NCP1681ABD2R2G

NCP1681 is a totem pole continuous conduction mode (CCM)/multi-mode (CrM-CCM) power factor correction controller. It is a PFC controller IC designed to drive the bridgeless totem-pole PFC topology. The bridgeless totem-pole PFC is a power factor correction architecture that consists of a fast switching leg driven at the PWM switching frequency and a second leg that operates at the AC line frequency. This topology eliminates the diode bridge present at the input of a conventional PFC circuit, allowing significant improvement in the power stage efficiency. Typical applications are power factor correction, offline power supply, server power, telecom 5G power, networking power, gaming console power supplies, UHD TV power supplies, industrial power supplies.