Hey Kerry, the OVP indicator on the display was GREEN the first time until triggered, and was still RED the second time you applied power, indicating it is inactive. Another excellent KW review. I enjoyed your change in delivery tone 20:50 " What⁉" when you discovered the protection was disabled. 😯 The user manual does not state how to restore OVP. I agree with you that the software is incorrectly programmed for absolute user protection. Firmware update is not available when I checked. I think FNIRSI should be quicker about implementing fixes across their devices, especially if they are inadvertently using influencers for beta testing. For the price, I wish they supplied a high voltage PD source. Otherwise, they should just call their product a DC-DC converter. It's not a power supply in the classic sense.
When I reviewed this same unit a few weeks ago the over voltage and over current limits were working for me even with repeated attempts, I don’t remember what firmware version mine was. It is funny how our reviews ended up being so similar, but we both covered what needed to be tested.
Hi Kerry, I find your review one of the best I have ever seen on UA-cam! You are obviously experienced in electronics. My background is from condensed matter physics. I found that there is a software upgrade to version 1.6 for this unit. It would be fantastic if you could do a future video of upgrading this? Thanks for the great work, Ken
@@KerryWongBlog I am going to have a more in-depth look into it myself as well. I just have to find the time also. I am also having a problem running the unit on a battery pack that is supposed to be able to supply 28 volts 5 amps. It seems that the software is limiting the input 20 volts 5 amps only? That's why I was looking for a software upgrade as well. Keep up the Fantastic work!
Just tested my unit with version 1.1 firmware. It agrees exactly with your tests. My overcurrent settings are ignored on the second try too. There is a red OCP warning in the PC software next to the "Open" button. Great review!
I have professional power supplies that require a manual reset, or turning the unit off and back on. However, they do not supply power until that process is completed.
@@pault6533 Also how this unit indicates it in its manual. DPS150 manual in RED-highlight = ※When any status other than normal is detected, the device automatically shuts off the output and emits a beep alarm. Output is prohibited under undervoltage protection status.// - or maybe they just highlight, that the user shouldn't use the device if the "RED" symbol alarm is shown. Though you can clean/reset, the RED alarm so it changes to GREEN, by simply clicking one of the front buttons, and it will again trigger the "protection" ao its active and GREEN, but the end user needs to do it.
I think the over voltage and over current protection is more so a "User error prevention" system. When you change the voltage or the current live it most likely would react.
It appears there may have been voltage present at zero setting due to an internal capacitor across the output terminals. An internal capacitor across the output terminals could also explain the instability at low output currents. I have seen similar behavior on expensive bench supply with an $800 price tag. If the Fnirsi power supply had buck/boost function, it probably would have been a much larger volume to accommodate a big inductor or switched capacitors as voltage multiplier.
An open switch is off, and a close one is on. It is actually logical having the switch concept in mind. Also I have another power supply which can be also powered by both barrel and usb-c and there is no need for a switch to select either one. I suppose the function of the slide switch behind it is indeed that of powering on and off the device.
I bought one of these and also a PD 3.1 Anker 140W (port C1) charger. I had hopes that it would activate 28V/5A trigger to provide over 20V. Unfortunately, the maximum voltage through USB Type-C seems to be 20V. Can you confirm this? It seems the only way to get the full power capability of this device is through the DC jack.
I experienced a similar thing with a battery pack. It said it was capable of supplying 28 volts at 5 amps, but was limited to 20 volts 5 amps. I suspect that this was because the software in the power supply was not up-to-date? I see there's a firmware upgrade to version 1.6 not sure if anybody has tried this?
@@pault6533 Well unfortunately that's very disappointing. You think that they would have made a really nice product like this, more versatile. But that's inexperienced design engineers for you...
@ it may also be the safer way to go. I have found PD3.1 is not perfect, partly because of being new and not widely supported. That may be what the engineer s realized when this product was released. By not getting on the new standard, they were able to avoid potential usability issues.
Very in-depth review of the low cost DC 30V 5A. Interesting PCB. I question the durability of the capacitors and copper coil, but could be OK for low voltage and milliamps. 📱💻
interesting little thing with very affordable price. it reminds me in something similar from miniware but there with much higher price. i think it is relatively new so no long time experience is available. are there alternatives out there comparable in size and function?
