The NCP1230 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 a compact 8−pin package (SOIC−8, SOIC−7, or PDIP−7), the NCP1230 contains all needed control functionality to build a rugged and efficient power supply. The NCP1230 is a current mode controller with internal ramp compensation. Among the unique features offered by the NCP1230 is an event management scheme that can disable the front−end PFC circuit during standby, thus reducing the no load power consumption.
Features
•Current−Mode Operation with Internal Ramp Compensation
•Internal High−Voltage Startup Current Source for Loss−Less Startup
•Extremely Low No−Load Standby Power
•Skip−Cycle Capability at Low Peak Currents
•Direct Connection to PFC Controller for Improved No−Load Standby Power
•Internal 2.5 ms Soft−Start
•Internal Leading Edge Blanking
•Latched Primary Overcurrent and Overvoltage Protection
•Short−Circuit Protection Independent of Auxiliary Level
•Internal Frequency Jittering for Improved EMI Signature
•+500 mA/−800 mA Peak Current Drive Capability
•Available in Three Frequency Options: 65 kHz, 100 kHz, and 133 kHz
•Direct Optocoupler Connection
•SPICE Models Available for TRANsient and AC Analysis
