NCP1618A 是一款创新型多模式功率因数控制器。该电路根据开关周期长度自然地从一种工作模式（CCM、CrM 或 DCM）转换为另一种工作模式，从而优化线路/负载范围内的效率。在非常轻的负载条件下，电路进入软 SKIP 模式以最大限度地减少损耗。该电路采用 SO-9 封装，进一步整合了构建坚固紧凑的 PFC 级所需的功能，并且只需很少的外部元件。评估板是一个 500W 宽电源 PFC 级。

The NCP1618A is an innovative multimode power factor controller. The circuit naturally transitions from one operation mode (CCM, CrM or DCM) to another depending on the switching period duration so that the efficiency is optimized over the line/load range. In very light-load conditions, the circuit enters the soft-SKIP mode for minimized losses. Housed in a SO-9 package, the circuit further incorporates the features necessary for building robust and compact PFC stages, with few external components. The evaluation board is a 500-W wide-mains PFC stage.