EEVblog 1606 - $45 AlienTek DP100 100W USB-C PSU REVIEW - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: March 29, 2024, 09:08:57 pm
content: AlienTek DP100 100W USB-C PSU REVIEWhttps://s.click.aliexpress.com/e/_DeWCLIN00:00 - AlienTek DP100 100W USB-C PSU Unboxing02:43 - Power on and operation08:57 - User Manual10:01 - Trying USB-C source10:44 - Setting Menu12:00 - uSupply Inception12:55 - Physical size comparison13:16 - Teardown14:44 - PCB Inspection and design analysis18:14 - BOM Consolidation & MOSFET's19:15 - USB Power Delivery Chip20:46 - MP9928 Buck Converter & PWM Current Limiting23:37 - Zero drift opamps24:14 - Processor24:52 - Connector LED lighting26:09 - Housing26:39 - DC input testing27:28 - Output noise measurement28:57 - Classic Dave GOOF29:57 - USB-A vs USB-C input noise31:37 - Voltage Accuracy test32:11 - Real noise measurements33:08 - MAGIC SMOKE!34:12 - Max 100W load testing35:45 - Overshoot and CV/CC mode change testing37:35 - Conclusion

author: shapirus
author_rank: Super Contributor
timestamp: March 29, 2024, 11:54:50 pm
content: Looks like a perfect second channel for my single-channel lab PSU to power negative rails and whatnot.Nice little thing, indeed, the designers knew what they were doing. Noise figures are impressive, too. Shouldn't be too bad in the EMI department, either....of course this review came just in time, one day after the aliexpress anniversary sale ended, lol. Starts at $52 now. Still good value for the price, I guess.

author: ledtester
author_rank: Super Contributor
timestamp: March 30, 2024, 08:38:58 am
content: There's another thread on this unit here:https://www.eevblog.com/forum/testgear/dp100-mini-power-supply-(0-30v-0-5a)/User Dexter2 discovered spikes on the output when the output is turned off under a light load using USB-C power supplies:https://www.eevblog.com/forum/testgear/dp100-mini-power-supply-(0-30v-0-5a)/msg5418107/#msg5418107It seems there is a footprint for a cap on the pcb to mitigate this issue but it was left unpopulated:https://www.eevblog.com/forum/testgear/dp100-mini-power-supply-(0-30v-0-5a)/msg5420219/#msg5420219

author: DaneLaw
author_rank: Frequent Contributor
timestamp: March 31, 2024, 03:16:55 am
content: The fellow behind the open source "SmartKnob"..- shows the benefit of WebHID and controlling DP100 from a browser.

author: AlundrA
author_rank: Newbie
timestamp: March 31, 2024, 11:45:20 am
content: Can someone explain me how they use a microcontroller to control mp9928 and make a digitally controlled CC/CV power source. I mean how one can set digitally constant current or constant voltage point

author: pamphonica
author_rank: Regular Contributor
timestamp: April 01, 2024, 06:45:22 pm
content: Side question, but where did those dinky binding post to 4mm adapter thingies on pcb come from (at about 30:18), on that power load. I have a near identical load (Matrix PEL-8150) and I am fed up with having to find thick leads with spade-ends to test psus. I do wish that they had used beefy binding posts with 4mm holes.thanks, Jeremy.

author: DaneLaw
author_rank: Frequent Contributor
timestamp: April 01, 2024, 09:58:46 pm
content: Quote from: AlundrA on March 31, 2024, 11:45:20 amPunctual Atom / AlienTek got quite a lot of development details on the chinese forums when I search for it in November....it also looks like they took user input and Q&A some years back when they created DP100. (2022)A good part of these videos have been ported to Youtube, but they are still in Chinese and Chinese CC, so not sure how useful they are, but extensive videos on DP100 & STM32.'https://www.youtube.com/@alientek_official/videosIm not familiar with any programs that can translate videos or spoken language on the fly from YT... though some of the newer AI phones, perhaps could do it?

author: thm_w
author_rank: Super Contributor
timestamp: April 05, 2024, 09:25:52 pm
content: Quote from: AlundrA on March 31, 2024, 11:45:20 amUse the DAC or PWM output on the microcontroller, feed that into the voltage feedback of the DC/DC.For current they might be taking the shunt and also feeding that back to the FB, not sure, you'd have to look at the board.https://electronics.stackexchange.com/questions/640467/is-it-possible-to-control-a-dc-dc-buck-converters-output-voltage-with-the-dac-ohttps://arduino.stackexchange.com/questions/10559/microcontroller-controlled-power-supplyhttps://electronics.stackexchange.com/questions/39107/can-i-use-a-microcontroller-to-control-the-output-voltage-of-a-switching-powersuhttps://www.naun.org/main/NAUN/circuitssystemssignal/2021/a442005-022(2021).pdf

author: AG6QR
author_rank: Frequent Contributor
timestamp: May 21, 2024, 05:24:38 pm
content: I'm a bit late to the party, but I just got mine. This thing is tiny! Here it is almost covered by Metro card (same size as a standard credit card, no numbers to steal).Here's a picture of it paired with a Nomad 35W USB C charger, to power a resistor in the smallest variable bench power supply with adjustable current and voltage limits that I've yet seen.FYI, that slim Nomad adapter is available in 35W and 65W versions from nomadgoods.com. It supplies 20V to the DP100.I'm still not sure exactly why I need such a tiny power supply, but I'll think of something to use it for.

author: Brumby
author_rank: Unknown
timestamp: May 22, 2024, 02:36:14 am
content: Quote from: AG6QR on May 21, 2024, 05:24:38 pmYousobelong here on the EEVBlog forum.

author: LinuxHata
author_rank: Frequent Contributor
timestamp: July 22, 2024, 08:57:03 pm
content: I've got this back in 2023 when it was released, and it was working fine, but today it busted in flames (literally!)This happened, when I had output voltage was set to 20V, current to 3A and connected just 1000uf capacitor.The power supply restarted and fire went out from the side.I quickly disconnected and found out that two parts are completely burnt. Most likely these are MOSFETs for synchronous rectifier.Now power supply works - it boots and display is on, but there is no output at all.Anyone knows p/n of these mosfets, so I can replace them?