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LT1249CN8

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IC PFC CTRLR AVERAGE CURR

Manufacturer : Analog Devices, Inc
Package/Case : DIP-8
Product Categories : PMIC - PFC (Power Factor Correction)
Datasheet: LT1249CN8 Datasheet (PDF)
RoHs Status: Lead free/RoHS Compliant
In-stock: 4

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LT1249CN8 Product Details

The 8-pin LT1249CN8 provides active power factor correction for universal offline power systems with very few external parts. By using fixed high frequency PWM current averaging without the need for slope compensation, the LT1249CN8 achieves far lower line current distortion, with a smaller magnetic element than systems that use either peak current detection or zero current switching approach, in both continuous and discontinuous modes of operation.

The LT1249CN8 uses a multiplier containing a square gain function from the voltage amplifier to reduce the AC gain at light output load and thus maintains low line current distortion and high system stability. The LT1249CN8 also provides filtering capability to reject line switching noise which can cause instability when fed into the multiplier. Line current dead zone is minimized with low bias voltage at the current input to the multiplier.

The LT1249CN8 provides many protection features including peak current limiting and overvoltage protection. The switching frequency is internally set at 100kHz.

While the LT1249CN8 simplifies PFC design with minimal parts count, the LT1248 provides flexibilities in switching frequency, overvoltage and current limit.

LT1249CN8

Feature

  • Standard 8-Pin Packages
  • High Power Factor Over Wide Load Range with Line Current Averaging
  • International Operation Without Switches
  • Instantaneous Overvoltage Protection
  • Minimal Line Current Dead Zone
  • Typical 250µA Start-Up Supply Current
  • Rejects Line Switching Noise
  • Synchronization Capability
  • Low Quiescent Current: 9mA
  • Fast 1.5A Peak Current Gate Driver

Applications

  • Universal Power Factor Corrected Power Supplies
  • Preregulators up to 1500W

LT1249CN8 Block Diagram
(Picture: Diagram)

Technical Parameters

  • Min Operating Thresholdtyp | V
  • 15.5
  • Vin Range
  • 11.5V to 25V
  • Frequencytyp | Hz
  • 200k
  • Features
  • Active PFC
  • Comments
  • Power Factor Controller
  • Isupplytyp | A
  • 1.5m

LT1249CN8 Datasheet

  • LT1249 Technical Documentation/Data sheet

LT1249CN8 Related Products

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1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.

FAQ:

Q: How does Jotrin guarantee that LT1249CN8 is the original manufacturer or agent of ADI?
We have a professional business development department to strictly test and verify the qualifications of ADI original manufacturers and agents. All ADI suppliers must pass the qualification review before they can publish their LT1249CN8 devices; we pay more attention to the channels and quality of LT1249CN8 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of LT1249CN8 chips? Including ADI original factory information, PMIC - PFC (Power Factor Correction) application, LT1249CN8 pictures?
You can use Jotrin's intelligent search engine, or filter by Power Control ; Offline Controllers/PFC category, or find it through Analog Devices, Inc Information page.
Q: Are the ADI's LT1249CN8 price and stock displayed on the platform accurate?
The ADI's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for LT1249CN8, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of LT1249CN8?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LT1249CN8 we delivered, we will accept the replacement or return of the LT1249CN8 only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of LT1249CN8.
(3)The LT1249CN8 is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
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Analog Devices, Inc

ADI
Analog Devices, Inc. was founded by two MIT graduates, Ray Stata and Matthew Lorber in 1965. The same year, the company released its first product, the model 101 op amp, which was a hockey-puck sized module used in test and measurement equipment. In 1967, the company published the first issue of its...
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