Products > Test Equipment

Lab Power Supply Turn ON and OFF Characteristics

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mawyatt:

--- Quote from: Aldo22 on October 06, 2024, 04:39:27 pm ---
--- Quote from: mawyatt on October 06, 2024, 04:35:01 pm ---Not sure how the interpret the scales on your DSO, but this doesn't look good!! Seems the supply takes ~ 6 divisions to return to the Current Limit 40mA set point. If that's 500ms/div then 3 seconds!! Even if the entire span is 500ms, then ~200ms which is quite long.

--- End quote ---
The scope does not lie.
It takes this long with 47Ω.
It is faster with a “short circuit”.

--- End quote ---

What is the time scale, is it 500ms/Div?

That looks like ~160mA for ~6 horizontal divisions!!!

Best

Aldo22:

--- Quote from: mawyatt on October 06, 2024, 05:02:25 pm ---What is the time scale, is it 500ms/Div?

--- End quote ---

Yes. (Top: Hantek -> Stop -> H -> 500ms)


--- Quote from: mawyatt on October 06, 2024, 05:02:25 pm ---That looks like ~160mA for ~6 horizontal divisions!!!

--- End quote ---

Yes. The DMM shows a Max of 174mA

Furna:

--- Quote from: Aldo22 on October 06, 2024, 05:02:00 pm ---Yes, it's a bit different.

--- End quote ---

... and the 100µs/Div?

mahi:

--- Quote from: mawyatt on October 06, 2024, 01:40:11 pm ---6 ) Set DSO to 0.5V/Div for full scale with 4V.
--- End quote ---

Shouldn't we take 1V/div because we already know certain power supplies will go up to 8V for a brief moment. Or don't we care about same scales for everyone?

mawyatt:

--- Quote from: Aldo22 on October 06, 2024, 05:05:56 pm ---
--- Quote from: mawyatt on October 06, 2024, 05:02:25 pm ---What is the time scale, is it 500ms/Div?

--- End quote ---

Yes. (Top: Hantek -> Stop -> H -> 500ms)

--- End quote ---

So ~160mA with 40mA Current Limit for 3 seconds :P

Best

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