© Semiconductor Components Industries, LLC, 2010
April, 2010 − Rev. 3
1 Publication Order Number:
NCP1652/D
NCP1652, NCP1652A
High-Efficiency Single
Stage Power Factor
Correction and Step-Down
Controller
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.
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
Typical Applications
• Notebook Adapter
• High Current Battery Chargers
• Front Ends for Distributed Power Systems
• High Power Solid State Lighting
SO−20 WB
DW SUFFIX
CASE 751D
MARKING
DIAGRAMS
http://onsemi.com
20
1
NCP1652
AWLYYWWG
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
SOIC−16
D SUFFIX
CASE 751B
NCP1652G
AWLYWW
See detailed ordering and shipping information in the package
dimensions section on page 32 of this data sheet.
ORDERING INFORMATION
NCP1652AG
AWLYWW
