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NCL2801 - High-Efficiency Power Factor Controller

Key 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 Shaping in VCFF Mode.
  • Fast Line / Load Transient Compensation (Dynamic Response Enhancer) Option.
  • Brown.
  • out Detection.
  • Two.
  • level Line Feed.
  • Forward (HL&.

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Datasheet Details

Part number NCL2801
Manufacturer onsemi
File Size 421.54 KB
Description High-Efficiency Power Factor Controller
Datasheet download datasheet NCL2801 Datasheet

Full PDF Text Transcription for NCL2801 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for NCL2801. For precise diagrams, and layout, please refer to the original PDF.

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 driv...

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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 corresponds to a fixed number of valleys. The lower the output power, the higher the number of valleys corresponding to the dead time. After DCM works down to 6th valley switching and if the load continues to decrease, a dead time is continuously added to th

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