Comparing Bridgeless versus Interleaved Power Factor Correction
Environmental concerns lead to stringent efficiency requirements when designing modern power supplies. Compactness and form factor are other drivers for high efficiency while in all cases, cost effectiveness remains a key requirement.
These constraints dramatically affect the PFC stage which, together with the EMI filter, can easily consume from 3% to 6% of the output power at low line, full load.
The topic shows in a first step, that the control scheme can help to optimize the efficiency over the load range while reducing the cost by a multi-mode concept. In a second step, the architecture aspect will be considered with in particular the bridgeless and interleaved approaches. Respective merits of these solutions will be compared in a 300-W, wide-mains application.
Applications Engineer, ON Semiconductor
Bryan McCoy is an applications engineer at ON Semiconductor developing ac to dc and dc to dc products in the consumer, industrial and telecommunications space. Prior to his employment at ON Semiconductor, he developed ac to dc and dc to dc charger products for Mobility Electronics. He has published numerous technical papers and has 6 patents issued. Bryan McCoy obtained his Bachelor of Science degree in Electrical Engineering from Arizona State University in 2004. He also hold an Associates degree in avionics technology. In addition, he served four years in the Air Force as an F-16 Specialist.
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