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FAN7311 Datasheet(PDF) 5 Page - Fairchild Semiconductor |
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FAN7311 Datasheet(HTML) 5 Page - Fairchild Semiconductor |
5 / 16 page © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7311 Rev. 1.0.6 5 Electrical Characteristics For typical values, TA=25°C and VIN=12V. For min. and max. values, TA is the operating ambient temperature range with -25°C ≤ TA ≤ 85°C and 5V ≤ VIN ≤ 25.5V, unless otherwise specified. Specifications from -25°C to 85°C are guar- anteed by design based on final characterization results. Note: 3. These parameters, although guaranteed, are not 100% tested in production. Symbol Characteristics Test Condition Min. Typ. Max. Unit REFERENCE SECTION (Recommend X7R Capacitor) Δ Vref Line Regulation 5 ≤ VIN ≤ 25.5V 2 25 mV V25 2.5V Regulation Voltage 2.45 2.50 2.55 V OSCILLATOR SECTION (MAIN) fosc Oscillation Frequency TA = 25°C, CT = 270pF, RT = 18kΩ 110.4 115.0 119.6 kHz CT = 270pF, RT = 18kΩ 108 115 122 Vcth CT High Voltage 2.0 V Vctl CT Low Voltage 0.5 V OSCILLATOR SECTION (BURST) foscb Oscillation Frequency TA = 25°C, CTB = 10nF, RT=18kΩ 209.25 225.00 240.75 Hz CTB = 10nF, RT=18kΩ 206.25 225.00 241.75 Vbcth BCT High Voltage 2 V Vbctl BCT Low Voltage 0.5 V ERROR AMP SECTION Av Open Loop Gain(3) 80 dB GBW Unit Gain Bandwidth(3) 1.5 MHz Veh Feedback Output High Voltage EA_IN = 0V 2.00 2.27 2.54 V lsin Output Sink Current EA_OUT = 1.5V -1 mA lsur Output Source Current EA_OUT = 1.5V 1 mA Iolr EA_IN Driving Current on OLR 75 105 135 µA Iburst EA_IN Driving Current on Burst Dimming 61 85 109 µA Vfbh Feedback High Voltage on Burst Dimming R(EA_IN) = 60kΩ Va+0.1 Va+0.4 Va+0.7 V SOFT-START SECTION ISS Soft-Start Current S_S=1V 4 6 8 µA Vssh Soft-Start Clamping Voltage(3) 4V PROTECTION SECTION Volp0 Open-Lamp Protection Voltage 0 Start at open lamp 2.2 2.5 2.8 V Volp1 Open-Lamp Protection Voltage 1 Normal -> open lamp 1.3 1.5 1.7 V Volr Open-Lamp Regulation Voltage 1.75 2.00 2.25 V Iolp Open-Lamp Protection Charging Current 0.7 1.4 2.1 µA UNDER-VOLTAGE LOCKOUT SECTION Vth Start Threshold Voltage 5 V Ist Startup Current VIN = Vth-0.2 130 180 µA Iop Operating Supply Current VIN = 12V 1.5 4.0 mA Isb Stand-by Current VIN = 12V 200 370 µA |
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