NCP1618 Multimode Power Factor Correction IC onsemi NCP1618 Multimode Power Factor Correction (PFC) IC is a high voltage controller with transitions from one operation mode to another. This IC circuit can enter the soft-SKIP mode for minimized losses in very light-load conditions. The NCP1618 PFC IC is housed in a SO-9 package. This IC circuit incorporates the features necessary for robust and compact PFC stages with few external components. Applications include PC power supplies and all off-line appliances requiring power factor correction.