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FAN6755UWMY Folha de dados(PDF) 8 Page - Fairchild Semiconductor |
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FAN6755UWMY Folha de dados(HTML) 8 Page - Fairchild Semiconductor |
8 / 17 page © 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6755W / FAN6755UW • Rev. 1.0.7 8 Electrical Characteristics VDD=15 V, TA=25C, unless otherwise noted. Symbol Parameter Conditions Min. Typ. Max. Unit Feedback Input Section AV Internal FB Voltage Attenuation 1/4.5 1/4.0 1/3.5 V/V ZFB Input Impedance VFB=4 V 10 15 19 kΩ VFB-OPEN The Maximum Clamp of FB Voltage FB Pin Open 5.1 5.3 5.5 V VFB-OLP FB Open-Loop Protection Triggering Level 4.4 4.6 4.8 V tD-OLP Delay Time of FB Pin Open-loop Protection 45.0 62.5 70.0 ms VFB-N Green-Mode Entry FB Voltage 2.8 3.0 3.2 V VFB-G Green-Mode Ending FB Voltage VFB-N - 0.6 V VFB-ZDCR FB Threshold Voltage for Zero-Duty Recovery 1.6 1.8 2.0 V VFB-ZDC FB Threshold Voltage for Zero-Duty 1.4 1.6 1.8 V VFB-ZDCR - VFB-ZDC ZDC Hysteresis 0.12 0.15 0.19 V fOSC fOSC-G V V FB-N FB-G FB V Frequency PWM Frequency FB-ZDC V FB-ZDCR V + hopping range - hopping range +1.76KHz -1.76KHz Figure 7. VFB vs. PWM Frequency Continued on the following page… |
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Descrição semelhante - FAN6755UWMY |
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