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FAN7311G Datasheet(PDF) 5 Page - Fairchild Semiconductor |
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FAN7311G Datasheet(HTML) 5 Page - Fairchild Semiconductor |
5 / 13 page 5 www.fairchildsemi.com FAN7311 Rev. 1.0.0 Electrical Characteristics For typical values Ta=25 °C, Vcc=12V and for min/max values Ta is the operating ambient temperature range with -25 °C ≤ Ta ≤ 85°C and 5V ≤ Vcc ≤ 25.5V, unless otherwise specified. Characteristics Symbol Test Condition Min. Typ. Max. Unit REFERENCE SECTION ( Recommend X7R Capacitor ) Line Regulation ∆Vref 5 ≤ V CC ≤ 25.5V - 2 25 mV 2.5V Regulation Voltage V25 - 2.45 2.5 2.55 V OSCILLATOR SECTION(MAIN) Oscillation Frequency fosc Ta = 25 °C, Ct = 270pF Rt = 18k 108 115 122 kHz Ct = 270pF, Rt = 18k 106 115 124 CT High Voltage Vcth - - 2.0 - V CT Low Voltage Vctl - - 0.5 - V OSCILLATOR SECTION(BURST) Oscillation Frequency foscb Ctb = 10nF, Rt=18k 195 225 255 Hz BCT High Voltage Vbcth - - 2 - V BCT Low Voltage Vbctl - - 0.5 - V ERROR AMP SECTION Open Loop Gain - - 80 - dB Unit Gain Bandwidth - - 1.5 - MHz Feedback Output High Voltage Veh EA_IN = 0V 2.0 2.27 2.54 V Output Sink Current lsin EA_OUT = 1.5V - - -1 mA Output Source Current lsur EA_OUT = 1.5V 1 - - mA EA_IN Driving Current On OLR Iolr - 75 105 135 uA EA_IN Driving Current On Burst Dimming Iburst - 61 85 109 uA Feedback High Voltage On Burst Dimming Vfbh R(EA_IN) = 60k Ω Va+0.1 Va+0.4 Va+0.7 V SOFT START SECTION Soft Start Current ISS S_S=2V 4 6 8 uA Soft Start Clamping Voltage Vssh - - 5 - V PROTECTION SECTION Open Lamp Protection Voltage 0 Volp0 Start at open lamp 2.2 2.5 2.8 V Open Lamp Protection Voltage 1 Volp1 Normal -> open lamp 1.3 1.5 1.7 V Open Lamp Regulation Voltage Volr - 1.75 2 2.25 V Open Lamp Protection Charging Current Iolp - 0.7 1.4 2.1 uA UNDER VOLTAGE LOCK OUT SECTION Start Threshold Voltage Vth - - - 5 V Start Up Current Ist VCC = Vth-0.2 - 130 180 uA Operating Supply Current Iop VCC = 12V - 1.5 4 mA Stand-by Current Isb VCC = 12V - 200 370 uA ON/OFF SECTION On State Input Voltage Von - 2 - 5 V Off Stage Input Voltage Voff - - - 0.7 V |
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