I'm thinking of using the LM5017 for a design with the following requirements:
9V - 72V in
5V, 0.5A max out
If I enter these requirements into the Webench Designer dialog at http://www.ti.com - the results returns a design option with the LM5017, which I can open, review, etc.
If, however, I enter these same requirements into the Webench Designer LM5017 dialog on the LM5017 product page, and click "Open Design", the design fails for "Calculated duty cycle exceeds limit", among other things.
Why would the design fail when run from Webench on the LM5017 product page, but not when run from Webench on the main page?
I tried looking at the datasheet to get a better understanding of the maximum duty cycle, but am having trouble understanding how to calculate this based on the on-time. Is there a constant-on-time design tutorial somewhere that can help in determining this?
