Two-phase interleaved PFC converter with power metering

Texas Instruments (TI) now offers a digitally-controlled two-phase interleaved 700W power factor correction converter design with added power metering functionality. A C2000 Piccolo microcontroller controls the two 180 degree phase shifted boost power stages that comprise the power factor correction converter, and additionally, it monitors the line and neutral voltage waveforms to implement power metering functions. The design is able to achieve 97% efficiency and 1.5% THD at full load with power factor greater than 0.98. By minimizing power loss in the power stage, reducing reliability impacts of harmonic distortion, and providing near unity power factor, the design is ideal for off-line applications and AC/DC power supplies, says the company.