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Open-Loop Control Methods for Interleaved DCM/CCM Boundary Boost PFC Converters

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3 Author(s)
Laszlo Huber ; Power Electron. Lab., Delta Products Corp., Research Triangle Park, NC ; Brian T. Irving ; Milan M. Jovanovic

Open-loop interleaving methods for PFC boost converters operating at the boundary of discontinuous-conduction mode and continuous-conduction mode with a master-slave relationship are analyzed. It is shown that the only method that results in stable operation is the synchronization of the slave converter to the turn-on instant of the master converter, where each converter operates with current-mode control. Effects of mismatched inductances, phase-shift error, switching-frequency limit, and valley switching on the quality of the input current are discussed in detail.

Published in:

IEEE Transactions on Power Electronics  (Volume:23 ,  Issue: 4 )