Choosing Between Semi-Bridgeless and Interleaved PFC Pre-Regulators

摘要

Designers have a choice between semi-bridgeless and interleaved PFC pre-regu-lators. The semi-bridgeless removes half the bridge-rectifier losses, whereas the interleaved PFC can reduce I~2R losses up to 50%.rnTo help conserve energy some utility companies and environmental agencies have developed initiatives and incentive programs to make offline ac-dc converters more efficient. To reduce power line transmission losses, these same agencies are requesting that offline converters have power factor correction (PFC).