NCP1231 Datasheet - ON Semiconductor

NCP1231 Low Standby Power High Performance PWM Controller

Pin No. 1 Pin Name PFC VCC Function Directly powers the PFC front *end stage Pin Description This pin is a direct connection to the VCC pin (Pin 6) via a low impedance switch. In standby and during the startup sequence, the switch is open and the PFC VCC is shutdown. As soon as the aux. windi.

www.DataSheet4U.com NCP1231 Low Standby Power High Performance PWM Controller The NCP1231 represents a major leap towards achieving low standby power in medium to high power Switched Mode Power Supplies such as notebook adapters, off line battery chargers and consumer electronics equipment. Housed in SOIC 8 or PDIP 8, the NCP1231 contains all needed control functionality to build a rugged and efficient power supply. Among the unique featur.

NCP1231 Features

* offered by the NCP1231 is an event management scheme that can disable the front

* end PFC circuit during standby, thus reducing the no load power consumption. The NCP1231 itself goes into cycle skipping at light loads while limiting peak current (to 25% of nominal peak) so that no acoustic noi

NCP1231_ONSemiconductor.pdf