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NCP1927: PFC and Flyback Controller for Flat Panel TVs

Datasheet: NCP1927: Combination Power Factor Correction Controller and Flyback Controller for Flat Panel TV
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Product Overview
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This combination IC integrates the primary side control blocks - power factor correction (PFC) and flyback controllers with sequencing circuitry - necessary to implement a compact highly efficient Flat Panel TV Switched Mode Power Supply.
The PFC controller exhibits near-unity power factor while operating in Critical Conduction Mode (CrM) with an internal frequency clamp. The circuit incorporates all the features necessary for building a robust and compact PFC stage while minimizing the number of external components.
The fixed-frequency current-mode flyback controller features a proprietary Soft-Skip™ mode combined with frequency foldback allowing excellent efficiency during light load conditions while achieving very low standby power consumption. Soft-Skip™ dramatically reduces the risk of acoustic noise, therefore allowing the use of inexpensive transformers and capacitors in the clamping network. Frequency jittering and ramp compensation make this controller and excellent fit for converters where ruggedness and components cost are the key constraints.
Features   Benefits
  • Inverter Enable Output
  • Can be used to signal backlight inverter turn-on
  • Shutdown Pin to Disable IC
  • Easy system design
  • Go To Standby Input
  • Disables the PFC in light load for increased efficiency
  • PFC Skip Mode
  • Increased efficiency during light load conditions
  • Programmable Overvoltage/Undervoltage Protection
  • Increased robustness
  • Flyback Frequency Jittering
  • Softened EMI signature
  • Flyback Frequency Foldback
  • Improved light load efficiency
  • Timer-Based Overload Protection with Auto-Recovery
  • Increased Robustness
  • Flyback Soft-Skip
  • Improved performance in Standby, reduces the risk of acoustic noise
Applications   End Products
  • Flat TV power supplies
  • LCD TV
Technical Documentation & Design Resources
Data Sheets (1) FAQ (1)
Package Drawings (1)  
Budgetary Price/Unit
Case Outline
NCP1927DR2G Obsolete
Halide free
NCP1927 SOIC-16 751B-05 1 260 Tape and Reel 2500  
Market Leadtime (weeks) : Contact Factory
Case Outlines
NCP1927: PFC and Flyback Controller for Flat Panel TVs
NCP1927: PFC and Flyback Controller for Flat Panel TVs
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