Today I wanted to try the
Soft Start CV Mode of my
Maynuo M9812B Electronic Load in believe that it would be more gentle for the power supply.
However when looking at the scope you can see that after turning on the load it first acts as a dead short and then ramps up the voltage until hitting the CV limit.
Is my understanding wrong, or did Maynuo implement this function incorrectly (maybe copied from CC mode)?
A part from the
Manual says:
In this mode, the measured power supplier can be avoided from current strike damage.
But the graph is clearly starting from 0 volts and the word "rise time" is reflecting my observation. So for the power supply it results in a current spike.
How should this function avoid "current strike damage" then. Shouldn't it start as "open circuit" and ramp down?
What is the correct use case if my understanding is wrong?
If I do not use the Soft Start it ramps down to V
const limit instantly. So this is not a load regulation problem of the power supply or a bug in general.
Shouldn't matter, but my settings were:
Power supply: V
set = 12 V, I
set = 500 mA
Electronic load: V
const = 5 V, T
rise = 10 s