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NCP1651

ON
Part Number NCP1651
Manufacturer ON
Description Single Stage Power Factor Controller
Published May 12, 2005
Detailed Description NCP1651 Single Stage Power Factor Controller The NCP1651 is an active, power factor correction controller that can oper...
Datasheet PDF File NCP1651 PDF File

NCP1651
NCP1651

Overview
NCP1651 Single Stage Power Factor Controller The NCP1651 is an active, power factor correction controller that can operate over a wide range of input voltages.
It is designed for 50/60 Hz power systems.
It is a fixed frequency controller that can operate in continuous or discontinuous conduction modes.
The NCP1651 provides a low cost, low component count solution for isolated AC−DC converters with mid−high output voltage requirements.
The NCP1651 eases the task of meeting the IEC1000−3−2 harmonic requirements for converters in the range of 50 W − 250 W.
The NCP1651 drives a flyback converter topology to operate in continuous/discontinuous mode and programs the average input current to follow the line voltage in order to provide unity power factor.
By using average current mode control CCM algorithm, the NCP1651 can help provide excellent power factor while limiting the peak primary current.
Also, the fixed frequency operation eases the input filter design.
The NCP1651 uses a proprietary multiplier design that allows for much more accurate operation than with conventional analog multipliers.
Features • Fixed Frequency Operation • Average Current Mode PWM • Internal High Voltage Startup Circuit • Continuous or Discontinuous Mode Operation • High Accuracy Multiplier • Overtemperature Shutdown • External Shutdown • Undervoltage Lockout • Low Cost/Parts Count Solution • Ramp Compensation Does Not Affect Oscillator Accuracy • This is a Pb−Free Device Typical Applications • High Current Battery Chargers • Front Ends for Distributed Power Systems www.
onsemi.
com MARKING DIAGRAM 16 1 SOIC−16 D SUFFIX CASE 751B NCP1651G AWLYWW A = Assembly Location WL = Wafer Lot Y = Year WW = Work Week G = Pb−Free Package PIN CONNECTIONS OUT 1 GND 2 CT 3 RAMP COMP 4 IS+ 5 Iavg−fltr 6 Iavg 7 FB/SD 8 16 STARTUP 15 NC 14 NC 13 VCC 12 Vref 11 AC COMP 10 AC REF 9 AC INPUT (Top View) ORDERING INFORMATION Device Package Shipping† NCP1651DR2G SOIC−16 2500/Tape & Reel (Pb−Free) †For inf...


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