Low-Standby Power High Performance PWM Controller
●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
●•This is a Pb−Free Device
●Typical Applications
●•High Power AC−DC Adapters for Notebooks, etc.
●•Offline Battery Chargers
●•Set−Top Boxes Power Supplies, TV, Monitors, etc.
