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两个TPS543C20并联输出80A电流PCB设计

Other Parts Discussed in Thread: TPS543C20

设计使用两个TPS543C20并联(12V~0.9V)输出80A电流,请教PCB设计时,电感输出端外接一大块铜皮,需要在该铜皮上打过孔连接到内部电源层,通过电源层给其他器件供电。请教各位在该铜皮上打过孔(过孔能通过80A电流),需要打多少过孔?(假如铜皮为0.5oz,过孔内径10mil/外径22mil)