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TPS92210's buck converter calculation formula?

Other Parts Discussed in Thread: TPS92210

Hello,

I'm using TPS92210 for LED lighting that Topology is Buck converter.

Also used PMP3672 Reference designs schematic. (http://www.ti.com/lit/df/slvr948/slvr948.pdf)

input voltage is unversal(both low line and high line, 90~240Vac), Output current is 450mA.

in case of flyback type,

I have found the caluration formula by xls(sluc242.zip)

But in case of buck converter,

I couldn't find the calulation formula!!

I have to set the exact values of the Inductor and others main R/C components.

1)  inductor matching inductance value?

2) peripherals R/C components matching values?

If have the TPS92210 buck design Tool?

Could you please let me know how to calulate the main components?

thanks,

eric