High power Boost PFC inductor?

[treez]

Hello,
This is related to the above.
The kool mu core inductor is no good for use with the FAN9672 PFC controller, because of the "linear prediction" algorithm. Do you know off an off the shelf ferrite torroid core which can be used for an inductance of 450uH and 20 Amps peak current?
At these high current levels, ferrite torroids are rare. The kool mu is great, but the variation in inductance with current means that FAN9672 cannot use it.
FAN9672 datasheet:
https://www.fairchildsemi.com/datasheets/FA/FAN9672.pdf

 

[Easy peasy]

Not a bad looking chip, it is doubtful whether the variance of a Kool mu choke would greatly upset the operation.

However, our experience with PFC chips in this series is that they are somewhat susceptible to the noise from the down converter if not totally soft switched - so beware...!