App note: Power supply layout and EMI
Reduce EMI by determining large alternating currents carrying areas and making them compact, this minimizes radiation and spilling of unwanted signal to other part of your PCB. More of these methods are shown from Linear Technology’s app note.
This entry was posted in app notes and tagged app note.
PC-board layout determines the success or failure of every power supply project. It sets functional, electromagnetic interference (EMI), and thermal behavior. Switching power supply layout is not black magic, but is often overlooked
until it is too late in the design process. Fortunately physics
is on your side. Functional and EMI requirements must
be met, and in a world of trade-offs in power supply unit
layout, what is good for functional stability is good for
EMI. Good layout from first prototyping on does not add
to cost, but actually saves significant resources in EMI
filters, mechanical shielding, EMI test time and PC board
runs. This application note focuses primarily on nonisolated
topologies, but will examine some isolated topologies as
well. You will learn to make the optimum choices regarding
PC-board layout for solid power supply designs.