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NCP1681 - Totem Pole Power Factor Correction Controller

Datasheet Summary

Description

Combined OVP/OTP fault pin.

tions.

Features

  • Totem Pole PFC Topology Eliminates Input Diode Bridge Enabling Very High Efficiency & Compact Design.
  • AC Line Monitoring Circuit & AC Phase Detection.
  • Brownout Detection.
  • Digital Loop Compensation.
  • Novel Current Sensing Scheme Providing Inductor Current Upslope and Downslope Sensing.
  • PFCOK Indicator.
  • Skip/Standby Mode for Optimizing Light Load Performance.
  • Near.
  • Unity Power Factor in All Operating Modes Multi.

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Datasheet preview – NCP1681

Datasheet Details

Part number NCP1681
Manufacturer ON Semiconductor
File Size 2.17 MB
Description Totem Pole Power Factor Correction Controller
Datasheet download datasheet NCP1681 Datasheet
Additional preview pages of the NCP1681 datasheet.

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Full PDF Text Transcription

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DATA SHEET www.onsemi.com Totem Pole Power Factor Correction Controller NCP1681 The NCP1681 is an innovative Multi−Mode (MM) and Continuous Conduction Mode (CCM) 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. The NCP1681 is available as a Fixed Frequency (NCP1681Ax) or Multi−Mode (NCP1681Bx) device.
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