He provides a "thermal resistance budget" worksheet. If you have a MOSFET in a DPAK package and your ambient temperature is 60°C, the book tells you exactly how many square inches of copper you need to keep the junction below 125°C.
Caused by magnetic hysteresis and eddy currents within the ferrite core. It increases with frequency and flux density.
A power supply that cannot pass compliance testing is useless. Optimization must include EMI suppression from day one. Keeping high loops as small as possible to minimize radiated emissions. He provides a "thermal resistance budget" worksheet
Overview
Magnetics are often the most misunderstood part of power supply design. Maniktala highlights that optimizing an inductor or transformer is not just about satisfying inductance requirements. Designers must carefully calculate: It increases with frequency and flux density
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Transformers and inductors are usually the black magic of SMPS. Maniktala breaks down:
Balancing EMI reduction against the resulting increase in switching losses.
