Fnirsi DPS-150 Programmable Mini Power Supply Review and Teardown

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cool i want it send it to me please and thank you

my address is 438 Loomis Brook RD Walton New York 13856 ill be waiting thanks your a great person

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?

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.

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.

You do great product reviews

As usual, well done Kerry! I would mount a small cooler with a thermal sensor there, in case of prolonged use of the converter.

Great video as usual. Professional, unbiased and informative. Thank you.🙏

Brilliant! Can charge each of my 3 wives mobiles and still have an egg timer!

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.
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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.

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.

Thank you for a very informative review

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!

If OCP or OVP (red) lights up, simply press “home” twice until “OK” (green) appears again.
The protection will then work again.

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!

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.

Could you compare it to Miniware MDP P906 ?

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.

Came so check if it is buck and boost. Noooo 😢

can you tell me what size barrel connector to use for DC input?