 2024, 08:48:19 pm
content: Quote from: temperance on September 03, 2024, 06:53:14 pmYou're right -- even when I'm not replying to the OP, I should just not even try, but instead delete whatever posts other readers might find helpful. This should greatly improve the readability of the forum -- thanks!..."Finding horses", an unfamiliar idiom (translated maybe--?), but gets the jist.Tim

author: ricko_uk
author_rank: Super Contributor
timestamp: September 03, 2024, 08:57:05 pm
content: This might be what you initially asked for and has links and infos to solutions:https://www.allaboutcircuits.com/news/new-gan-power-supply-ic-delivers-up-to-85-watts-without-heatsink/

author: coppice
author_rank: Super Contributor
timestamp: September 03, 2024, 08:59:24 pm
content: Quote from: Andy Chee on September 03, 2024, 07:06:41 amThe first of those things does help with the second. Less heat means you can get the filters in really tight around the power parts, where they are most effective.

author: Andy Chee
author_rank: Super Contributor
timestamp: September 03, 2024, 09:00:29 pm
content: Quote from: temperance on September 03, 2024, 06:53:14 pmIt feels like the OP is imitating Thomas Edison/Steve Jobs in that they're trying to get others to do the research & design, then they can do the marketing & branding.

author: Irilia
author_rank: Regular Contributor
timestamp: September 03, 2024, 11:13:12 pm
content: Quote from: temperance on September 03, 2024, 12:07:49 pmPlease read the profile of people before insulting them, I'm a woman !Ps) I don't know what perks you expect on an open source project, with no lucrative goal,I can offer to pay the long-term contributors the same as me and my dev.I just want to say it's a collaborative project, my goal is not to become popular from it, it's just to offer to the community, a good product long lasting easy to repair and upgrade.

author: Irilia
author_rank: Regular Contributor
timestamp: September 03, 2024, 11:15:18 pm
content: Quote from: temperance on September 03, 2024, 06:53:14 pmPlease read the profile of people before insulting them, I'm a woman !Ps) I don't know what perks you expect on an open source project, with no lucrative goal,I can offer to pay the long-term contributors the same as me and my dev.I just want to say it's a collaborative project, my goal is not to become popular from it, it's just to offer to the community, a good product long lasting easy to repair and upgrade.

author: Irilia
author_rank: Regular Contributor
timestamp: September 03, 2024, 11:48:09 pm
content: Quote from: T3sl4co1l on September 03, 2024, 06:21:27 pmThanksA lots of things to learn, but also I understand the majority of what you explains, obviously apply it on a circuit is way more complicated.I'm happy you take the time to explain the difference, and the circuits aren't the same between the different types.And yes I'm sure this can be interesting for others person because gan is still a new technology for the power supply (it should also be cheaper in the future because it's more simple to produce than the other type >https://community.element14.com/products/manufacturers/wuerth-elektronik/b/blog/posts/gallium-nitride-vs-silicon-in-soft-switching-comparative-study.

author: Irilia
author_rank: Regular Contributor
timestamp: September 04, 2024, 12:06:00 am
content: Quote from: tooki on September 03, 2024, 06:34:56 pmOp know it's a very complicated project, but she also knows it not that complicated if the community help.Because everyone can't know everything, but multiple people with different capacity can do a lot of things.Don't worry I still have a lot of work in the background for this project, I will also have a website (I don't give the name for now because it's complicated to find a good domain name available what I have found. The website is for the resources for my different projects (No Ad or tracking Cookie).

author: temperance
author_rank: Super Contributor
timestamp: September 04, 2024, 03:33:35 am
content: QuoteMy apology on that part.QuoteWhat do you and the dev expect in return? Nothing? You are willing to spend multi K euro's on a project and many days, nights, evenings, weekends,... and in the end live in a carton box while shops are distributing the station which some companies produce for one tenth of the price you would pay?I expect at least three honorable mentions in a well known magazines so I can decorate my carton box.QuoteI think you and the dev must have a conversation with she.

author: shabaz
author_rank: Frequent Contributor
timestamp: September 04, 2024, 04:07:54 am
content: Quote from: temperance on September 04, 2024, 03:33:35 amIs that really necessary? If you think it's impractical or over-ambitious, then after you've stated that, why not leave it be and try to live up to your username.I don't have any comment on this discussion, but just reading, it paints a lot of non-engineering-related, and actually sexist, negativity as a picture, for anyone who reads the thread, when you respond like that. It's not professional.

author: coppercone2
author_rank: Super Contributor
timestamp: September 04, 2024, 04:43:11 am
content: you need to renegotiate your salary if a few K project makes you live in a carton as a engineer.who is gonna pony up and buy the first GaNFET?https://www.radiomag.com.de/product/gpihv30dfn.htmlhttps://iganpower.com/ganpower-demonstrates-industrys-first-1200-v-single-die-e-mode-gan-power-devices

author: ArdWar
author_rank: Frequent Contributor
timestamp: September 04, 2024, 04:55:49 am
content: I don't know about sexist tendencies here. However it does a bit concerning to let someone who admit themself having no/little experience in power supplies or electronics in general suddenly jumping to make wide range dual control variable SMPS, probably mains powered too.Quote from: T3sl4co1l on September 03, 2024, 06:21:27 pmOf course if you look closely at them they are different. But looking at application level there aren't that much difference. At least not to the point that you need a new topology, for both the supply itself or the control/drive.

author: shabaz
author_rank: Frequent Contributor
timestamp: September 04, 2024, 05:14:58 am
content: Quote from: ArdWar on September 04, 2024, 04:55:49 amWhy are you making excuses for it? That sentence from temperance was completely unnecessary, and not on. What's that sentence got to do with sharing a concern about lack of experience in working with mains equipment?And for the record, even first-year undergrads often end up having to build a mains-operated power supply, under supervision.

author: Irilia
author_rank: Regular Contributor
timestamp: September 04, 2024, 05:43:49 am
content: Quote from: shabaz on September 04, 2024, 04:07:54 amThanks.

author: Irilia
author_rank: Regular Contributor
timestamp: September 04, 2024, 05:54:06 am
content: Quote from: ArdWar on September 04, 2024, 04:55:49 amI do some electronics for more than 10 years, and I watch electronic/engineering for more than ten years (yeah some people watch tictoc or the Tv)So thanks to underestimate me, yeah I have some difficulties, but the electronic in general have some difficult points to understand.

author: temperance
author_rank: Super Contributor
timestamp: September 04, 2024, 11:56:28 am
content: An illeism is the use of the third person in reference to oneself and, in this case, used to convey a sense of objectivity. In any case what I said is not meant as sexist. The third person could be "he" as well.An open source power supply:https://www.eevblog.com/forum/projects/eez-h25005-a-possible-successor-of-eez-h24005-programmable-power-supply/This has taken some years to develop. Maybe two or three.An open source soldering station:https://www.eevblog.com/forum/reviews/diy-weller-wmrpwmrt-soldering-station-project-(open-source)/All the best.