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Problem Addressed

Traditional magnetic converters such as forward converters or flyback converters are generally simple, low-cost and easy to control. However, there is a continued trend to operate power converters at ever increasing switching frequencies. As switching frequencies increase, the converter timing becomes difficult to satisfy, and parasitic losses become significant. Furthermore, it becomes more challenging for designs of the power converter systems due to requirements for achieving high performance in efficiency, power density, ac line synchronization, total harmonic distortion (THD) or power factor, over a wide operating range of universal line input voltages.