[SI-LIST] Re: Inductor selection

Gaurav, it depends

There are any number of good books on SMPS converters out there, and plenty 
of material available from raw material vendors, as well as assembled 
inductor mfg's.

What is "best" is a compromise of a number of factors, including:  cost, 
size, and efficiency.  Forward converters tend to use MnZn ferrites in any 
of a number of forms for the transformer, while flybacks, and SEPIC 
transformers and foward converter output chokes will need either a gapped 
ferrite or for lower frequency application powdered Fe that can support a 
large H.  Toroids tend to have the best efficiency and size, but highest 
cost.  Most modern production switchers use either a toroid ( encapsulated 
supplies ) or more often now planar magnetics.

Steve.
At 04:00 PM 9/28/2004 +0530, Gaurav MATHUR wrote:
>Hello,
>   Can anybody tell me which type of inductor is best for DC-DC switching =
>regulator.=20
>Regards,
>Gaurav.
>
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