There is so little info in class-D threads. So I share one of my plans. This is a simplified version of my TAS5630-based amp (without indicators, extras), for schematic see datasheet. This layout is built, and worked from supply levels 28V, 40V, 50V without error.
I attach the Sprint-Layout version of the layout, and GIF-exports. You can download free viewer for spint layout, and can use that to print layouts for toner-transfer. All GIF-exports are from top view, so appropiate mirroring should be checked for your method!
Attention should be done with IC's heatsinking. I use a small peace of 2mm thcik aluminium on the IC, under the heatsink to ensure, no other componentleg touches IC. Heatsink can be really small, output power can be 2x >200W at 4 Ohm, depending on supply.
Output inductors are Coilcraft ED0006-AL ones (their core is T106-2, and wound with 0,8mm copper wire to 20uH). Original inductor in evaulation design is T94-2 wound with 1mm copper wire. Minimum inductor is 7uH, but i reccomend >10uH. With mine I measured output switching freq ripple of 2-3mV at no input signal, due to BD modulation.