Cirrus-logic AN349 Manual do Utilizador Página 1

Copyright  Cirrus Logic, Inc. 2011(All Rights Reserved)http://www.cirrus.comApplication NoteMIGRATING FROM THE L6562 TO THECS1601 POWER FACTOR CORREC

AN34910 AN349REV1Make changes to the schematic as shown. Note that capacitor C6 can be between pin 1 and GND or pin 1 and VDD, based onrouting conside

AN349AN349REV1 11In almost all fluorescent ballast applications, there are no requirements for light-load efficiency. The most common topology usedfor

AN34912 AN349REV16.6 Noise Issues When Using CS1601 to replace L6562For an existing design using the L6562, attempting to use the CS1601 with the comp

AN349AN349REV1 136.6.2 IFB - Pin 1The filter pole (corner) on pin 1 is calculated by:Fp = 1  (2Rfb Cfb2  Gain) From the L6562 data sheet, we will

AN34914 AN349REV18. Revision HistoryRevision Date ChangesREV1 MAR 2011 Initial Release.Contacting Cirrus Logic SupportFor all product questions and in

AN3492 AN349REV13. Advantages of CS1601 over L6562The CS1601 uses a revolutionary digital algorithm that has significant advantages over the existing

AN349AN349REV1 3near unity power factor across the operating input voltage range. The CS1601-based solutions greatly minimizes the need formaking this

AN3494 AN349REV1Figure 5. Ballast Startup with CS16014. Theory of OperationFigure 4 and Figure 5 are the internal block diagrams of the L6562 and the

AN349AN349REV1 5Figure 7. CS1601 Block DiagramThe basic principle of operation of the L6562 can be summarized as follows:- The L6562 is a CRM control

AN3496 AN349REV1Figure 9 shows the frequency profile across the line voltage for CS1601-based solution.Figure 9. CS1601 Switching Frequency vs. Line

AN349AN349REV1 74.1 Boost Inductor SizeLike the L6562-based designs, the size of the boost inductor when using the CS1601 is determined by the amount

AN3498 AN349REV15. Feature SetThe following tables compare the major feature sets of CS1601 and L6562.5.1 Protection Feature Set5.2 Performance Featur

AN349AN349REV1 96. Migrating an Existing Design to Use the CS16016.1 Footprint CompatibilityThe CS1601 is packaged in the industry-standard 8-pin SOIC