LED powersupply usable for using in electronics? - Page 1
Forum section: electronics / projects

author: eTobey
author_rank: Super Contributor
timestamp: December 04, 2024, 08:05:57 pm
content: Hi,i am wondering, if i can use a LED power supply to power a DPS5005. I am aware, that there are supplys that have a constant voltage or constant current.Has anyone some knowledge about this?

author: PCB.Wiz
author_rank: Super Contributor
timestamp: December 04, 2024, 09:32:07 pm
content: The light load operation of LED supplies may be unspecified, so you may need some added resistor/ zener min load handling, easy enough to test.

author: Zero999
author_rank: Super Contributor
timestamp: December 04, 2024, 09:37:41 pm
content: What LED power supply? It's a silly question without that information.

author: eTobey
author_rank: Super Contributor
timestamp: December 04, 2024, 11:24:45 pm
content: This one:https://www.leds24.com/48v-einbaunetzteil-stabilisiert-4,1a-200watt#

author: Zero999
author_rank: Super Contributor
timestamp: December 05, 2024, 04:12:51 pm
content: Quote from: eTobey on December 04, 2024, 11:24:45 pmNo, because the power supply has an output power of 250W and your LED PSU (even if it is constant voltage, which I'm not sure of because I don't speak German) is only 200W. There's no mention of the input power requirement, so choosing a PSU with an output power rating of at least 300W is a good idea to account for losses, as it won't be 100% efficient.https://joy-it.net/files/files/Produkte/JT-DPS5005/JT-DPS5005-Manual.pdf

author: eTobey
author_rank: Super Contributor
timestamp: December 05, 2024, 06:08:39 pm
content: It was actually a general question. Thats why i did not include that device. Of course i know that 200W wouldnt be enough.

author: Zero999
author_rank: Super Contributor
timestamp: December 05, 2024, 07:49:27 pm
content: Quote from: eTobey on December 05, 2024, 06:08:39 pmIf you knew 200W wasn't enough, then why ask?It was general to the point of being meaningless. It's like asking whether a battery could be used to power it, without specifying the battery.

author: eTobey
author_rank: Super Contributor
timestamp: December 06, 2024, 10:53:56 am
content: Quote from: Zero999 on December 05, 2024, 07:49:27 pmI did not ask about the 200W.I have asked to get some competent answers like post No. 2.

author: tunk
author_rank: Super Contributor
timestamp: December 06, 2024, 11:27:27 am
content: (According to the manual you can set a limit for max output power.)

author: Zero999
author_rank: Super Contributor
timestamp: December 06, 2024, 01:40:10 pm
content: There are two different types of LED power supply: constant current and constant voltage. You need the latter.It must not have PWM or significant ripple on the output, but a stable voltage.It must be capable of outputting enough power at the right voltage and current to power the power supply.Why not simply buy a 300W constant voltage PSU? 24V is probably optimal, since the PSU can step up, as well as down and it's half the output voltage.For future reference, ask specific questions and post in the beginner's section, if you're unsure, because you'll get an easier time.

author: eTobey
author_rank: Super Contributor
timestamp: December 08, 2024, 05:19:56 pm
content: Quote from: Zero999 on December 06, 2024, 01:40:10 pmI know (i wrote also that i know this).Thats why i asked for such things, or other shortcomings of such.Why are you still botherung me with the power? Thats some information i dont need, as you should have noticed, and those kind of information i tried to prevent, by posting NOT in the beginners section...

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: December 08, 2024, 05:39:45 pm
content: I have come across constant-voltage LED PSUs with significant ripple on the output, as this doesn't matter much for LED applications.Anything specifically marked as a LED supply should be treated with suspicion.

author: Siwastaja
author_rank: Super Contributor
timestamp: December 08, 2024, 08:02:34 pm
content: There is no generic answer, because "LED power supply" does not mean anything specific - manufacturers use it to mean whatever they want. Some are just usual off-the-shelf constant voltage supplies branded for whatever marketing segmentation reasons. Some are constant-current drivers.

author: Zero999
author_rank: Super Contributor
timestamp: December 08, 2024, 08:09:25 pm
content: Quote from: eTobey on December 08, 2024, 05:19:56 pmWhat are you asking then? What information do you need? Or is this a troll? I've given the benefit of the doubt and tried to help, which was obviously against my better judgement, as it clearly isn't appreciated.EDIT: Thread added to ignore list.