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NCP1650

Power Factor Controller

ON Semiconductor 

NCP1650

Power Factor Controller

The NCP1650 is an active, power factor correction controller that

can operate over a wide range of input voltages, and output power

levels. It is designed to operate on 50/60 Hz power systems. This

controller offers several different protection methods to assure safe,

reliable operation under any conditions.

The PWM is a fixed frequency, average current mode controller

with a wide complement of features. These features allow for both

flexibility as well as precision in it’s application to a circuit. Critical

components of the internal circuitry are designed for high accuracy,

which allows for precise power and current limiting, therefore

minimizing the amount of overdesign necessary for the power stage

components.

The NCP1650 is designed with a true power limiting circuit that will

maintain excellent power factor even in constant power mode. It also

contains features that allow for fast transient response to changing

load currents and line voltages.

Features

• Fixed Frequency Operation

• Average Current Mode PWM

• Continuous or Discontinuous Mode Operation

• Fast Line/Load Transient Compensation

• True Power Limiting Circuit

• High Accuracy Multipliers

• Undervoltage Lockout

• Overvoltage Limiting Comparator

• Brown Out Protection

• Ramp Compensation Does Not Affect Oscillator Accuracy

• Operation from 25 to 250 kHz

• Pb−Free Package is Available*

Typical Applications

• Server Power Converters

• Front End for Distributed Power Systems

http://onsemi.com

16

1

SO−16

D SUFFIX

CASE 751B

MARKING DIAGRAM

16

NCP1260G

AWLYWW

1

A

= Assembly Location

WL

= Wafer Lot

Y

= Year

WW

= Work Week

G

= Pb−Free Package

PIN CONNECTIONS

Vin 1

Vref 2

AC COMP 3

AC REF 4

16 OUTPUT

15 GND

14 CT

13 RAMP COMP

AC INPUT 5

FB/SD 6

LOOP COMP 7

PCOMP 8

12 IS−

11 Iavg−fltr

10 Iavg

9 Pmax

(Top View)

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

© Semiconductor Components Industries, LLC, 2005

1

October, 2005 − Rev. 10

ORDERING INFORMATION

Device

Package

Shipping†

NCP1650DR2 SOIC−16 2500/Tape & Reel

NCP1650DR2G SOIC−16 2500/Tape & Reel

(Pb−Free)

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

Publication Order Number:

NCP1650/D

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