Where to Place Bulk Caps

Hello,

In a motor drive application PCB i have huge 8 Bulk Caps (330uF each) but couldnt decide where to place before or after DC-DC Swicthing converter?

DC motors and MCU are powered after DC-DC convertion.

1_If i place them before DC-DC convertion then start of motors excessive current will do damage to converter.
2_If i place them after converter, when first power up the system converter also consume huge power in order to fill the caps.

What do you think?

Thank you.
leopardtron pcb

My experience is that bulk capacitance can be placed anywhere on the board. Just make sure you have wide traces or directly connect to power planes. If you know you will have large amounts of current look at the current paths. Don't forget the return current.