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Interleaved PFC in critical conduction mode

Posted: 30 Apr 2014  Print Version  Bookmark and Share

Keywords:power factor correction  digital signal controllers  PFC  DSC  power conversion 

This application note describes the digital implementation of an interleaved power factor correction (PFC) that operates in boundary conduction mode (BCM) for the Freescale MC56F82xxx digital signal controllers (DSC). Peripherals available on this DSC enable easy implementation of power conversion applications.

Two-channel interleaved PFC operating in BCM (also called Critical conduction mode CrM) is used for low and middle power AC to DC conversion with compensating power factor (PF). Interleaved topology used to compare a single channel increases power density, reduces ripple currents, and improves overall efficiency.

The purpose of this application note is to describe in detail the implementation of BCM on the MC56F82316 and enable application engineers to speed up implementation of PFC.

This document includes the control scheme, the system design concept, peripheral configuration, and software design.

View the PDF document for more information.

Originally published by Freescale Semiconductor at www.freescale.com as "Single Phase Two-Channel Interleaved PFC Operating in CrM".





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