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reference designNCP1294

Onsemi NCP1294

Flyback, Boost, Forward PWM Controller

Overview

TopologyOther Topology
Switching frequency1000 kHz

Description

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 50A 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
  • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
SamplesAvailability & Sample
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7443556450
SPECWE-HCI SMT Flat Wire High Current Inductor, 4.5 µH, 23.5 A

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance4.5 µH
Performance Rated Current23.5 A
Saturation Current @ 10%16 A
Saturation Current @ 30%37 A
DC Resistance3.4 mΩ
Self Resonant Frequency35 MHz
MaterialWE-PERM 2 
Packaging Unit150 
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