Author Topic: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]  (Read 23829 times)

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Online Phil1977

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #25 on: April 02, 2024, 01:13:41 pm »
Wow, thanks for the 5A-type, I was not aware of this high-current-version.

By chance I have a few of the standard 2A-versions of the same form factor laying around, so as soon as I receive my DP100 I´ll check out if there is some available space for this.

And yeah, it definitely will be more of something improvised than some clean PCB construction. But at least in my habitat such devices often have the longest life  :palm:
 

Online MegaVolt

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #26 on: April 04, 2024, 12:34:35 pm »
Perhaps it would be easier to switch the output with a solid-state opto-relay?
 

Online Phil1977

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #27 on: April 04, 2024, 01:54:20 pm »
Perhaps it would be easier to switch the output with a solid-state opto-relay?

Inside these relais there is either a TRIAC (high Uf and unsuitable for DC) or MOSFET (usually unipolar, usually with a minimum switch voltage or additional supply voltage)

5A-versions are quite large and may require a heatsink.

From my point of view you can either
- directly use a high-side- FET with low RDSon, or
- use a compact mechanical relais, or
- use an additional isolated DC-DC module in the input.

I have some positive experiences with the following (extremely cheap) boards:

2097320-0

https://de.aliexpress.com/item/1005006462467909.html
(not assosiciated anyhow with the seller...)
 

Online Phil1977

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #28 on: April 15, 2024, 10:04:55 am »
Just received my own unit: It´s a really nice toy and tool for mobile setups! Build quality and first impressions on DC-noise are absolutely positive.

Regarding the Low-Side-Switch-problem: I´ve checked the available space and as already mentioned in this thread there would be some space for a miniature relais. I think the problem of disconnecting the output pole could also be solved by some kapton tape on the PCB, a nylon-screw for fixing of the +jack and soldering a wire directly to the gold plated backside of the jack.

But:
- The power supply uses this low side switch for quick load disconnection, but the buck converter is also disabled in the off-state. The only energy that could flow over a parasitic ground connection could be the charge of the caps and the noise mentioned in the beginning of the thread.
- The current-sensing is also in the low side of the buck converter. This means, a parasitic ground connection heavily distorts current measurement and regulation. Neither the relais nor the high-side FET could improve that behaviour.

Conclusively I will use this thing on a power bank or use an isolated DC-DC in its supply. Else it´s not well suited for any lab-setup with common-ground DC supply.

Last but not least, this behaviour is even quite directly mentioned in the manual - but who the f... ever reads the manual of a power supply except in case of extreme procrastination   ::)
 

Offline Dexter2

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #29 on: April 25, 2024, 04:23:06 pm »
I have received the DP100 PFET update PCB i designed a few days back and as promised below short update instructions and Gerber files if someone else wants to update this power supply.

First the measurement. The output switches now ON-OFF in about the same time with no load attached now. There is no coupled noise on the output anymore. It now performs as it should...



Upgrade procedure:
  • Disassemble the unit
  • Remove N-ch MOSFET, TVS, Fuse, LED, LED resistor and clean all pads from exes solder to get a nice flat surface, also clean the solder from TH capacitor pins
  • Apply some capton tape the the back of the PCB (solder stop is not a guarantied insulator)
  • Place the PCB to DP100 PCB and position with output terminal screws, and after that solder the PCB to the TH capacitor pins
  • On the top part of PCB mount the TVS and a 100nF capacitor
  • Connect the 5V and Enable wire
  • Put everything back together









I also tested the thermal performance with shorted output at 5A (worst case scenario for P-FET). And it works perfect and its also dead cool. You could use a 10 or even 20mohm lower performance part...




I have 3 spare unpopulated PCBs so if someone needs i can send them out for free.











« Last Edit: April 25, 2024, 04:46:58 pm by Dexter2 »
 
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Online Phil1977

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #30 on: April 26, 2024, 12:21:54 pm »
Fantastic mod and great results!

It´d be great if the manufacturer would have spent these additional cents.

But anyhow, even with the mod the PS can't be flawlessly used in any common ground setup - now just due to the current sensing on the low side. It´s fantastic that you offer the mod boards, but I´ll stay with the additional galvanic isolator in the back of the bench.
 

