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New miniature programmable DC power supply - FNIRSI DPS-150

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Aldo22:
But it's pretty noisy.
Why didn't anyone tell me that?  ;)

Attached (all without load):
1. DPS-150 without 'scope BW limitation / 12V
2. DPS-150 with BW limitation 20MHz / 12V
3. for comparison my self-built (linear) PSU / 12V. Same measurement conditions, without BW limitation

P.S. On / Off characteristics here:
https://www.eevblog.com/forum/testgear/lab-power-supply-turn-on-and-off-characteristics/msg5680719/#msg5680719

DaneLaw:

--- Quote from: Aldo22 on October 17, 2024, 04:39:22 pm ---But it's pretty noisy.
Why didn't anyone tell me that?  ;)

--- End quote ---

You didn't check the specs?
Do you have a picture of your setup..?

Aldo22:
Hi


--- Quote from: DaneLaw on October 17, 2024, 06:30:19 pm ---You didn't check the specs?

--- End quote ---

Where are the exact ripple/noise specs?


--- Quote from: DaneLaw on October 17, 2024, 06:30:19 pm ---Do you have a picture of your setup..?

--- End quote ---

Not today, the setup is no longer there.

DaneLaw:

--- Quote from: Aldo22 on October 17, 2024, 06:59:46 pm ---Hi

--- Quote from: DaneLaw on October 17, 2024, 06:30:19 pm ---You didn't check the specs?

--- End quote ---
Where are the exact ripple/noise specs?

--- Quote from: DaneLaw on October 17, 2024, 06:30:19 pm ---Do you have a picture of your setup..?

--- End quote ---
Not today, the setup is no longer there.

--- End quote ---

I posted a video some weeks back also in this thread. seems it's gone, at my end
Will see if I can find it.
Reason why I ask for "setup" is to get an idea if it is the DPS150 SMPS or third party your witnessing

*One moment please (credit bigClive)*

// I recall this video also refers to the DPS150 tolerances.

--- End quote ---


The specs .. you can find in the older DPS-150 thread..not sure why this OP (LeonR) decided to restart another DPS150-thread with no input, when there already was one, just below from a day earlier that would be hard to miss  https://www.eevblog.com/forum/testgear/new-fnirsi-dps-150-mini-lab-power-supply-(30-v-5-a-usb-pd-powered)

Board pictures.(crude, from older vid)

Aldo22:
It's OK.
You asked me if I hadn't checked the specs. I still don't know where to find the ripple/noise specs.
But never mind, I can measure it myself now.  ;)


--- Quote from: DaneLaw on October 17, 2024, 07:07:41 pm ---Reason why I ask for "setup" is to get an idea if it is the DPS150 SMPS or third party your witnessing

--- End quote ---

The third screenshot above shows the source for the DPS -150 in the other cases. It is super quiet.
The measurement method is identical.

Thanks.

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