What are you running there? 4 lots of 20V 4A? So 80w for each regulator. That's right at the top of their range. They are 75w if you can keep them cool with additional heatsinks.
I might be tempted to run two boards in parallel, for each of the four circuits. Each board would still need a little help keeping cool, as they are 35w without heatsinks. You could just glue any heatsink to the chips though. Bit of thermal epoxy could glue on a flat headed screw. That would get 35w up to 40w surely, as it's likely doubling the chips surface area.
You would really have to run one and look it over. If you feed one say 30v while asking it to produce 20v, that is a lot more work than feeding it 22v and asking for 20. I pick 2v as the offset as often you need the input higher than the output. I think this design doesn't but I picked up on the 38v max in and 36v max out. Again... testing
Cheap boards. Hopefully parallel is fine. It usually is. I would ask though or look on youtube perhaps
I might be tempted to run two boards in parallel, for each of the four circuits. Each board would still need a little help keeping cool, as they are 35w without heatsinks. You could just glue any heatsink to the chips though. Bit of thermal epoxy could glue on a flat headed screw. That would get 35w up to 40w surely, as it's likely doubling the chips surface area.
You would really have to run one and look it over. If you feed one say 30v while asking it to produce 20v, that is a lot more work than feeding it 22v and asking for 20. I pick 2v as the offset as often you need the input higher than the output. I think this design doesn't but I picked up on the 38v max in and 36v max out. Again... testing
Cheap boards. Hopefully parallel is fine. It usually is. I would ask though or look on youtube perhaps