Offline zambetti

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #31 on: April 30, 2024, 02:50:30 pm »
This thread has been great reading.

For anyone who has two DP100, do you know if it is possible/safe to chain them for positive and negative voltages?

 

Offline zambetti

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #32 on: April 30, 2024, 03:41:37 pm »
update instructions and Gerber files if someone else wants to update this power supply.

This mod looks so clean. Beautiful work.

I am considering giving it a shot.

Reading your schematic, I have this list of components that must be bought...

• M1 : Toshiba XPH4R714MC,L1XHQ
• U1 : TI LM2776DBVT (SOT-23-6)
• M2 : OnSemi 2N7002
• C1, C2, C3, R2, R1

Do you have a recommended part number for ZD1?
 

Offline DaneLawTopic starter

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #33 on: April 30, 2024, 07:47:10 pm »
This thread has been great reading.
For anyone who has two DP100, do you know if it is possible/safe to chain them for positive and negative voltages?

Dont know, but I would love to hear any feedback/progress on how tolerable a couple of DP100 are when chaining them up in different configurations (neg, volt, amp)
Will also give it a shot again and report back.. tested it briefly when I got my two units, and encountered some issues to the point, that I backed out..
« Last Edit: April 30, 2024, 07:57:50 pm by DaneLaw »
 

Offline electr_peter

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #34 on: April 30, 2024, 08:01:41 pm »
DP100 manual states:
Quote
Support multiple (<=3) devices in series to achieve higher voltage output or positive negative voltage output.
So series connection is possibly in theory (with independent floating supplies like battery banks). I do not have 2 units to test it in practice.
 
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Offline zambetti

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #35 on: May 02, 2024, 08:40:43 am »
DP100 manual states:
Quote
with independent floating supplies like battery banks

Why would chaining two DP100 require that they are each powered by a separate battery bank?

Could they be damaged by chaining them when they are both powered by the same USB-C supply?
Or by separate DC power supplies?
 

Offline electr_peter

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #36 on: May 02, 2024, 03:03:24 pm »
Why would chaining two DP100 require that they are each powered by a separate battery bank?
Could they be damaged by chaining them when they are both powered by the same USB-C supply?
Or by separate DC power supplies?
DP100 are not isolated PSUs, these cannot be connected in series if powered from the same source.
With different supplies it should work, regular considerations for series connection apply.
 
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Online Phil1977

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #37 on: May 14, 2024, 08:41:32 am »

DP100 are not isolated PSUs, these cannot be connected in series if powered from the same source.
With different supplies it should work, regular considerations for series connection apply.

Please also pay attention to the Current measurement on the "-"output of the DP100. If you connect more than one DP100 without galvanic isolation or if you even just use one DP100 e.g. on a 24V-powered DC system then you must not connect the circuitry on the DP100 anywhere with the rest of the system. Not even just by a data cable with ground connection or shielding! If you do anyhow you have no indication or regulation of the flowing current.

I´d always recomment to either use
- galvanically isolated lab PSUs, or
- common ground lab PSUs

That´s both not possible with the DP100 without an additional isolating converter.
 

Offline confusion

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #38 on: June 01, 2024, 02:22:10 pm »
Sorry to hijack the thread but I wanted power my DP100 unit using 28v from a powerbank. Ugreen PD 140W
The powerbank is listed as having PD3.1 (Do you need PD3.1 for 28v?)
https://www.aliexpress.com/item/1005005654971205.html?spm=a2g0o.order_list.order_list_main.46.21ef18027neftP


The advertising material is contradictory. In the listing it says:
USB-C1 output: 5V=3A 9V=3A12V=3A 15V=3A 20V=5A 28V=5A

However in the pictures it says it only goes up to 20v

I was intending to decoy the powerbank to deliver 28v by using another Alientek product I own, the UT70 usb tester. https://www.aliexpress.com/item/1005006116220488.html?spm=a2g0o.order_list.order_list_main.261.26d318027lkAB4

So it's a bit confusing as to whether or not the powerbank can even deliver 28v and if I'll damage it in some way if I try.

Any help would be much appreciated. Cheers.

