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NCP1680 Datasheet Totem Pole Crm Power Factor Correction Controller

Manufacturer: onsemi

Overview: CrM Totem Pole PFC IC Totem Pole CrM Power Factor Correction Controller NCP1680 The NCP1680 is a Critical Conduction Mode (CrM) Power Factor Correction (PFC) controller IC designed to drive the bridgeless totem pole PFC topology. The bridgeless totem pole PFC consists of two totem pole legs: a fast switching leg driven at the PWM switching frequency and a second leg that operates at the AC line frequency. This topology eliminates the diode bridge present at the input of a conventional PFC circuit, allowing significant improvement in efficiency and power density.

Key Features

  • Totem Pole PFC Topology Eliminates Input Diode Bridge Enabling Very High Efficiency & Compact Design.
  • AC Line Monitoring Circuit & AC Phase Detection.
  • Brownout Detection.
  • Critical Conduction Mode (CrM) Operation.
  • Discontinuous Conduction Mode (DCM) with Valley Turn On under Light Load Conditions.
  • Frequency Foldback in DCM with 25 kHz Minimum Frequency.
  • Digital Loop Compensation.
  • Simplified Valley Sensing.
  • Novel Cur.

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NCP1680 Distributor