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NCP1927DR2G

更新时间： 2024-09-19 11:13:07
品牌 Logo 应用领域
安森美 - ONSEMI 功率因数校正电视
页数 文件大小 规格书
24页 613K
描述
PFC and Flyback Controller for Flat Panel TVs

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NCP1927DR2G 数据手册

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NCP1927  
Combination Power Factor  
Correction Controller and  
Flyback Controller for Flat  
Panel TVs  
http://onsemi.com  
MARKING DIAGRAM  
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.  
POVUV  
PFB  
IENABLE  
PSKIP  
PDRV  
VCC  
Shutdown  
PControl  
PCT  
FDRV  
GND  
PZCD  
PCS  
FFB  
SOIC−16  
CASE 751B  
GTS  
FCS  
A
= Assembly Location  
WL = Wafer Lot  
= Year  
WW = Work Week  
Y
G
= Pb−Free Package  
ORDERING INFORMATION  
Common General Features  
• Wide V Range from 10 V to 30 V  
†
CC  
Device  
NCP1927DR2G  
Package  
Shipping  
• Very Low Startup Current Consumption  
(v 20 mA MAX)  
SOIC−16 2500 / Tape & Reel  
(Pb−Free)  
• Inverter Enable Output  
• Shutdown Pin to Disable IC  
• Go To Standby Input  
†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.  
• This is a Pb−Free Device  
PFC Controller Features  
Flyback Controller Features  
• Critical Conduction Mode (CrM) with Constant On  
Time Control  
• Internal Frequency Clamp  
• Skip Mode Operation During Light Load Conditions  
• Fast Line / Load Transient Compensation  
• Accurate and Programmable Maximum On Time  
Control  
• Negative Current Sensing  
• Programmable Overvoltage/Undervoltage Protection  
• 800 mA Source / 1200 mA Sink Gate Drive  
• 65 kHz Fixed−Frequency Operation with Built−In  
Ramp Compensation  
• Frequency Jittering for Softened EMI Signature  
• Frequency Foldback then Soft−Skip for Improved  
Performance in Standby  
• Timer−Based Overload Protection with Auto−Recovery  
• Protection Against Winding Short−Circuit  
• 4 ms Soft−Start Timer  
• 800 mA Source / 1200 mA Sink Gate Drive  
© Semiconductor Components Industries, LLC, 2011  
1
Publication Order Number:  
June, 2011 − Rev. 0  
NCP1927/D  
1234567...24

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