PS: The DP100 came with a female DC barrel jack to usb c cable. Am I correct in assuming the barrel jack is 5.5mm x 2.1mm ID? Or is it 5.5mm x 2.5 ID?
I was wondering if I could use this decoy board in place of the UT70.
https://www.aliexpress.com/item/1005005397916454.html?spm=a2g0o.productlist.main.9.61e37894qRCE67&algo_pvid=5ae51f20-0d9a-46ad-be54-fbf1ebbc8351&algo_exp_id=5ae51f20-0d9a-46ad-be54-fbf1ebbc8351-4&pdp_npi=4%40dis%21AUD%213.84%212.88%21%21%212.51%211.88%21%402101effb17172477897311871e7683%2112000032900047201%21sea%21AU%21724890917%21&curPageLogUid=f7SdzNhm8WHo&utparam-url=scene%3Asearch%7Cquery_from%3A

I can't work out how to set the voltage on it
and what is emark?
 

Offline DaneLawTopic starter

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #39 on: June 01, 2024, 08:00:56 pm »
PD3.1 works fine with DP100 when used with a trigger..
It has nothing to do with the DP100, as that unit cannot handshake for any higher than 20V/5A_100W (PD3.0) and below, including. Qualcomm's quick charge protocols.

If you wanna use PD3.1 28V/5A_140W then you need a PD3.1 trigger and if your PD3.1 trigger ain't directly attached to the PD3.1 source (powerbank/PSU), you will also need a cable with a corresponding chip, that allows for PD3.1 voltage & current between the PD3.1 powersource and the trigger before PD3.1 units deliver/opens up for that higher voltage, so you don't risk dumping that power/voltage into a normal TypeC-cable that can't say no, and wont have the strains to carry that momentum.

You can't damage the power bank, as either it got PD3.1 or it don't.. What you can damage are items AFTER the trigger, as they will be stop-fed the triggered voltage, and don't have any saying in the equation, that includes. cables, devices down the chain.. and it's 100% up the end-user that are using these crude PD triggers to make sure that anything after the trigger can handle that triggered voltage/current.

So on the DP100' when you run it from a PD3.1 source - your not using PD handshakes at all.. DP100 will just see it as a crude 28v DC 2p power line.
 

Offline confusion

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #40 on: June 02, 2024, 02:45:35 am »
PD3.1 works fine with DP100 when used with a trigger..
It has nothing to do with the DP100, as that unit cannot handshake for any higher than 20V/5A_100W (PD3.0) and below, including. Qualcomm's quick charge protocols.

OK, understood.


If you wanna use PD3.1 28V/5A_140W then you need a PD3.1 trigger and if your PD3.1 trigger ain't directly attached to the PD3.1 source (powerbank/PSU), you will also need a cable with a corresponding chip, that allows for PD3.1 voltage & current between the PD3.1 powersource and the trigger before PD3.1 units deliver/opens up for that higher voltage, so you don't risk dumping that power/voltage into a normal TypeC-cable that can't say no, and wont have the strains to carry that momentum.


I was always under the assumption that DC cables were, within reason, interchangeable insofar as the current doesn't exceed the maximum rating. A 20v5A cable running at 28v/5A would seem fine? Is this incorrect?


You can't damage the power bank, as either it got PD3.1 or it don't.. What you can damage are items AFTER the trigger, as they will be stop-fed the triggered voltage, and don't have any saying in the equation, that includes. cables, devices down the chain.. and it's 100% up the end-user that are using these crude PD triggers to make sure that anything after the trigger can handle that triggered voltage/current.

So on the DP100' when you run it from a PD3.1 source - your not using PD handshakes at all.. DP100 will just see it as a crude 28v DC 2p power line.

That makes sense. The PD trigger is just requesting 28v.

After posting last night I stumbled upon this unit which seems to be a cable with a trigger built into it, which seems neater, safer and quicker to use than the other unit I was suggesting earlier. There's even a comment down the bottom about someone using it on their DP100.

https://www.aliexpress.com/item/1005006131442992.html?spm=a2g0o.cart.0.0.667b38dacIZyID&mp=1

However, what you were suggesting earlier might mean that the DC barrel plug to USB-C adapter that came with the DP100 might not be appropriate for 28v and I can't seem to find a unit like this that is male C to male C. Which I don't really like the idea of anyway because I might accidentally use it on a device that doesn't appreciate it.

