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FAN4800AFSCN/a450avaiPFC + PWM Controller Combo


FAN4800A ,PFC + PWM Controller ComboFeatures Description The highly integrated FAN4800A/C and FAN4801/02/2L  Pin-to-Pin Compatible wi ..
FAN4800ASNY , PFC/PWM Controller Combination
FAN4800C ,PFC + PWM Controller CombinationFeatures Description The highly integrated FAN4800A/C and FAN4801/02/2L  Pin-to-Pin Compatible wi ..
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FAN4803 ,8-Pin PFC and PWM Controller ComboBlock Diagram7VCCPFC OFF REF VVEAO REF7V +V OVP4COMP CC+– 17.5VGNDCOMP–16.2V 235µ AM3–1M4PFC PFC OU ..
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FIN1001M5X ,3.3V LVDS 1-Bit High Speed Differential DriverFeaturesThis single driver is designed for high speed interconnects

FAN4800A
PFC + PWM Controller Combo
FAN4800A/C, FAN4801/02/02L — PFC/PWM Controller Combination January 2011 FAN4800A/C, FAN4801/02/02L PFC/PWM Controller Combination Features Description The highly integrated FAN4800A/C and FAN4801/02/2L  Pin-to-Pin Compatible with ML4800 and FAN4800 are specially designed for power supplies that consist of and CM6800 and CM6800A boost PFC and PWM. They require very few external  PWM Configurable for Current-Mode or components to achieve versatile protections / Feed-forward Voltage-Mode Operation compensation. They are available in 16-pin DIP and SOP packages.  Internally Synchronized Leading-Edge PFC and Trailing-Edge PWM in one IC The PWM can be used in either current or voltage mode. In voltage mode, feed-forward from the PFC  Low Operating Current output bus can reduce the secondary output ripple.  Innovative Switching-Charge Multiplier Divider Compared with older productions, ML4800 and  Average-Current-Mode for Input-Current Shaping FAN4800, FAN4800A/C and FAN4801/02/02L have lower operation current that save power consumption in  PFC Over-Voltage and Under-Voltage Protections external devices. FAN4800A/C and FAN4801/1S/2/2L  PFC Feedback Open-Loop Protection have accurate 49.9% maximum duty of PWM that makes the hold-up time longer. Brownout protection and  Peak Current Limiting for PFC PFC soft-start functions are not in ML4800 and  Cycle-by-Cycle Current Limiting for PWM FAN4800.  Power-On Sequence Control and Soft-Start To evaluate FAN4800A/C, FAN4801/02/2L for replacing existing FAN4800 and ML4800 boards, five things must  Brownout Protection be completed before the fine-tuning procedure:  Interleaved PFC/PWM Switching 1. Change R resister from the old value to a higher AC  FAN4801/02/02L Improve Efficiency at Light Load resister: between 6M to 8M.  f =4•f =4•f for FAN4800A and FAN4801 RTCT PFC PWM 2. Change RT/CT pin from the existing values to  f =4•f =2•f for FAN4800C and R =6.8K and C =1000pF to have f =64KHz, RTCT PFC PWM T T PFC FAN4802/02L f =64KHz. PWM 3. VRMS pin needs to be 1.224V at V =85 V for IN AC universal input application from line input from Applications 85V to 270 V . Both poles for the V of AC AC rms FAN4801/02/02L don’t need to substantially slower  Desktop PC Power Supply than FAN4800; about 5 to 10 times.  Internet Server Power Supply 4. At full load, the average V needs to ~4.5V and the EA  LCD TV, Monitor Power Supply ripple on the V needs to be less than 400mV. EA  UPS 5. Soft-Start pin, the soft-start current has been  Battery Charger reduced to half from the FAN4800 capacitor.  DC Motor Power Supply  Monitor Power Supply Related Resources  Telecom System Power Supply  AN-8027 - FAN480X PFC+PWM Combination Controller Application  Distributed Power © 2008 FAN4800A/C, FAN4801/02/02L • Rev. 1.0.3 1
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