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NCP1927

ON Semiconductor
Part Number NCP1927
Manufacturer ON Semiconductor
Description Combination Power Factor Correction Controller and Flyback Controller
Published Nov 17, 2013
Detailed Description NCP1927 Combination Power Factor Correction Controller and Flyback Controller for Flat Panel TVs This combination IC int...
Datasheet PDF File NCP1927 PDF File

NCP1927
NCP1927

Overview
NCP1927 Combination Power Factor Correction Controller and Flyback Controller for Flat Panel TVs 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 enabling excellent efficiency during light load conditions while achieving very low standby power consumption.
Soft −Skip dramatically reduces the risk of acoustic noise, therefore enabling the use of inexpensive transformers and capacitors in the clamping network.
Frequency jittering and ramp compensation make this controller an excellent fit for converters where ruggedness and component cost are the key constraints.
Common General Features http://onsemi.
com MARKING DIAGRAM POVUV PFB Shutdown PControl PCT PZCD SOIC−16 CASE 751B A WL Y WW G PCS GTS = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package NCP1927 AWLYWWG IENABLE PSKIP PDRV VCC FDRV GND FFB FCS • Wide VCC Range from 10 V to 30 V • Very Low Startup Current Consumption • • • • (v 20 mA MAX) Inverter Enable Output Shutdown Pin to Disable IC Go To Standby Input This is a Pb−Free Device ORDERING INFORMATION Device NCP1927DR2G Package SOIC−16 (Pb−Free) Shipping† 2500 / Tape & Reel †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.
PFC Controller Features • Critical Conduction Mode (CrM) with Constant On • • • • • • • Flyback Controller Fea...


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