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NCP1612A Datasheet High-efficiency Power Factor Controller

Manufacturer: onsemi

Overview: DATA SHEET .onsemi. Enhanced, High‐Efficiency Power Factor Controller NCP1612A, NCP1612B, NCP1612A1, NCP1612A2, NCP1612A3, NCP1612B2 The NCP1612 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 programmable value. When the current is below this preset level, the NCP1612 linearly decays the frequency down to about 20 kHz when the current is null. CCFF maximizes the efficiency at both nominal and light load. In particular, the stand-by losses are reduced to a minimum. Like in FCCrM controllers, an 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. General Features.
  • Near-unity Power Factor.
  • Critical Conduction Mode (CrM).
  • Current Controlled Frequency Fold-back (CCFF): Low Frequency Operation is Forced at Low Current Levels.
  • On-time Modulation to Maintain a Proper Current Shaping in CCFF Mode.
  • Skip Mode Near the Line Zero Crossing.
  • Fast Line/Load Transient Compensation (Dynamic Response Enhancer).
  • Valley.

More Datasheets from onsemi

Part Number Description
NCP1612A1 High-Efficiency Power Factor Controller
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NCP1612A Distributor