Buck Converter Losses Under the Microscope

by Alan Elbanhawy, Director, Computing and Telecommunications Segments, Advanced Power Systems Center, Fairchild Semiconductor, San Jose, Calif., Power Electronics Technology, Feb 01 2005

Focus:
Parasitic inductances associated with MOSFET packaging and pc board traces contribute to power losses while limiting switching frequencies in synchronous buck converters used in VRM designs.

What you’ll learn:

• How to analyze the impact of parasitic inductances (MOSFET package lead inductance and pc board trace inductances) on synchronous buck converter efficiency and switching speeds
• How to noninvasively measure current in high-frequency buck converters

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