XL4005 5A CC, CV step down converter

[upsss]

Hi, does anyone have any practical experience with this specific XL4005 5A CC, CV step down converter.  https://www.aliexpress.com/item/5A-DC-to-DC-CC-CV-Lithium-Battery-Step-down-Charging-Board-Led-Power-Converter-Lithium/32811197781.html?spm=2114.13010608.0.0.RFa9j5  I believe I have the exact schematic of this converter. 

The step down adjustable part of the converter works fine.  The problem is that once I hit the "CC" setting the output drops to ~300mv.  So it looks like it limits the output current but it doesn't provide CV and CC output and this problem exist at any output voltage and current setting. 

I have used before a similar converter module that used an LM2596 and the CV, CC worked as it should, it provided CV CC at any settings.  I am wondering if this module is defective or for some reason it was designed as such and it is not really a CV, CC regulator. 

[sleemanj]

The problem is that once I hit the "CC" setting the output drops to ~300mv.

And what is the current being supplied at that point?  Is it your set current?

[upsss]

OK, it was my problem, just a pilot error.  I was using a constant current electronic load for my testing.  Once I connect a load like a battery, I was able to maintain CC at any output voltage setting as expected.  Great, now I am going to built a nice little fully adjustable CV CC bench power supply.