Abstract
This thesis introduces some type of the power converters and themechanism of power factor correction (PFC) circuits; and present the study and implementation of digital power factor correction circuit that uses TSMCCMOS 0.35 um technology to realize PFC circuit. With the growing of VLSI technology, the development of industry and electronic products all need more reliable, cheap and intelligent power control system. How to control several watts even tens of kilowatts power transformation without consuming too much energy during transforming is the topic for scholars to study and implementation. In the other word, how to use energy efficiently will be an aim to power electronics. PFC circuits play an important role to improve the efficiency and to minimize the power pollution .When people pay attention to environmental protection, some people also care about the pollution about power system. Many countries in Europe and North America make some standards to constrain some power products, IEEE 519 and IEC 1000-3-6 for example. PFC circuit can achieve high power correction factor and minimize the total harmonic distortion, so nowadays many powerproducts include the PFC function in them. Many IC design concepts base on digital and analog circuits, these two types both have advantages and disadvantages. The PFC circuits are also divided into two types---digital and analog. This thesis will compare these two types, and combine some advantages of digital and analog circuits to realize the PFC circuit. Because the majority of the PFC circuit is digital, it still called ‘digital PFC circuit’. Finally, this work uses TSMC CMOS 0.35 um technology to simulate PFC circuit, then the power factor achieves 0.999 and total harmonic distortion achieves 2.09% when full loading.