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.

Manufacturer	onsemi
Product Category	AC DC Converters, Offline Switchers
Series	-
Packaging	Tube
Package-Case	8-DIP (0.300", 7.62mm), 7 Leads
Operating-Temperature	-40°C ~ 125°C (TJ)
Mounting-Type	Through Hole
Supplier-Device-Package	7-PDIP
Watt	-
Output-Isolation	Isolated
Internal-Switch-s	No
Voltage-Breakdown	-
Topology	Flyback
Voltage-Start-Up	12.6V
Voltage-Supply-Vcc-Vdd	7.7 V ~ 18 V
Duty-Cycle	80%
Frequency-Switching	65kHz
Fault-Protection	Current Limiting, Over Temperature, Over Voltage, Short Circuit
Control-Features	-