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FA3641N Datasheet(PDF) 3 Page - Fuji Electric |
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FA3641N Datasheet(HTML) 3 Page - Fuji Electric |
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3 / 21 page  FA3641P(N), FA3647P(N) 60 s Electrical characteristics (Vcc=18V, RT=47k Ω, Ta=25˚C) Reference voltage section Oscillator section Item Symbol Test condition Min. Typ. Max. Unit Oscillation frequency fOSC RT=47k Ω, Tj=25˚C 92.6 100 107.4 kHz Frequency variation 1 (Voltage stability) fdV VCC=10 to 28V ±1.6 % Frequency variation 2 (Temperature stability) fdT Ta= –30 to +85 °C ±0.02 % / °C s Recommended operating condition Item Symbol Min. Typ. Max. Unit Supply voltage VCC 10 28 V REF pin bypass capacitor Cref 0.1 0.47 µF Soft-start capacitor CS 0.01 1 µF Oscillation frequency (FB >1.2V) fOSC 30 500 kHz Min.oscillation frequency at light load mode (FB <1.2V) fOSCL 10 kHz Item Symbol Test condition Min. Typ. Max. Unit Reference voltage VREF Tj=25˚C 4.75 5.00 5.25 V Voltage variation 1 (Line regulation) VdV VCC=10 to 28V ±6 ±20 mV Voltage variation 2 (Load regulation)) VdV IL=0 to 10mA, Vcc=18V ±6 ±20 mV Voltage variation 3 (Temperature stability) VdT Ta= –30 to +85 °C ±0.5 mV/ °C Pulse width modulation circuit section Item Symbol Test condition Min. Typ. Max. Unit FB pin source current IFB VFB=0V –985 –750 –615 µA Input threshold voltage (FB pin) VTH FBO Duty cycle =0% 0.95 1.03 V VTH FBM Duty cycle = DMAX 2.40 V Maximum duty cycle DMAX VFB=2.5V 66 70 74 % Reducing oscillation frequency section Item Symbol Test condition Min. Typ. Max. Unit FB pin threshold voltage VTH FBS 1.18 V Frequency reduction k fS1 VFB=1.10 to 1.15V 16.7 kHZ Minimum oscillation frequency foscS2 46 kHZ Overcurrent limiting circuit section Item Symbol Test condition FA3641P/N FA3647P/N Unit Min. Typ. Max. Min. Typ. Max. Input threshold voltage (IS pin) VTH IS 215 235 255 –188 –168 –148 mV Input terminal source current (IS pin) I IS VIS =0V –5 –20 µA Delay time TPD IS 150 150 ns Soft-start circuit section Item Symbol Test condition Min. Typ. Max. Unit Charge current (CS pin) ICHG VCS =1V, Tj=25˚C –4.0 –6.5 –9.0 µA Input threshold voltage (CS pin) VTH CSO Duty cycle =0% 0.95 1.03 V VTH CSM Duty cycle = DMAX 2.40 V |
Similar Part No. - FA3641N |
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Similar Description - FA3641N |
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