With the rise of low-profile, high-density power converters (DC-DC bricks, POL converters), the updated PDF dedicates an entire section to planar E-core and low-profile RM cores. It covers PCB winding techniques and interleaving for reduced AC resistance.
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Yes, partially. The updated versions include a section on "Low Profile Cores" (ER, EQ, and ELP shapes) not found in the original 1988 edition.