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Compensation of power factor correction stage driven by NCP1654/5

Posted: 17 Dec 2008     Print Version  Bookmark and Share

Keywords:power factor correction  NCP1654/5 

Circuits for power factor correction have to shape the line current that is a low frequency signal. Hence, they are in essence extremely slow systems. That is why, the compensation of the PFC loop is generally not considered as a critical step when designing a power supply: "wildly shrink your bandwidth, that's it!" Still however, a PFC stage must be compensated and this unavoidable step should be properly performed for an optimised operation of the downstream converter and a satisfactory power factor. This application note shows how ON Semiconductor NCP1654/5 driven PFC can be compensated by the means of a systematic method. Reusable for other circuits, this process is practically illustrated through a wide mains, 300W application.

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