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FAN6921ML 데이터시트(PDF) 1 Page - Fairchild Semiconductor |
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1 / 23 page June 2010 © 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6921ML • Rev. 1.0.1 FAN6921ML Integrated Critical Mode PFC/Quasi-Resonant Current Mode PWM Controller Features Integrated PFC and Flyback Controller Critical Mode PFC Controller Zero-Current Detection for PFC Stage Quasi-Resonant Operation for PWM Stage Internal Minimum toff 8µs for QR PWM Stage Internal 10ms Soft-Start for PWM Brownout Protection H/L Line Over-Power Compensation (OPC) Latched Protection (FB Pin) − Over-Power/ Overload Protection − Short-Circuit Protection − Open-Loop Protection Externally Latch Triggering (RT Pin) Adjustable Over-Temperature Latched (RT Pin) VDD Pin & Output Voltage OVP (Latched) Internal Temperature Shutdown (140°C) Applications AC/DC NB Adapters Open-Frame SMPS Battery Charger Description The highly integrated FAN6921ML combines a Power Factor Correction (PFC) controller and a Quasi- Resonant PWM controller. Integration provides cost- effect design and allows for fewer external components. For PFC, FAN6921ML uses a controlled on-time technique to provide a regulated DC output voltage and to perform natural power factor correction. With an innovative THD optimizer, FAN6921ML can reduce input current distortion at zero-crossing duration to improve THD performance. For PWM, FAN6921ML enhances the power system performance through valley detection, green-mode operation, and high / low line over power compensation. FAN6921ML provides: secondary-side open-loop and over-current protection, external latch triggering, adjustable over-temperature protection by RT pin and external NTC resistor, internal over-temperature shutdown, VDD pin OVP, and DET pin over-voltage for output OVP, and brownin/out for AC input voltage under-voltage protection (UVP). The FAN6921ML controller is available in a 16-pin small outline package (SOP). Ordering Information Part Number OLP Mode Operating Temperature Range Package Packing Method FAN6921MLMY Latch -40°C to +105°C 16-Pin Small Outline Package (SOP) Tape & Reel |
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