Power supplies come in large varieties, can have different topologies, and feature numerous safeguards. Design of printed circuit boards (PCBs) for powers supplies can therefore, have infinite possibilities. Despite the huge variations involved, designers need to follow certain rules when designing PCBs for power supplies.
In general, a power supply draws in power, processes it, and provides a specified output that feeds a certain circuit connected to the power supply as load. We typically only use two types of power sources, AC or Alternating Current, and DC or Direct Current. The function of the power supply is to take in power at a certain voltage and current, and output nearly the same power but at a different voltage and current level. Apart from generators, a broad classification of power supplies divides them into inverter and converter types.