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FAN4800AUM Datasheet(PDF) 8 Page - Fairchild Semiconductor |
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FAN4800AUM Datasheet(HTML) 8 Page - Fairchild Semiconductor |
8 / 20 page © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN4800AU/CU • Rev. 1.0.0 8 Electrical Characteristics (Continued) Unless otherwise noted, VDD=15V, TA= 25°C, TA=TJ, RT=6.8kΩ, and CT=1000pF. Symbol Parameter Condition Min. Typ. Max. Unit Voltage Error Amplifier VREF Reference Voltage 2.45 2.50 2.55 V AV Open-Loop Gain (3) 35 42 dB Gmv Transconductance VNONINV=VINV, VVEA=3.75V 50 70 90 µmho IFBPFC-L Maximum Source Current VFBPFC=2V, VVEA=1.5V 40 50 µA IFBPFC-H Maximum Sink Current VFBPFC=3V, VVEA=6V -50 -40 µA IBS Input Bias Current -1 1 µA VVEA-H Output High Voltage on VVEA 5.8 6.0 V VVEA-L Output Low Voltage on VVEA 0.1 0.4 V Current Error Amplifier GmI Transconductance VNONINV=VINV, VIEA=3.75V 70 88 105 µmho VOFFSET Input Offset voltage VVEA=0V, IAC Open -10 10 mV VIEA-H Output High Voltage 6.8 7.4 7.8 V VIEA-L Output Low Voltage 0.1 0.4 V IL Source Current VISENSE= -0.6V, VIEA=1.5V 35 50 µA IH Sink Current VISENSE= +0.6V, VIEA=4.0V -50 -35 µA AI Open-Loop Gain (3) 40 50 dB TriFault Detect™ tFBPFC-OPEN Time to FBPFC Open VFBPFC=VPFC-UVP to FBPFC OPEN, 470pF from FBPFC to GND 2 4 ms VPFC-UVP PFC Feedback Under-Voltage Protection 0.4 0.5 0.6 V Gain Modulator IAC Input for AC Current (3) Multiplier Linear Range 0 65 µA GAIN Gain Modulator (4) IAC=17.67µA, VRMS=1.080V VFBPFC=2.25V 7.94 IAC=20µA, VRMS=1.224V VFBPFC=2.25V 7.02 IAC=25.69µA, VRMS=1.585V VFBPFC=2.25V 4.18 IAC=51.62µA, VRMS=3.169V VFBPFC=2.25V 1.05 IAC=62.23µA, VRMS=3.803V VFBPFC=2.25V 0.73 BW Bandwidth (3) IAC=40µA 2 kHz VO(gm) Output Voltage=5.7kΩ × (ISENSE-IOFFSET) IAC=50µA, VRMS=1.224V VFBPFC=2.25V 0.76 0.80 0.84 V PFC ILIMIT Comparator VPFC-ILIMIT Peak Current Limit Threshold Voltage, Cycle-by-Cycle Limit -1.2 -1.3 -1.4 V △ VPK PFC ILIMIT-Gain Modulator Output IAC=17.67µA, VRMS=1.08V VFBPFC=2.25V 400 mV Continued on the following page… |
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