Hi Guys !! Would you recommend this one or BSIDE i83010 ( at 30V/10A/300W cheaper version of the i84020 unit you tester few months ago). The portability and size is not important to me. 5 extra amps and 150 extra watts are also not important to me. Which one would you reccomend based on build quality and performance ? Thanks!
Judging by the inductor design this does not appear to be an isolated power supply. People need to be careful if using more than one of these (for example, to create a positive and a negative voltage) as there are certain situations where a short circuit and potential internal damage will occur (if they are both sharing the same power source or they are both connected to USB). Good lab power supplies are always isolated.
@ I believe you may be correct. I have a feeling that comments here prodded Zotek to fix some problems with the Zoyi ZT-703S Oscilloscope Multimeter combo. It is a much better product after the firmware improvements.
I have been waiting for my unit to arrive, but it was "lost in customs". The tracking info never changed from the drop ship USPS invoice they made. I had to file a claim with Paypal because FNIRSI wouldn't respond to my refund request. Neat unit, awful company.
Amazing power supply! The portability and versatility are incredible. You can bring 150 watts of power to anything in the palm of your hand.
Hey Kerry, the OVP indicator on the display was GREEN the first time until triggered, and was still RED the second time you applied power, indicating it is inactive. Another excellent KW review. I enjoyed your change in delivery tone 20:50 " What⁉" when you discovered the protection was disabled. 😯 The user manual does not state how to restore OVP. I agree with you that the software is incorrectly programmed for absolute user protection. Firmware update is not available when I checked. I think FNIRSI should be quicker about implementing fixes across their devices, especially if they are inadvertently using influencers for beta testing. For the price, I wish they supplied a high voltage PD source. Otherwise, they should just call their product a DC-DC converter. It's not a power supply in the classic sense.
When I reviewed this same unit a few weeks ago the over voltage and over current limits were working for me even with repeated attempts, I don’t remember what firmware version mine was. It is funny how our reviews ended up being so similar, but we both covered what needed to be tested.
I just watched your review. The interesting thing is that your firmware version is the same as mine.
Should do a comparison to AlienTek DP100. Great review, thank you.
If OCP or OVP (red) lights up, simply press “home” twice until “OK” (green) appears again.
The protection will then work again.
Well that’s useful information! Thanks!
Great video as usual. Professional, unbiased and informative. Thank you.🙏
Hi Kerry,
I find your review one of the best I have ever seen on UA-cam!
You are obviously experienced in electronics. My background is from condensed matter physics.
I found that there is a software upgrade to version 1.6 for this unit.
It would be fantastic if you could do a future video of upgrading this?
Thanks for the great work,
Ken
Thanks! I will check it out when I get a chance.
@@KerryWongBlog
I am going to have a more in-depth look into it myself as well.
I just have to find the time also.
I am also having a problem running the unit on a battery pack that is supposed to be able to supply 28 volts 5 amps.
It seems that the software is limiting the input 20 volts 5 amps only?
That's why I was looking for a software upgrade as well.
Keep up the Fantastic work!
You do great product reviews
Just tested my unit with version 1.1 firmware. It agrees exactly with your tests. My overcurrent settings are ignored on the second try too. There is a red OCP warning in the PC software next to the "Open" button. Great review!
I have professional power supplies that require a manual reset, or turning the unit off and back on. However, they do not supply power until that process is completed.
@@pault6533 Also how this unit indicates it in its manual.
DPS150 manual in RED-highlight
= ※When any status other than normal is detected, the device automatically shuts off the output
and emits a beep alarm. Output is prohibited under undervoltage protection status.//
- or maybe they just highlight, that the user shouldn't use the device if the "RED" symbol alarm is shown.
Though you can clean/reset, the RED alarm so it changes to GREEN, by simply clicking one of the front buttons, and it will again trigger the "protection" ao its active and GREEN, but the end user needs to do it.
Thank you for a very informative review
As usual, well done Kerry! I would mount a small cooler with a thermal sensor there, in case of prolonged use of the converter.
