Products > Test Equipment

New miniature programmable DC power supply - FNIRSI DPS-150

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Aldo22:

--- Quote from: ArdWar on September 25, 2024, 01:49:25 pm ---Reading the manual (lol), this is buck only.

--- End quote ---

OK, thank you!
Congratulations on your 666th post.  :-DD

Fungus:

--- Quote from: Aldo22 on September 25, 2024, 10:08:19 am ---Do I understand correctly that it is not a step-up converter?

--- End quote ---

Yes, that's correct.

Input voltage must be higher than output voltage.

ptluis:

--- Quote from: Aldo22 on September 25, 2024, 10:08:19 am ---Do I understand correctly that it is not a step-up converter?
That is, the highest output voltage is equal to the input voltage?

On mysku there is a picture of the ripple/noise which doesn't look very good.
200mVpp is a lot.
Was it measured wrong, or how come?
Fnirsi says "<20mV ripple to protect sensitive electronics". But what's that? Vpp/Vrms?



--- End quote ---

Try to power the device from battery source and then take measures 200+mV are excessively high. I had one and the ripple values were around 28mv from battery source.

And if you supply it with 30V you won't get 30V at output mine did 28.6V

I return it because I work with higher voltages

Fungus:

--- Quote from: Aldo22 on September 25, 2024, 10:08:19 am ---Do I understand correctly that it is not a step-up converter?
That is, the highest output voltage is equal to the input voltage?

On mysku there is a picture of the ripple/noise which doesn't look very good.
200mVpp is a lot.
Was it measured wrong, or how come?
Fnirsi says "<20mV ripple to protect sensitive electronics". But what's that? Vpp/Vrms?

--- End quote ---

Ripple is periodic, you're looking at "noise".

At 20uS/div? I wouldn't like to say where that's coming from but the PSU should have a big capacitor across the output so it seems unlikely to be the PSU per se. Try switching some other things off.



Fungus:

--- Quote from: ptluis on September 25, 2024, 02:40:58 pm ---Try to power the device from battery source and then take measures 200+mV are excessively high.

--- End quote ---


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