Nowadays, Power Factor Correction (PFC) technique is widely researched.They have been prevalently applied in low power SMPS, and are still under research for applying in high power SMPS.

• 作为一项成熟的技术，近些年来已经在小功率开关电源中得到普遍的应用，在大功率开关电源中应用仍处在研究与开发阶段。