• LT1249CN8 PDIP-8
LT1249CN8 PDIP-8


PFC IC Average Current 100kHz 8-PDIP


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  • Part Number : LT1249CN8

  • Package/Case : PDIP-8

  • Brands : ADI

  • Components Categories : Power Factor Correction - PFC

  • Datesheet : LT1249CN8 DataSheet (PDF)

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Overview of LT1249CN8

The LT1249CN8 is a high-performance Power Factor Correction (PFC) integrated circuit designed to enhance power efficiency in electronic systems. It ensures a high power factor by actively adjusting the input current waveforms, making it an ideal solution for applications requiring compliance with power quality standards.


Detailed Pin Description:

  • Pin 1 (VIN): Input Voltage.
  • Pin 2 (RTN): Ground Reference.
  • Pin 3 (IAC): AC Current Sense Input.
  • Pin 4 (VAC): AC Voltage Sense Input.
  • Pin 5 (VCC): Power Supply Voltage.
  • Pin 6 (COMP): Compensation Pin for Feedback Loop.
  • Pin 7 (FB): Feedback Pin.
  • Pin 8 (OUT): PFC Output.

Note: The pin configuration above is a general representation. Refer to the specific datasheet for precise details.

Circuit Diagram

[Include a simple circuit diagram showcasing the LT1249CN8 in a typical Power Factor Correction application.]


Key Features

  • Active Power Factor Correction: Improves power factor for enhanced efficiency.
  • Wide Input Voltage Range: Suitable for a variety of input voltage levels.
  • Internal Compensation: Simplifies external circuitry for ease of design.
  • Overvoltage Protection: Ensures robust performance under varying conditions.

Note: Comprehensive technical details can be available in the LT1249CN8 datasheet.


  • Switched Mode Power Supplies (SMPS): Used in power supplies to improve power factor.
  • LED Drivers: Enhances power efficiency in LED lighting applications.
  • Motor Drives: Ensures efficient power transfer in motor control circuits.


The LT1249CN8 actively corrects the power factor by adjusting the input current waveform to be in phase with the input voltage, resulting in improved overall power efficiency.


LT1249CS8: Surface-mount version with similar specifications.
L6562: Alternative PFC controller suitable for similar applications.

Usage Guide

  • Refer to the official datasheet for comprehensive technical details.
  • Implement the recommended external components for optimal performance.

Frequently Asked Questions

Q: What is the recommended input voltage for the LT1249CN8?
A: Refer to the datasheet for information on the recommended input voltage range.

Q: Is external compensation required for this PFC controller?
A: The LT1249CN8 features internal compensation, but refer to the datasheet for specific details.


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Source Content uid LT1249CN8 Rohs Code No
Part Life Cycle Code Transferred Ihs Manufacturer LINEAR TECHNOLOGY CORP
Part Package Code DIP Package Description DIP, DIP8,.3
Pin Count 8 Manufacturer Package Code N
Reach Compliance Code not_compliant ECCN Code EAR99
HTS Code 8542.39.00.01 Analog IC - Other Type POWER FACTOR CONTROLLER
Input Voltage-Max 25 V Input Voltage-Min 11.5 V
JESD-30 Code R-PDIP-T8 JESD-609 Code e0
Moisture Sensitivity Level 1 Number of Functions 1
Number of Terminals 8 Operating Temperature-Max 100 °C
Operating Temperature-Min Output Current-Max 1.5 A
Output Voltage-Nom 7.5 V Package Body Material PLASTIC/EPOXY
Package Code DIP Package Equivalence Code DIP8,.3
Package Shape RECTANGULAR Package Style IN-LINE
Qualification Status Not Qualified Seated Height-Max 3.937 mm
Supply Current-Max (Isup) 12 mA Surface Mount NO
Switcher Configuration SINGLE Switching Frequency-Max 100 kHz
Technology BIPOLAR Temperature Grade OTHER
Terminal Finish TIN LEAD Terminal Form THROUGH-HOLE
Terminal Pitch 2.54 mm Terminal Position DUAL
Width 7.62 mm

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