NCP1652 High-Efficiency SingleStage Power Factor Correction and Step-DownController

ï›› to reduce acoustic noise at light loads. Otherfeatures found in the NCP1652 include a high voltage startup circuit, voltage feedforward, brown out detector, internal overload timer, latchinput and a high accuracy multiplier. The NCP1652 is a highly integrated controller for implementingpower factor correction (PFC) and isolated step down acdc power conversion in a single stage, resulting in a lower cost and reduced partcount solution. This controller is ideal for notebook adapters, battery chargers and other offline 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 asecondary 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 SoftSkip
http://onsemi.com MARKINGDIAGRAMS 201NCP1652AWLYYWWG SO20 WBDW SUFFIXCASE 751D NCP1652GAWLYWW SOIC16D SUFFIXCASE 751B Features

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Dual Control Outputs with Adjustable Non Overlap Delay forDriving a Synchronous Rectifier Switch, an Active Clamp Switch orBoth
A= Assembly Location WL= Wafer LotYY= YearWW= Work WeekG= PbFree Package

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Voltage Feedforward Improves Loop Response

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Frequency Jittering Reduces EMI Signature

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Proprietary SoftSkip ï›› at Light Loads Reduces Acoustic Noise
ORDERING INFORMATION

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Brown Out Detector
See detailed ordering and shipping information in the packagedimensions section on page 32 of this data sheet.

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Internal 150 ms Fault Timer

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Independent LatchOff Input Facilitates Implementation ofOvervoltage and Overtemperature Fault Detectors

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Single Stage PFC and Isolated Step Down Converter

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Continuous or Discontinuous Conduction Mode Operation

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Average Current Mode Control (ACMC), Fixed Frequency Operation

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High Accuracy Multiplier Reduces Input Line Harmonics

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Adjustable Operating Frequency from 20 kHz to 250 kHz

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These are PbFree Devices
Typical Applications

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Notebook Adapter

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High Current Battery Chargers

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Front Ends for Distributed Power Systems

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High Power Solid State Lighting
 Semiconductor Components Industries, LLC, 2008 Publication Order Number: June, 2008 Rev. 01 NCP1652/D