© Semiconductor Components Industries, LLC, 2009

July, 2009 − Rev. 0

1

Publication Order Number:

NCP1294/D

NCP1294

Flyback, Boost, Forward

PWM Controller

The NCP1294 fixed frequency feed forward voltage mode PWM

controller contains all of the features necessary to be configured in a

Flyback, Boost or Forward topology. This PWM controller has been

optimized for high frequency primary side control operation. In

addition, this device includes such features as: Soft−Start, accurate

duty cycle limit control, less than 50

mA startup current, over and

undervoltage protection, and bidirectional synchronization. The

NCP1294 is available in a 16 lead SOIC narrow surface mount

package.

Features

Compliant

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

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

1

16

COMP

SS

OV

LGND

UV

FF

SYNC

PGND

GATE

PIN CONNECTIONS AND

MARKING DIAGRAM

1

16

http://onsemi.com

Device

Package

ORDERING INFORMATION

NCP1294EDR2G

SOIC−16

(Pb−Free)

2500 Tape & Reel

†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.

NCP1294EDBR2G TSSOP−16

(Pb−Free)

SOIC−16

D SUFFIX

CASE 751B

1

16

TSSOP−16

DB SUFFIX

CASE 948F

NCP1294= Specific Device Code

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

G or G = Pb−Free Package

NCP

1294

ALYW

G

1

16

2500 Tape & Reel