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FA3647P Dataheets PDF



Part Number FA3647P
Manufacturers Fuji Electric
Logo Fuji Electric
Description PWM control IC with light load power saving function For Switching Power Supply Control
Datasheet FA3647P DatasheetFA3647P Datasheet (PDF)

FA3641P(N), FA3647P(N) FA3641P(N), FA3647P(N) s Description The FA3641P(N) and FA3647P(N) are the PWM type switching power supply control ICs that can directly drive power MOSFET. These ICs use a CMOS device with high dielectric strength (30V) to implement low power consumption. They feature a number of functions that are equivalent to those of the FA531X series consisting of bipolar devices. In addition, they have a function that reduces the oscillation frequency to suppress loss of the power s.

  FA3647P   FA3647P



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FA3641P(N), FA3647P(N) FA3641P(N), FA3647P(N) s Description The FA3641P(N) and FA3647P(N) are the PWM type switching power supply control ICs that can directly drive power MOSFET. These ICs use a CMOS device with high dielectric strength (30V) to implement low power consumption. They feature a number of functions that are equivalent to those of the FA531X series consisting of bipolar devices. In addition, they have a function that reduces the oscillation frequency to suppress loss of the power supply in light load mode and support an overvoltage protection detecting Vcc voltage. These ICs are most suitable for high-performance, energy-saving power supplies that require low input power in standby or no-load mode. PWM control IC with light load power saving function For Switching Power Supply Control s Dimensions, mm SOP-8 8 5 1 4.9 4 +0.1 –0.05 6.0±0.2 3.9 s Features • Uses a newly developed CMOS process with high dielectric strength (30V) for implementing low power consumption • Standby current of 2µA or less (at Vcc=14V), and operating current of 1.9mA (typ.) • Automatically reduces the oscillation frequency to suppress loss of the power supply in light load mode • Overvoltage protection function detecting Vcc voltage • A drive circuit for connecting a power MOSFET directly • Output peak current: Source current –500mA Sink current +1A • Pulse-by-pulse overcurrent limiting function • Overload cutoff function (latch or non-latch mode selectable) • Output ON/OFF control function by external signal • Latch mode overvoltage shutdown function • Undervoltage lockout function (16.5V ON / 9V OFF) • Reference voltage output (5V) • 8-pin package (DIP/SOP) 0.4±0.1 1.27±0.2 DIP-8 8 5 1 9.3 1.5 4 6.4 3.0min 4.5max 3.3 0~8° 0.25 – 7.62 0~15 ˚ 5˚ 0~1 2.54±0.25 0.46±0.1 58 1.7max +0.1 5 0.0 0.20 FA3641P(N), FA3647P(N) s Block diagram FA3641 FA3647 Pin No. Symbol Function 1 2 3 4 5 6 7 8 RT FB IS (+)/ IS (–) GND OUT VCC REF CS Oscillator timing resistor Feedback Overcurrent detection Ground Output Power supply Description Setting oscillation frequency Input to PWM comparator Input to overcurrent limiting function Ground Output for direct driving a power MOSFET Power supply for IC (5V) Reference voltage Reference voltage output Soft-start and ON/OFF control Soft-start, ON/OFF and latchmode shutdown operations s Absolute maximum ratings (Ta=25˚C) Item Supply voltage Output peak current FB pin input voltage REF pin output current IS pin input voltage CS pin input current Total power dissipation Operating temperature Junction temperature Storage temperature Note: Symbol VCC1 VCC2 IOL IOH VFB IREF VIS ICS Pd Topr Tj Tstg Test condition Low impedance source (Icc >15mA) Internal ZD clamp (Icc < 15mA) Sink current Source current at Ta =25˚C DIP SOP Rating 30 Self limiting +1.0 –0.5 –0.3 to 5.0 –10 –0.3 to 5.0 2.0 800 *1 400 *2 –30 to +85 125 –40 to +150 Unit V V A A V mA V mA mW ˚C ˚C ˚C *1 Derating factor Ta > 25˚C: 8.0mW/˚C *2 Derating f.


FA3647N FA3647P FA365


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