AN667设计与L6560 /一个过渡模式IC开关催功率因数前置稳压器 APPLICATION NOTE DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR WITH THE L6560/A TRANSITION MODE I.C. by G. Comandatore and U. Moriconi Active power factor correction techniques are going to grow in conversion applications. Market inter- est (legislation to be considered) is also moving towards fairly low (36-150W) conversion power ranges (lighting, monitor). This paper describes an "easy to use" 8 Pin Controller that allows the realization of very low cost off- line Power Factor Correction. Introduction Switching at a frequency much higher than the ……