I think the over voltage and over current protection is more so a "User error prevention" system. When you change the voltage or the current live it most likely would react.
It appears there may have been voltage present at zero setting due to an internal capacitor across the output terminals. An internal capacitor across the output terminals could also explain the instability at low output currents. I have seen similar behavior on expensive bench supply with an $800 price tag.
If the Fnirsi power supply had buck/boost function, it probably would have been a much larger volume to accommodate a big inductor or switched capacitors as voltage multiplier.
An open switch is off, and a close one is on. It is actually logical having the switch concept in mind.
Also I have another power supply which can be also powered by both barrel and usb-c and there is no need for a switch to select either one. I suppose the function of the slide switch behind it is indeed that of powering on and off the device.
I bought one of these and also a PD 3.1 Anker 140W (port C1) charger. I had hopes that it would activate 28V/5A trigger to provide over 20V. Unfortunately, the maximum voltage through USB Type-C seems to be 20V. Can you confirm this? It seems the only way to get the full power capability of this device is through the DC jack.
FNIRSI confirmed the USB port uses 3.0 interface and has a maximum trigger 20V.
I experienced a similar thing with a battery pack. It said it was capable of supplying 28 volts at 5 amps, but was limited to 20 volts 5 amps. I suspect that this was because the software in the power supply was not up-to-date?
I see there's a firmware upgrade to version 1.6 not sure if anybody has tried this?
@ FNIRSI said its hardware restricted to PD 3.0 which is 20V max handshaking. No firmware update can give us 28V.
@@pault6533
Well unfortunately that's very disappointing. You think that they would have made a really nice product like this, more versatile. But that's inexperienced design engineers for you...
@ it may also be the safer way to go. I have found PD3.1 is not perfect, partly because of being new and not widely supported. That may be what the engineer s realized when this product was released. By not getting on the new standard, they were able to avoid potential usability issues.
Could you compare it to Miniware MDP P906 ?
Very in-depth review of the low cost DC 30V 5A.
Interesting PCB. I question the durability of the capacitors and copper coil, but could be OK for low voltage and milliamps.
📱💻
Good enough for firing up old ZX Spectrums where the caps may be bad...
interesting little thing with very affordable price. it reminds me in something similar from miniware but there with much higher price. i think it is relatively new so no long time experience is available. are there alternatives out there comparable in size and function?
Hi Guys !! Would you recommend this one or BSIDE i83010 ( at 30V/10A/300W cheaper version of the i84020 unit you tester few months ago). The portability and size is not important to me. 5 extra amps and 150 extra watts are also not important to me. Which one would you reccomend based on build quality and performance ? Thanks!
Brilliant! Can charge each of my 3 wives mobiles and still have an egg timer!
Judging by the inductor design this does not appear to be an isolated power supply. People need to be careful if using more than one of these (for example, to create a positive and a negative voltage) as there are certain situations where a short circuit and potential internal damage will occur (if they are both sharing the same power source or they are both connected to USB). Good lab power supplies are always isolated.
can you tell me what size barrel connector to use for DC input?
They are the standard 4mm ones.
@@KerryWongBlog Thanks. I'll order some. My 5.5mm didn't work.
The barrel connector size is 5.5x2.5mm!!!
@ The connector or the socket?
👍
I checked the FNIRSI web site downloads section snd there is a file for the DP-150 operating manual, but not yet any sign of a firmware update.
Of course they will update it, but only after a review by our Kerry specialist😉
@ I believe you may be correct. I have a feeling that comments here prodded Zotek to fix some problems with the Zoyi ZT-703S Oscilloscope Multimeter combo. It is a much better product after the firmware improvements.
Came so check if it is buck and boost. Noooo 😢
I have been waiting for my unit to arrive, but it was "lost in customs". The tracking info never changed from the drop ship USPS invoice they made. I had to file a claim with Paypal because FNIRSI wouldn't respond to my refund request.
Neat unit, awful company.
cool i want it send it to me please and thank you
You will probably get it from this youtuber before FNIRSI can send it to you, lol. Shitty company support.
@@natearrigoni lol true true