FAN4802NY

The highly integrated FAN4802 is specially designed for power supplies that consist of boost PFC and PWM. They require very few external components to achieve versatile protections / compensation. They are available in 16-pin DIP and SOP packages. The PWM can be used in either current or voltage mode. In voltage mode, feed-forward from the PFC output bus can reduce the secondary output ripple. Compared with older productions, ML4800 and FAN4800, FAN4802 have lower operation current that save power consumption in external devices. FAN4802 have accurate 49.9% maximum duty of PWM that makes the hold-up time longer. Specifically, the brownout protection and PFC soft-start functions are not in ML4800 and FAN4800.

• Pin-to-Pin Compatible with ML4800
• PWM Configurable for Current-mode or Feed-forward Voltage-Mode Operation
• Internally Synchronized Leading-Edge PFC and Trailing-Edge PWM in one IC
• Low Operating Current
• Innovative Switching-Charge Multiplier Divider
• Average-Current-Mode for Input-Current Shaping
• PFC Over-Voltage and Under-Voltage Protections
• PFC Feedback Open-Loop Protection
• Cycle-by-Cycle Current Limiting for PFC/PWM
• Power-on Sequence Control and Soft-Start
• Brownout Protection
• Interleaved PFC/PWM Switching
• FAN4801/1S/2/2L Improve Efficiency at Light Load
• fRTCT=4
• fPFC=4
• fPWM for FAN4800A and FAN4801/1S
• fRTCT=4
• fPFC=2
• fPWM for FAN4800C andFAN4802/2L