Here is how I “think” these drivers work based on my other experience with CCCV supplies…keep in mind I have never touched one of these specific drivers, and cant find any detailed instructions, so take this with a (very) large grain of salt
Since these are designed specifically to drive LED’s, I am assuming they must prioritize the CC mode when operating as long as you have the settings within the ranges listed in the specs. Again, because if they didnt, there would be instant runaway of the current and burned up LED’s if the current wasnt limited.
I think the voltage setting is going to work like an upper limit while the current setting has priority. In other words, you set the current to a certain value within the spec’ed range, and the driver will increase the voltage until that amount of current is flowing - up to the limit set by the voltage pot.
Thats going to work in reverse to some degree. If the voltage gets turned down to a voltage thats less than the total of the series voltage of the LED’s, then the current will drop to what ever level is dictated by the graph above that shows the voltage/current relationship. The current will still be limited and have priority over voltage changes.
In other words, if you set the voltage output to be say 3 volts/led, the current will go up to 2 amps per LED - IF - both total voltage and total current of all the LED’s on the board falls within the adjustment range of the driver.
At the same time, if you turn UP/DOWN down the voltage or the current settings, the total other one will increase/drop no matter what the setting is - all based on that graph showing the current vrs voltage of each LED.
Once things have settled, the current will be held constant - as long as both current and voltage fall within the adjustment range.
I hope that makes sense. I didnt express it very well.