LM3481: Can I use LM3481? Vin 9-36V, Vout 19V 3A.When I use WEBENCH,Report "Design cannot be created with this device.",why?

Hi user743401,

Thank you for considering the LM3481. Yes it support your use case. It is just a matter of the lack of coverage of our Webench tool for Sepic or flyback topology with the LM3481. Our Webench group is working to make the tool to cover more topologies but it takes time. You may contact TI sales team in your region, and ask them to help you submit a reference design request, then TI design service group will help you out.

Thanks,
Youhao Xi