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NCP1611 Datasheet High-efficiency Power Factor Controller

Manufacturer: onsemi

Overview: NCP1611 Enhanced, High-Efficiency Power Factor Controller The NCP1611 is designed to drive PFC boost stages based on an innovative Current Controlled Frequency Fold−back (CCFF) method. In this mode, the circuit classically operates in Critical conduction Mode (CrM) when the inductor current exceeds a www.onsemi.com programmable value. When the current is below this preset level, the NCP1611 linearly decays the frequency down to about 20 kHz when MARKING the current is null. CCFF maximizes the efficiency at both nominal DIAGRAM and light load. In particular, the stand−by losses are reduced to a minimum. Like in FCCrM controllers, internal circuitry allows near−unity power factor even when the switching frequency is reduced.

Key Features

  • necessary for robust and compact PFC stages, with few external components. Features.
  • Near.
  • Unity Power Factor.
  • Critical Conduction Mode (CrM).
  • Current Controlled Frequency Fold.
  • back (CCFF): Low Frequency 8 1 SOIC.
  • 8 CASE 751 SUFFIX D 8 NCP1611x ALYW G 1 NCP1611x = Specific Device Code x = A or B A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb.
  • Free Package Operation is Forced at Low Current Levels.
  • On.

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