The NCP1652 is a highly integrated controller for implementing power factor correction (PFC) and isolated step down ac-dc power conversion in a single stage, resulting in a lower cost and reduced part count solution. This controller is ideal for notebook adapters, battery chargers and other off-line applications with power requirements between 75 W and 150 W. The single stage is based on the flyback converter and it is designed to operate in continuous conduction (CCM) or discontinuous conduction (DCM) modes.

The NCP1652 increases the system efficiency by incorporating a secondary driver with adjustable nonoverlap delay for controlling a synchronous rectifier switch in the secondary side, an active clamp switch in the primary or both. In addition, the controller features a proprietary Soft-Skip™ to reduce acoustic noise at light loads. Other features found in the NCP1652 include a high voltage startup circuit, voltage feedforward, brown out detector, internal overload timer, latch input and a high accuracy multiplier.

Key Features:

  • Dual Control Outputs with Adjustable Non Overlap Delay for Driving a Synchronous Rectifier Switch, an active Clamp Switch or Both
  • Voltage Feedforward Improves Loop Response
  • Frequency Jittering Reduces EMI Signature
  • Proprietary Soft−Skip™ at Light Loads Reduces Acoustic Noise
  • Brown Out Detector
  • Internal 150 ms Fault Timer
  • Independent Latch−Off Input Facilitates Implementation of Overvoltage and Overtemperature Fault Detectors
  • Single Stage PFC and Isolated Step Down Converter
  • Continuous or Discontinuous Conduction Mode Operation
  • Average Current Mode Control (ACMC), Fixed Frequency Operation
  • High Accuracy Multiplier Reduces Input Line Harmonics
  • Adjustable Operating Frequency from 20 kHz to 250 kHz
  • These are Pb−Free Devices


  • Improves Efficiency
  • Improves Loop Response
  • Reduces EMI Signature
  • Reduces Acoustic Noise
  • Reduces Input Line Harmonics


  • Notebook Adapter
  • High Current Battery Chargers
  • Front Ends for Distributed Power Systems
  • High Power Solid State Lighting

To learn more about the NCP1652 product family, Click Here



Mfr Part#: NCP1652DWR2G
Mounting Method: Surface Mount
Package Style: SOIC-20W
Available In: REEL

NCP1652 Series 20 V 100 mA Power Factor Correction/Step Down Controller SOIC-20W


Technical Specifications:

Supply Current-Max: Supply Voltage-Max: Duty Cycle-Min: Duty Cycle-Max: Operating Temp Range:
100 mA 20 V 0 % 94 % -40 to +125 °C
See the Download Center for a complete library of supporting documentation.


$1.06 USD (each)
1000+ $1.06

Other quantities & packages (Reels) may also be available


Qty in Stock : 0
Reserve Stock:
Factory Stock: 0
Factory Lead-Time: 2 Weeks
Min. Order Qty: 1,000
Multiple of: 1,000
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