I have problem with designing buck converter.
I have tried to design it by using instructions from this site:
And here are my parameters:
V input - 72V max
V output - 12 V switching frequency - 100 kHz ( LTC3703)
I max -1,5 A
However, my teacher has given me a \$15 \mu\$H inductor and said that I should use that one, and that is where my problems start.
When I go to design it using formula for inductor, LIR is extremely big ( somewhere around 4-5, instead between 0.2-0.5 like proposed on web site )
This is the inductor we are using
So can someone help me to get good LIR, or should I say that we can't use this inductor?