My circuit is designed for two to three 2.79Vf LEDs @ 3A (Cree XP-L on giant heatsink). It is powered from a 12VDC motorcycle battery.
The two vias in question are placed between the FB pin and Rsense in the layouts below.
I already sent my gerber files to JLCPCB, but I think I made a big mistake. I followed the datasheets layout for the demo-board (attached) and connected LED return (-VLED) into the FB loop using two vias. I now realize that those two little vias are likely insufficient for handling the return of the LEDs @ ~9V, 3A.
Are those vias (and the associated trace on bottom/blue layer) enough to handle that kind of power? It seems like it may be an insufficient ground.