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FAN6863WTY Datasheet(PDF) 6 Page - Fairchild Semiconductor |
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FAN6863WTY Datasheet(HTML) 6 Page - Fairchild Semiconductor |
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6 / 16 page  © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6863W • Rev. 1.0.1 6 Electrical Characteristics (Continued) VDD = 15 and TA = 25°C, unless otherwise noted. Symbol Parameter Condition Min. Typ. Max. Unit Oscillator Section fOSC Normal PWM Frequency Center Frequency VFB > VFB-N 60 65 68 kHz Hopping Range VFB ≥ VFB-N ± 4.0 VFB = VFB-G ± 2.9 thop-1 Hopping Period 1 VFB ≥ VFB-N 4.4 ms thop-3 Hopping Period 3 VFB = VFB-G 11.5 ms fOSC-G Green Mode Minimum Frequency 18 22 26 kHz VFB-N FB Threshold Voltage for Frequency Reduction 2.4 2.5 2.6 V VFB-G FB Voltage at fOSC-G 2.1 2.2 2.3 V VFB-ZDC FB Threshold Voltage for Zero-Duty 1.6 V VFB-ZDCR - VFB-ZDC ZDC Hysteresis 0.15 V fDV Frequency Variation vs. VDD Deviation VDD = 7.5V to 21V 0.5 2.0 % fDT Frequency Variation vs. Temperature Deviation TA = -40 to +105°C 2 % Continued on following page… Figure 5. PWM Frequency PWM Frequency fOSC fOSC-G VFB-N VFB-G VFB-ZDC VFB VFB-ZDCR |
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