Thanks heaps for the help

edit: I'm now thinking the DP100 will never ask for more than 100w (28v/3.57A) so as long as the barrel plug to USB-C adapter is good for 28v. I should be alright, right?
« Last Edit: June 02, 2024, 04:41:15 am by confusion »
 

Offline Purvirs

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #41 on: June 02, 2024, 09:14:20 am »
The RuiDeng units, It's another fish, nobody would pursue Atomics DP100 or Miniware MDP-series, for PSU purposes, if size benefits weren't critical, then you would go with a full fledge bench PSU, if mobility & size weren't a crucial factor.

Sure' you can get a Ruideng control PSU panel for relatively small funds, but its two very different-sized products in build and design, the DP100 its tiny, to the point that many would see that tinyness as a con, if the tiny size wasn't something they needed.
Here in my taxed northern region, RuiDengs RDxxxx products are from. 130USD for what looks to be a barebone RD6012 frontboard (no wifi) and up, incl. enclosure-backcase it's 170 to 180USD and then you can add a PSU.. https://aliexpress.com/item/1005003472332331.html?

Already have two linear Korads-P units http://tinyurl.com/28upwfre and they are bulky as, (just like linear PSUs tend to be for the linear benefits) and certainly not mobile, and it's the small form factor in fx DP100 that is so easy to just pull out on your desk or outside, and attach with a high wattage power bank, that appeals to me, not least to running high powered 9mm laser diodes, as im fascinated by light, and particularly coherent wavelengths, where many of the high power lazing diodes nowadays are quite resistant to switching PSUs.

DP100 48 USD (incl. 25% EU-VAT and delivery) but it is a sale price (BF/SD sale) where Aliexpress eats a good chunk of the price & takes it down a nudge http://tinyurl.com/mupskyju

Been very close to take the plunge on the Miniware variant since it came out "MDP-X" fx 905 but the more I looked into it, the more limited it seemed hence the choices Miniware had gone with, though Miniware did try to counter some of the shortcomings with later revisions, not least protocols.
The fanless MDP P905 (90W) which in the standalone version costs around (160USD) though P905 discontinued now, for a beefier variant P906 (220USD / Eleshop) which is now also holding a tiny hysteric fan (not dat creazy about that) likely a must in such a small form factor, being able to reach 10A.

I'm not familiar with other alternatives, then the Miniware MDP PXXX variant and then the DP100 from Punctual Atomic, all other units seem to be in another adj. PSU category, also RuiDeng units.

So far I do like the protocol approach in the DP100, as you have quite big control over the power delivery/PD and Qualcomm protocols when supplying power.
PD (to a type C PD socket) you can cycle at will in the DP100 menu, 9v, 12v, 15v, 20v, and your power bank or PSU will adjust accordingly on the fly.
Qualcomm quick charge (when using power from a standard USB-A port) you can cycle between 9v and 12v.

Tried with an Anker737 power bank (PowerCore24). it got 2x TypeC (PD3.1) and 1 USB-A (QC support).. the 2 TypeC sockets would cycle 9v, 15v, 20v (this 737model PB doesn't support 12v PD) and running it from the USB-A port would let me choose between 9v and 12v (QC)

You can always just supply ordinary non-protocol power, to get above 20v, as the unit doesn't support PD3.1 which opens up for fx 28v/5A (140W) DP100 got PD3.0 as far as I can tell, that maxes out at 5A 20v (100w)
The Anker737 power bank supports PD3.1 and 140watt of each of the 2x TypeC sockets, so I attached a PD3.1 28V 5A decoy/trigger cable, so the power bank triggers 28v-power delivery out (PD), and that works fine, gives you 28v input on the DP100, - the DP100 is solely buck'ed, so your max will be around 1v lower than your input.

If you dont wanna rely on protocols, you can obviously also do that, fx from a barrel DC, as it comes with a DC-barrel to TypeC adapter that does seem quite beefy hence the metal in the small cable part, likely rated for the 100W.



