FA5533 FUJI | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 3
Technical content
PFC / PWM Combination IC FA5533/34 under developmentunder developmentunder developmentFeaturesFeaturesFeatures Block DiagramBlock DiagramBlock Diagram
- Critical mode Power Factor Correction and PWM are combined : suitable for smaller power supply
- Internal start-up circuit with 500V rating and low frequency operation achieves 340mW input at no load when PFC stops.
- Small Output Capacitance : Linearly reduced frequency for light load makes small ripple voltage.
- PFC stops below half load ( only for FA5533 )
- Vcc rating 28V allows no series regulator for auxiliary winding to clamp Vcc voltage.
- Adjustable Soft Start time
- Auto-Restart Over Load Protection
- Auto-Restart Over-Voltage Protection for Vcc
- Adjustable Start-up sequence for PFC and PWM: easy Full Load Start-up
- Brown-Out below 70Vac and 70Vdc of PFC Output
- 16 pins package ( DIP/SO ) PFC_ FB COMP MUL MUL AC PFC_ IS ZCD ZCD LIGHT_ LOAD R Q S TIMERR R OVP LV RESTART UVLO PFC_ REG_ OK LIGHT_ LOAD PFC_ OUT VCC VHSTART REG_ PFC REG_ PWM ERR OVP PFC_ REG_ OK PWM_ REG_ OK LIGHT_ LOAD offon on PWM_ FB CS Dma PWM RESTART UVLO PWM_ REG_ OK PWM_ OUT R Q SQT CLR OSCVCO FOSC Q T PWM_ IS delay PWM_ REG slope VCC RESTART PWM_ REG PWM LIGHT_ LOAD LIGHT_ LOAD 1shot GND VCC RESTART Overload LV PWM OVP PWM section PFC section Overvoltage detection LV LV PWM_ DELAY UVLO_ VCC UVLO_ AC UVLO_ AC UVLO_ AC AC detect UVLO_ AC UVLO 1shot Common section ACD Usage : Notebook PC, LCD Monitor, LCD-TV, Laser Beam Printer etc.
PFC / PWM Combination IC FA5533/34 under development PFC se ction PWM se ctionPFC section PWM section Application CircuitApplication CircuitApplication Circuit under developmentunder development
PFC / PWM Combination IC FA5533/34 under development AC lin e voltage Vc c voltage PF C OU TPUT (drive) PF C out put voltage Output voltage PW M OU TPUT (drive) CS p in 0.5V 5m s 5ms PF C OUT PUT (drive) PF C output voltage Output voltage PW M OUT PUT (drive) Full load Light load Full load AC lin e voltage Vc c voltage PF C OU TPUT (drive) PF C out put voltage Output voltage PW M OU TPUT (drive) 70V dc Heavy Load → Light Load → Heavy Load Start-up ( Power-ON ) Stop ( Power-OFF ) Gate of PFC MOSFET PFC OUTPUT voltage Gate of PWM MOSFET PWM DC OUTPUT Heavy Load Heavy Load Light Load AC Line voltage VCC pin voltage Gate of PFC MOSFET PFC OUTPUT voltage CS pin voltage Gate of PWM MOSFET 0.5V → PWM DC OUTPUT PWM DC OUTPUT Gate of PWM MOSFET PFC OUTPUT voltage Gate of PFC MOSFET VCC pin voltage AC Line voltage Timing Chart ( FA5533 )Timing Chart ( FA5533 )Timing Chart ( FA5533 ) under developmentunder development