I am designing a boost converter. I know maybe the specs I want would suit better in another topology like Half-Bridge or Full-Bridge but the boost topology is simpler and inductor winding is simpler too I think.
My boost converter should be:
- 14V input voltage
- 15 to 30V output voltage
- 10A output current so the output power will be 30*10 = 300W
- 300KHz switching frequency
I am using this application note from Texas Instruments and I am getting this results:
- Inductor value: 2.5uH
- Max switch current: 45A
Is it possible inductor has such a low value? Is the peak current really that high? I am planning to use an IRFZ44 MOSFET that specifies a Pulsed Drain Current of 200A, is that the parameter I have to look at or should I calculate Irms and look at Continuous Drain Current?
Also I was looking at this core but the Al value is so big I doesn't event need a turn around the core to get 2.5uH! So I can't use this core?
Also I would like to know how to calculate the inductor to ensure I am not exceeding the Maximum Flux Density. I have a book called Power Supply Cookbook but it seems to focus more on Half-Bridge and Full-Bridge inductor design than Boost design.
I am not an expert so there are a lot of things I don't know any guidance, book, links would be really appreciated! Thanks!