Average current-mode control, as shown in Figure 1, is common in continuous-conduction-mode (CCM) power factor correction (PFC). It has two loops: a voltage loop that works as an outer loop and a ...

For high (80 to 90%) efficiency offline power converters from 200 to 600 W for applications such as flat-panel TVs PC and Workstations, and the latest generations of high-brightness LED streetlights, ...

The NCP1901, an integrated circuit that combines a PFC controller and a resonant half-bridge controller in a single package. The device meets worldwide efficiency standards such as Energy Star 2.0 for ...

In Part 1 of this article we discussed electric power basics and the need for and advantages of active power factor correction. The next question should be “Okay, then how does active PFC work?” ...