What are the design considerations for GaN-based power converters?

GaN enables MHz switching but requires careful design: gate drive (low threshold voltage requires precise drive, 5-6V max Vgs), layout (minimize parasitic inductance - every nH matters at 10+ MHz, use vertical power loop), thermal management (GaN-on-Si has higher thermal resistance, lateral heat flow), dead time (shorter, 10-50ns), PCB design (thick copper, proper via stitching, controlled impedance), EMI management (higher dv/dt generates more common-mode current), and protection (very fast desaturation detection). Benefits justify effort for efficiency-critical and size-constrained applications like data center power.