Fairchild FAN6920MR临界模式PFC电源解决方案
Fairchild公司的FAN6920MR是采用mWSaver技术的集成了临界模式PFC控制器和准谐振电流模式PWM控制器,提供了成本效益的设计和降低了外接元件. FAN6920MR具有谷低检测,绿色模式工作以及高/低火线电压超功率补偿,从而提高了电源系统的性能,主要用在笔记本电脑适配器,开架开关电源和电池充电器.本文介绍了FAN6920MR主要特性,方框图, 典型应用电路图, 设计案例最终电路图,材料清单和PCB布局考虑.
FAN6920MR: mWSaver™ Technology Integrated Critical-Mode PFC and Quasi-Resonant Current-Mode PWM Controller
Factor Correction (PFC) controller and quasi-resonant PWM controller. Integration provides cost-effective design and reduces external components.
For PFC, FAN6920MR uses a controlled on-time technique to provide a regulated DC output voltage and to perform natural power-factor correction. With an innovative THD optimizer, FAN6920MR can reduce input current distortion at zero-crossing duration to
improve THD performance.
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