Power Factor Correction (PFC) is becoming an integral, and often necessary, piece of a power conversion system. This is particularly true for high-power systems. Interleaving, the technique of using multiple channels in a distinct phase arrangement, is a method of overcoming the challenges associated with single-channel, high-power PFC systems. Advantages such as reduced input current ripple, reduced PFC inductor volume, and higher efficiency are attractive reasons to consider interleaving for a PFC circuit. Fairchild's FAN9673 offers features such as phase management, average current mode control, programmable output voltage and all the necessary protection features allowing a highly efficient and robust PFC design. This webinar will explain the reasons for poor power factor and then look at the various methodologies to address PFC including interleaved continuous conduction mode with Fairchild's FAN9673, a new three channel interleaved continuous conduction mode PFC controller that enables the design of a robust high power PFC circuit. A design example will illustrate a method for developing a high-power PFC system with the FAN9673.
- Understand the techniques of using multiple channels in a distinct phase arrangement to overcome the challenges associated with single-channel, high-power PFC systems.
- Discover why the advantages - such as reduced input current ripple, reduced PFC inductor volume, and higher efficiency - are attractive reasons to consider interleaving for a PFC circuit.
- Learn about the reasons for poor power factor and the various methods for addressing PFC, including interleaved continuous conduction mode.
- Explore a design example, which will illustrate the method to design a high power PFC system.
Carl Walding is currently a field applications engineer for Fairchild Semiconductor, covering the north central U.S. He has been with Fairchild for almost ten years. Prior to coming to Fairchild, he worked as an applications engineer at ON Semiconductor. Before joining ON Semiconductor, he spent over 20 years at Zenith Electronics, where he worked as a design engineer and manager in the power supply design group for consumer products. At Zenith, he and his group developed power supplies and power management circuitry for products such as color TV, color computer monitors, HDTV, and set-top-boxes.