PFC/PWM Controller Combination 16-Pin SOIC N T/R

The highly integrated FAN4800A 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, FAN4800A/C have lower operation current that save power consumption in external devices. FAN4800A 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