I have a PS built on an earlier DPS5015 (non communicating) model fed from a 750VA torroid. It is working perfect.
I have measured with my scope the output of the PS (attached is a screenshot). CH1 is connected to DPS5015 negative, CH2 probe to +. Crocodile clips are attached to the scope earth (same potential as the metal case of the PS as Dave earlier showed in his video about scope safety).
What I see is when PS power is on (DC output of DPS5015 is still off) on both channels there is a sine wave: Pk-Pk=278V, Max=142V, Min=-138V, RMS=94V, f=49.85Hz absolutely overlaping. So, there is no potential difference between the thwo output leads.
When I turn the DC output on and crank the voltage up, the two waves are separating as you can see on the sreenshot. Mesurment is on for CH1, MATH is calculating CH1-CH2.
Readings of CH1 and CH2 (not visible on the picture) at 50VDC output with no load: CH1/CH2, Pk-Pk=278/278V, Max=166/116V, Min=-112/-166V, Ampl=280/280V, RMS=98.9/96.8V.
MATH: Pk-Pk=4V, Max=52V, Min=48V, Ampl=4V, Mean=50V. This is the white line. So, there you have the 50VDC output.
Question: DPS5015 is said to be a buck converter, but it seems to (me) operate different.
Could someone more experienced put some light on basic operating principle, please or direct me to a site describing it.
If it is unic, we may ask Dave to do a review sometimes.