two series inductors instead of one bigger?

[delwin]

Hi, I have problems finding big ferrite cores from my local suppliers. The inductors I'm looking for are E55/21 or E65 (3C90) but the larges I could find are E42/20. The inductor is to be used in a CCM PFC, total inductance about 350uH@10Adc peak.

I'm wondering if I could use two E42/20 with half the inductance (175uH) to replace the one bigger (350uH)?

Is there any problems coming from this solution?

Thanks.

 

[keith1200rs]

There should be no problem using two series inductors instead of one larger one.

Keith.

 

[Mehrshad74]

No problem.
Also you can use Iron powder toroid(yellow/white) with smaller size for ccm mode.
Another solution is to use two smaller EE making a bigger one.(my favorite solution!)

 

[Orson Cart]

There is no problem with this approach, the total amount of material used (Ferrite, copper) will be higher than for a single choke solution, regards, Orson Cart.