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 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 noise is generated and while in the skip cycle mode. The NCP1231 also features an internal latching function that can be used for Overvoltage Protection (OVP). The latch is triggered when the voltage on Pin 8 rises above 4.0 V. During an OVP condition, the output drive pulses are immediately stopped and the NCP1231 stays in the latched off condition until VCC drops below 4.0 V (VCCreset). In addition, Pin 8 also serves as a Brown-Out input which provides the necessary safety feature when the SMPS faces low mains situations.