Tested to see if it overshooted and to what extent...tested when turning the device on & off, and tested when turning the output on & off..
could look like there is some when turning the output off (peaks with +0.4v from 15v output, a brief spike to 15.4v before dropping), and when turning the DP100 on manually with the left button, the same spikes with around +0.4v to 0.400mv before centering. (not the actual output, solely the device on) but there are quite many variables, as you can also set it to turn on aut when connecting the power bank (was using the 737 Powercore24)...

Will try to hook one of these on the input from the power bank to see what it gets in.



I've seen the reviews and the teardown of the DP100, P906 and Ruiden PSUs, if really need to choose a good PSU, would suggest P906, the reason is listed below:
1. DP100 is a step-down only power supply, the max output voltage is limited to the input DC voltage, so if on site your DC source supply for DP100 is somehow below what you want, you wouldn't get the voltage stage you want; since it's a pure SMPS, to some noise sensitive application, you need to consider the output noise from DP100;
2. Duiden is actually one of the power conversion 'panels' in the market, it's using a standard power brick inside,  the panel utself is just a step-down SMPS, display and control, if you are looking for maximum wats per dollar, that will be the choice, and in the market, some other DIY type PSUs using retired Server Power Supplies, which are even cheaper, but same as the DP100, the switching noise cannot be ignored.
3. MDP-P906, this one is different from the above, it has a 4-switch buck-booster inside, so you are not limited to the input volage, the fan is prepared for the full power 300W, in normal use you won't really hear the fan noise; the other different part is the output stage of P906, it has a program controlled low drop linear regulator, comparing with the above two, the output is much cleaner, also the building quality is much better than the above, CNC anodized case/shell, leaser engraved markings; that's why it's much expensive than the DP100 and Ruiden, another downside for MDP PSU is it's PC controllbility, it currently doesn't provide a PC or phone app for the control of the PSU, which is nor as good as the other two.




 

Offline DaneLawTopic starter

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #42 on: June 02, 2024, 02:47:23 pm »
----
I've seen the reviews and the teardown of the DP100, P906 and Ruiden PSUs, if really need to choose a good PSU, would suggest P906, the reason is listed below:
1. DP100 is a step-down only power supply, the max output voltage is limited to the input DC voltage, so if on site your DC source supply for DP100 is somehow below what you want, you wouldn't get the voltage stage you want; since it's a pure SMPS, to some noise sensitive application, you need to consider the output noise from DP100;
2. Duiden is actually one of the power conversion 'panels' in the market, it's using a standard power brick inside,  the panel utself is just a step-down SMPS, display and control, if you are looking for maximum wats per dollar, that will be the choice, and in the market, some other DIY type PSUs using retired Server Power Supplies, which are even cheaper, but same as the DP100, the switching noise cannot be ignored.
3. MDP-P906, this one is different from the above, it has a 4-switch buck-booster inside, so you are not limited to the input volage, the fan is prepared for the full power 300W, in normal use you won't really hear the fan noise; the other different part is the output stage of P906, it has a program controlled low drop linear regulator, comparing with the above two, the output is much cleaner, also the building quality is much better than the above, CNC anodized case/shell, leaser engraved markings; that's why it's much expensive than the DP100 and Ruiden, another downside for MDP PSU is it's PC controllbility, it currently doesn't provide a PC or phone app for the control of the PSU, which is nor as good as the other two.

You sound like you're literally trying to convince yourself.. alongside having very little insight into this specific item and you clearly haven't spent a moment just reading this thread,  in regards to the product you are making conclusive comments on, with faulty conclusions left & right, even though you try to highlight the opposite in the first sentence.

Im not interested in a boost-based SMPS flooded in caps with a noisy fan, that is massively overpriced and literally do pop-goes-the-weasel to release the infamous magic smoke when tested.
 = 10:18 https://youtu.be/6yhlmqRFz4Y?si=rlq9ezRIfZHgW16_&t=562
You can read the comments on the posted YT vid above' about all the users that got the same issues, but also other problems where they lose their accuracy and the voltage reading got a huge offset on numerous volts.

actually I have a set of this gear, a MDP-M01, the console; two P906s and an L1060.

