I am wanting to use a Mean Well 65W DC to DC LED driver powered off of a 24v Mean Well power supply. The data sheet recommends this circuit and they provide enough information I think I could make my own common mode chokes but I thought it would be easier to buy them on Digikey.

I see they recommend to have 3 common mode chokes in series with the first 2 being "parallel" and the 3rd being "separate". I assume they are referring to the way the wires are wound like this with the left one being parallel and the right being separate.

When I filter 10-11mH and more than 2.5A on Digikey all of the results appear to have the windings separate on either a ring or straight bar.

My first question is does this matter? Are the instructions telling just me a way to make a 10.7mH common mode choke but practically there are many ways to make something that achieves the same thing?

My other question is Digikey shows the inductance value at a certain frequency (11mH @ 1kHz, 11mH @ 10kHz, 11mH @ 100kHz). How do I know what Mean Well wants me to use based on the information they provided?

 

There are three factors: intrawinding capacitance (between adjacent turns of the same winding), interwinding capacitance (between the two windings), and leakage inductance. The bifilar wound version (left drawing) has less leakage inductance, and more interwinding capacitance.
Leakage inductance is a good thing, as it provides some differential filtering for free.
Intrawinding capacitance is bad, as it provides a capacitor in parallel with the inductor which lets high frequencies through.
Interwinding capacitance is neutral, as it is in parallel with a capacitor that is already there.
Intrawinding capacitance is minimised by winding the choke in sections with spacers between them (which would be tricky on a toroid), but spacing the turns out instead of winding the whole lot clumped together helps.