欧美黄色大片久久tv_中国一级黄色毛片视频_黄色视频在线有限_婷婷五月天青青草91_中日韩激情一级无码免费毛片_国产丝袜视频_日韩不卡aⅴ在线播放_亚洲天天成人一区二区_免费欧美成人影院_精品三级 欧美国产

The SC3201 is a Power Factor Correction (PFC) controller which is applied to boost converter. It features High performance by using multi-mode control strategy. At heavy load or full load, it operates in Critical conduction Mode (CrM). When load decreases, it operates in Discontinuous Conduction Mode (DCM) with valley switching and lower frequency for high efficiency. And at no load, the IC will operate in Burst Mode to reduce power consumption and minimize audio noise. Using SC3201 together with the Flyback controller and secondary synchronous rectifier controller, high efficiency over full load can be achieved, and extremely low standby power consumption of system can easily meet the efficiency regulations. Benefit from the SC3201，the PFC stage will obtain nearly unity power factor and sinusoidal line input current with few external components. SC3201 offers comprehensive protections to prevent the circuit from damage under abnormal conditions.