High (er) Voltage Bench Top Power supply ? - Page 1
Forum section: electronics / testgear

author: Purduephotog
author_rank: Regular Contributor
timestamp: November 08, 2020, 03:24:21 am
content: Lots of 0-30, 0-32V PSUs, and then a really neat video on a buck/boost regulated one where you supply all the other hardware...But I haven't seen many threads detailing higher voltage units... or I'm failing at searching.I know there are issues going over 60V DC for code purposes. I'd like 70, but I'd like a lot of things in life.My 0-32V unit just isn't cutting it to diagnose LED strips for TVs, as they need 38.2V (give or take). So a higher voltage unit would be nice.Single channel is all I need but I wouldn't be opposed to having dual. I know that drives cost up.If there is a sticky about higher than 30V psus, I truly apologize for not finding it.Thank you.

author: bdunham7
author_rank: Super Contributor
timestamp: November 08, 2020, 03:29:38 am
content: Dual output supplies are usually isolated and can be connected in series. They will actually have 3 modes--independent, series and parallel. So my 0-24V BK Precision 1652B will give you 48 volts.

author: TERRA Operative
author_rank: Super Contributor
timestamp: November 08, 2020, 07:57:14 am
content: The HP E3612A will give you 60V/0.5A at 30W, or the E3617A will give you 60V/1A at 60W. They can be picked up for reasonable cost if you look around.I have the E3612A (along with two E3611A's and an E3610A) and it works well.

author: PKTKS
author_rank: Super Contributor
timestamp: November 08, 2020, 08:41:30 am
content: https://www.aliexpress.com/item/4001155350991.html

author: Purduephotog
author_rank: Regular Contributor
timestamp: November 08, 2020, 02:28:19 pm
content: Quote from: PKTKS on November 08, 2020, 08:41:30 amThat is... rather awesome!It would solve the immediate need for this problem, but there are other times I've run into (such as LiPo and other items) that I needed higher voltages.I might get this anyway though. Thank you!

author: PKTKS
author_rank: Super Contributor
timestamp: November 08, 2020, 03:56:35 pm
content: there are indeed other models... with more or lessmore features..Paul

author: The Soulman
author_rank: Super Contributor
timestamp: November 08, 2020, 04:05:03 pm
content: As always watch the polarity when using such testers, one mishap will kill at least one led in the string.

author: Purduephotog
author_rank: Regular Contributor
timestamp: November 08, 2020, 04:19:01 pm
content: Quote from: TERRA Operative on November 08, 2020, 07:57:14 amYouch, priced out of my league right now, but that's OK- that's some more information.Have you seen any videos or teardowns on other units for 0-60V?

author: nctnico
author_rank: Super Contributor
timestamp: November 08, 2020, 04:28:28 pm
content: Quote from: Purduephotog on November 08, 2020, 03:24:21 amLook for one of the Gophert power supplies on Aliexpress for example. The NPS-1602 (60V 3A) would be a model which fits yours needs. Putting 2 in series to get higher voltages should work.

author: MadTux
author_rank: Frequent Contributor
timestamp: November 08, 2020, 04:29:05 pm
content: Or stack a couple of E3617As, output is floating, as it has to be with any good lab PSU.Maximum rating is +/- 240VDC relative to earth, so you can stack 4 of them together.If I need standalone unit, I picked up a nice Philips PE1527 for cheap a while ago, does 150VDC@3A.It's huge and indestructable, though.

author: Purduephotog
author_rank: Regular Contributor
timestamp: November 08, 2020, 09:36:30 pm
content: I have the lower voltage one and am really happy with it- took it into the metrology lab and while not perfect (by aerospace standards) it was close enough for lab work.Does that mean you have first hand experience with the 60V units?Yes, I was looking for stand alone. I've got lots of buck/boost converters, I just didn't really want to make something right now.

author: nctnico
author_rank: Super Contributor
timestamp: November 08, 2020, 10:05:19 pm
content: Quote from: Purduephotog on November 08, 2020, 09:36:30 pmWell, I just checked out the internals and tested it using a DC load.

author: switchabl
author_rank: Frequent Contributor
timestamp: November 09, 2020, 12:22:51 am
content: TTi have the PLH series, with 120V/0.75A and 250V/0.375A models available (single channel only). Probably overkill for testing LED strips, but worth a look if you want a high-quality linear supply with a clean output. Quite compact too. I think the price is really reasonable considering that it is something of a niche product (at least without the remote control option), but of course nowhere near aliexpress cheap.

author: DaJMasta
author_rank: Super Contributor
timestamp: November 09, 2020, 01:09:50 am
content: Quote from: bdunham7 on November 08, 2020, 03:29:38 amThe Siglent SPD3303X series does the same with somewhat higher max (can go to 32V per channel), and I believe the DP832 does the same, it's definitely a common feature among multiple output supplies and having series or parallel mode available makes a multichannel unit a lot more versatile than most single channel units. Some of the single channel models are generally available in variants that go up to 40-50V, but to go beyond that you need to look at high voltage supplies, generally, but there's a fair bit of variety, especially if you're willing to consider older models on the used market.