I don't know if you paid for all these items, or if you'r one of those hundred or thousands of people that Miniware is sending all their items free of charge in exchange for influencing on social media, but all that greasing ain't cheap for a company of that size, and needs to be picked up by some, if so it's quite an investment you have made, so I hope it worked out for you.
 
Wouldnt be supprised that Punctual Atomic /AlienTek likely been inspired by Miniware's DP905 (buck) & their P906 (Buck/Boost) when making the DP100.
Have over the years followed along on Tommy's stacking approach with his MDP-line from 2018/19 with a mix-match of various plugs over the years and the UI on the XP interface-console-module, could use some TLC.
I purchased a few items from Miniware over the years. * Damaskus Scraber, * MHP30 (heating plate) * DS212 (2ch scope with a crude sig-gen)  its a mixed bag, not least with the price in mind..
- Sure the DS212 its well-built, extremely thin in an alucasing and looks great but it's a pain to use and was never updated, even though A lot of promises.. It seems all focus are on making new models and don't look back - with all efforts into design and very little into the UI, and the actual use-case.
That's the case with many of Miniware products, its a Design studio and I reckon it shows, but if you are happy with all your MDP-items, then that is what matters, no reason that other items should make you less "so happy" about your own products.

Sofar I been quite impressed with these DP100 and the ablelity to smack a cheap powerbank into it, also like that it comes with a nice casing to store it and the ablelity to control remotely and you have the standard wideness between the two 4mm terminals, so you can use 4mm-to-BNC adapters.
« Last Edit: June 02, 2024, 04:20:39 pm by DaneLaw »
 

Offline ElectricMarco

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #43 on: June 03, 2024, 10:06:32 am »
Hi everyone,
just read the posts and I really want to buy a DP100.
Does someone from the germany has a good aliexpress link?
The official Alientek store is not shipping to germany and the other sellers have only a couple sold devices.
Thanks for all information and for the good informations about the DP100.
 

Offline Purvirs

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Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #44 on: June 03, 2024, 10:46:41 am »
----
I've seen the reviews and the teardown of the DP100, P906 and Ruiden PSUs, if really need to choose a good PSU, would suggest P906, the reason is listed below:
1. DP100 is a step-down only power supply, the max output voltage is limited to the input DC voltage, so if on site your DC source supply for DP100 is somehow below what you want, you wouldn't get the voltage stage you want; since it's a pure SMPS, to some noise sensitive application, you need to consider the output noise from DP100;
2. Duiden is actually one of the power conversion 'panels' in the market, it's using a standard power brick inside,  the panel utself is just a step-down SMPS, display and control, if you are looking for maximum wats per dollar, that will be the choice, and in the market, some other DIY type PSUs using retired Server Power Supplies, which are even cheaper, but same as the DP100, the switching noise cannot be ignored.
3. MDP-P906, this one is different from the above, it has a 4-switch buck-booster inside, so you are not limited to the input volage, the fan is prepared for the full power 300W, in normal use you won't really hear the fan noise; the other different part is the output stage of P906, it has a program controlled low drop linear regulator, comparing with the above two, the output is much cleaner, also the building quality is much better than the above, CNC anodized case/shell, leaser engraved markings; that's why it's much expensive than the DP100 and Ruiden, another downside for MDP PSU is it's PC controllbility, it currently doesn't provide a PC or phone app for the control of the PSU, which is nor as good as the other two.

You sound like you're literally trying to convince yourself.. alongside having very little insight into this specific item and you clearly haven't spent a moment just reading this thread,  in regards to the product you are making conclusive comments on, with faulty conclusions left & right, even though you try to highlight the opposite in the first sentence.

Im not interested in a boost-based SMPS flooded in caps with a noisy fan, that is massively overpriced and literally do pop-goes-the-weasel to release the infamous magic smoke when tested.
 = 10:18 https://youtu.be/6yhlmqRFz4Y?si=rlq9ezRIfZHgW16_&t=562
You can read the comments on the posted YT vid above' about all the users that got the same issues, but also other problems where they lose their accuracy and the voltage reading got a huge offset on numerous volts.

actually I have a set of this gear, a MDP-M01, the console; two P906s and an L1060.

