Off the shelf ferrite core for 45Amp, 9uH inductor?

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treez

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Hello,
Here in MaryLand we have to make a 9uH inductor which will be used in a 650W, 200KHz, CCM boost converter.
The inductor current is triangle between 47 Amps and 42Amps, with around 45 Amps RMS current.

We only have the PQ40/40 ferrite core set so far, but is there any smaller type of ferrite formers which are used for inductors specifically? The PQ4040 former is a bit too big and spacious for us.

PQ40/40 ferrite core datasheet:
**broken link removed**
 

What material are you using? Have you done any actual calculations of power loss/temperature rise? That has to be the starting point.

For a 650W supply, such an inductor size is not really big at all, even at 200kHz. If power density is a priority you may consider integrated magnetics.
 
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