The NCP1606 is an active power factor controller specifically designed for use as a pre−converter in electronic ballasts, ac−dc adapters and other medium power off line converters (typically up to 300 W). It embeds a Critical Conduction Mode (CRM) scheme that substantially exhibits unity power factor across a wide range of input voltages and power levels. Housed in a DIP8 or SOIC−8 package, the NCP1606 minimizes the number of external components. Its integration of comprehensive safety protection features makes it an excellent driver for rugged PFC stages.
●General Features
●• “Unity” Power Factor
●• No Need for Input Voltage Sensing
●• Latching PWM for Cycle by Cycle On Time Control (Voltage Mode)
●• High Precision Voltage Reference (±1.5% over the VCC and Temp. Ranges)
●• Very Low Startup Current Consumption (≤ 40 uA)
●• Low Typical Operating Current (2.1 mA)
●• −500 mA / +800 mA Totem Pole Gate Driver
●• Undervoltage Lockout with Hysteresis
●• Pin to Pin Compatible with Industry Standards
●Safety Features
●• Programmable Overvoltage Protection
●• Protection against Open Loop (Undervoltage Protection)
●• Accurate and Programmable On Time Limitation
●• Overcurrent Limitation
●Typical Applications
●• Electronic Light Ballast
●• AC Adapters, TVs, Monitors
●• All Off Line Appliances Requiring Power Factor Correction
