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FAN9612MX Datasheet(PDF) 7 Page - Fairchild Semiconductor |
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FAN9612MX Datasheet(HTML) 7 Page - Fairchild Semiconductor |
7 / 37 page © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN9612 • Rev. 0.9.1E 7 PRELIMINARY Electrical Characteristics Unless otherwise noted, VDD = 12V, TJ = -40°C to +125°C. Currents are defined as positive into the device and negative out of the device. Symbol Parameter Conditions Min. Typ. Max. Unit Supply ISTART_UP Start-up Supply Current VDD = VON – 0.2V 80 110 µA IDD Operating Current Output Not Switching 2.5 4 mA IDD_DYM Dynamic Operating Current (4) fSW = 50 kHz; CLOAD = 2 nF 3 5 mA VON UVLO Start Threshold Voltage VDD Increasing 12 12.5 13 V VOFF UVLO Stop Threshold Voltage VDD Decreasing 7.0 7.5 8.0 V UVLO Hysteresis 5.0 V Bias Regulator (C5VB = 0.1 µF) TA = 25°C; ILOAD = 1 mA 5.0 V V5VB 5VB Output Voltage Total Variation over line, load, and temperature 4.8 5.2 V IOUT_MAX Maximum Output Current 5.0 mA Error Amplifier TA = 25°C (±1.4%) 2.95 3.0 3.05 V Voltage Reference Total Variation over line, load, and temperature (±2.6%) 2.925 3.075 V Line Regulation VDD = 10 V to 18 V 0.1 10 mV VSS Temperature Stability 20 mV IBIAS Input Bias Current VFB = 1V to 3 V; |VSS – VFB| ≤ 0.1 V –0.5 0.5 µA IOUT_SRC Output Source Current VSS = 3 V; VFB = 3.1 V –10 µA IOUT_SINK Output Sink Current VSS = 3V; VFB = 2.9 V 10 µA VOH Output High Voltage 4.5 4.7 V5VB V VOL Output Low Voltage ISINK < 100µA 0.0 0.1 0.2 V gM Transconductance (Note 1) 80 100 120 µmho PWM PWM Ramp Offset TA = 25°C 120 195 270 mV Minimum On-Time VFB > VSS 0.0 µs Maximum On-Time VMOT Maximum On-time Voltage R = 125k 1.23 1.25 1.27 V tON,MAX Maximum On-Time R = 125k; VVIN = 2.5V; VCOMP > 4.5 V; TA = 25°C 4.6 µs Restart Timer (4) (each channel) fSW,RT Minimum Switching Frequency VFB > VPWM_OFFSET 15.5 kHz |
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