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NCP1294ED16 Datasheet PDF : 13 Pages
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NCP1294
Product Preview
Enhanced Voltage Mode
PWM Controller
The NCP1294 fixed frequency feed forward voltage mode PWM
controller contains all of the features necessary for basic voltage mode
operation. 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 50mA startup current, over and undervoltage protection, and
bidirectional synchronization. The NCP1294 is available in a 16 lead
SOIC narrow surface mount package.
Features
• 1.0 MHz Frequency Capability
• Fixed Frequency Voltage Mode Operation, with Feed Forward
• Thermal Shutdown
• Undervoltage Lock−Out
• Accurate Programmable Max Duty Cycle Limit
• 1.0 A Sink/Source Gate Drive
• Programmable Pulse−By−Pulse Overcurrent Protection
• Leading Edge Current Sense Blanking
• 75 ns Shutdown Propagation Delay
• Programmable Soft−Start
• Undervoltage Protection
• Overvoltage Protection with Programmable Hysteresis
• Bidirectional Synchronization
• 25 ns GATE Rise and Fall Time (1.0 nF Load)
• 3.3 V 3% Reference Voltage Output
• Pb−Free Packages are Available*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2009
1
April, 2009 − Rev. P0
http://onsemi.com
16
1
SOIC−16
D SUFFIX
CASE 751B
TSSOP−16
16
DTB SUFFIX
CASE 948F
1
PIN CONNECTIONS AND
MARKING DIAGRAM
1
GATE
ISENSE
SYNC
FF
UV
OV
16
VC
PGND
VCC
VREF
LGND
SS
RTCT
ISET
COMP
VFB
1
16
NCP1294= Specific Device Code
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G
= Pb−Free Package
ORDERING INFORMATION
Device
Package Shipping†
NCP1294ED16
SOIC−16 48 Units / Rail
NCP1294ED16G
NCP1294EDR16
SOIC−16 48 Units / Rail
(Pb−Free)
SOIC−16 2500 Tape & Reel
NCP1294EDR16G
NCP1294EDTB16G
SOIC−16 2500 Tape & Reel
(Pb−Free)
TSSOP−16 96 Units / Rail
(Pb−Free)
NCP1294EDTB16R2G TSSOP−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:
NCP1294/D
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