I don't know if you paid for all these items, or if you'r one of those hundred or thousands of people that Miniware is sending all their items free of charge in exchange for influencing on social media, but all that greasing ain't cheap for a company of that size, and needs to be picked up by some, if so it's quite an investment you have made, so I hope it worked out for you.
 
Wouldnt be supprised that Punctual Atomic /AlienTek likely been inspired by Miniware's DP905 (buck) & their P906 (Buck/Boost) when making the DP100.
Have over the years followed along on Tommy's stacking approach with his MDP-line from 2018/19 with a mix-match of various plugs over the years and the UI on the XP interface-console-module, could use some TLC.
I purchased a few items from Miniware over the years. * Damaskus Scraber, * MHP30 (heating plate) * DS212 (2ch scope with a crude sig-gen)  its a mixed bag, not least with the price in mind..
- Sure the DS212 its well-built, extremely thin in an alucasing and looks great but it's a pain to use and was never updated, even though A lot of promises.. It seems all focus are on making new models and don't look back - with all efforts into design and very little into the UI, and the actual use-case.
That's the case with many of Miniware products, its a Design studio and I reckon it shows, but if you are happy with all your MDP-items, then that is what matters, no reason that other items should make you less "so happy" about your own products.

Sofar I been quite impressed with these DP100 and the ablelity to smack a cheap powerbank into it, also like that it comes with a nice casing to store it and the ablelity to control remotely and you have the standard wideness between the two 4mm terminals, so you can use 4mm-to-BNC adapters.




haha, my bad that I didn't go through this thread thoroughly, I though it was purely discussing about this specific power supply unit, as mentioned in the thread, the voltage cut off when disable the supply, this issue seems presented on all of this kind of portable PSUs, including P906. The modifications discussed above to improve the output shutdown characteristics are indeed instructive.
for me, personally, I need a PSU can do 24V (this is my main working voltage platform) output with a normal PD adapter, and take as less space as possible. last year when I tried to choose a portable PSU, I did evaluate DP100 and other PSUs, but due to the limitation mention above, DP100 is hard to accept.
the performance comparision for this type of PSUs can be found here, it compared the Ruiden and MDP system, and the comments below that revealed the topology difference and why (Sorry it's in Chinese)
https://www.bilibili.com/video/BV1EY4y1W7C1/?spm_id_from=333.337.search-card.all.click&vd_source=c47fe10e9121852849e685d12b947cbc
the link below is the teardown and analysis of DP100, for reference if someone need it:
https://www.bilibili.com/video/BV1hZ4y1v768/?spm_id_from=333.337.search-card.all.click&vd_source=c47fe10e9121852849e685d12b947cbc

then I kept looking, finnally found the MDP system can suit my need, then I bought the whole kit, even though it costed me around 3.5k RMB, but luckly it solved my problem.
I don't have hard feeling on Punctual Atom, as I used to buy a lot of MCU developing/evaluation boards from them, and they did help me a lot to understand how to do embedded coding. however things start to change a few years ago, Punctual Atom started to release a lot of dev tools which looks quite strange, like the USB-C soldering iron, iron station, logic analyser, USB meter... and the prototypes of these products can be easily found in the market, they seem to have lost their original intention, we understand that profitability is very important for a commercial company, but on Xianyu (a second-hand e-platform in China),  Punctual Atom's product are on the top pages of these dev tools searching result, far more than the other competitors, seems so many people want to sell them due to some reasons... there are so many ads of Punctual Atom in the social media, they use very misleading slogans, so if you don’t look closely, you will think that their tools can do anything, such as this DP100....

Sorry for going off topic. you are right Miniware did promise a lot, and rarely to deliver. the reason why I replied this thread was the first post caught me and I feel interested, Lol.... not trying to influence anyones purchasing decisions.

It's a pleasure to discuss together, cheers

 

Offline soopahfly

  • Newbie
  • Posts: 1
  • Country: gb
Re: DP100 PD-Power Supply 100Watt [0-30.00V / 0-5.000A) [∼50$]
« Reply #45 on: July 12, 2024, 09:47:12 am »
I'd love to give this mod a go, is there anywhere I can buy the bits from?

Thanks!
 


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