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Power Supply Cookbook, 2nd Edition
book

Power Supply Cookbook, 2nd Edition

by Marty Brown
June 2001
Intermediate to advanced content levelIntermediate to advanced
280 pages
10h 38m
English
Newnes
Content preview from Power Supply Cookbook, 2nd Edition
4.6 Quasi-resonant Converters
Quasi-resonant converters are a separate class of switching power supplies that
tune the ac power waveforms to reduce or eliminate the switching loss within
the supply. This is done by placing resonant tank circuits within the ac current
paths to create pseudo-sinusoidal voltage or current waveforms. Because the
tank circuits have one resonant frequency, the method of control needs to be
modified to a variable frequency control where the resonant period is fixed and
the control varies the period of the non-resonant period. The quasi-resonant
converters usually operate in the 300kHz to 2MHz frequency range.
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Publisher Resources

ISBN: 9780750673297