NCL2801 - High-Efficiency Power Factor Controller
DATA SHEET www.onsemi.com Power Factor Controller, High-Efficiency, Enhanced for Lighting 8 1 SOIC 8 CASE 751 NCL2801 The 8 pin PFC controller NCL2801 is designed to drive PFC boost stages.
It is based on an innovative Valley Count Frequency Fold back (VCFF) method.
The circuit classically operates in Critical conduction Mode (CrM) for high load values.
When the load decreases a Discontinuous Conduction Mode DCM is forced by forcing a dead time which, by construction c
NCL2801 Features
* necessary for robust and compact PFC stages, with few external components. General Features
* Near
* Unity Power Factor
* Critical Conduction Mode (CrM)
* Valley Count Frequency Fold
* Back (VCFF)
* Peak Current Control Mode to Maintain a Proper Current Sh
