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This literature is subject to all applicable copyright laws and is not for resale in any manner.FAN6921AMR Integrated Critical-Mode PFC and Quasi-Resonant Current-Mode PWM Controller May 2013 FAN6921AMR Integrated Critical-Mode PFC and Quasi-Resonant Current-Mode PWM Controller Features Description The highly integrated FAN6921AMR combines a Power Integrated PFC and Flyback Controller Factor Correction (PFC) controller and a Quasi- Critical-Mode PFC Controller Resonant PWM controller. Integration provides cost- effect design and allows for fewer external components. Zero-Current Detection for PFC Stage For PFC, FAN6921AMR uses a controlled on-time Quasi-Resonant Operation for PWM Stage technique to provide a regulated DC output voltage and Internal Minimum t 8 s for QR PWM Stage OFF to perform natural power factor correction. An innovative THD optimizer reduces input current distortion at zero- Internal 10 ms Soft-Start for PWM crossing duration to improve THD performance. Brownout Protection For PWM, FAN6921AMR provides several functions to High / Low Line Over-Power Compensation enhance power system performance: valley detection, green-mode operation, high / low line over-power Auto-Recovery Over-Current Protection compensation. Protection functions include secondary- Auto-Recovery Open-Loop Protection side open-loop and over-current with auto-recovery protection, external latch triggering, adjustable over- Externally Latch Triggering (RT Pin) temperature protection by the RT pin and external NTC Adjustable Over-Temperature Latched (RT Pin) resistor, internal over-temperature shutdown, VDD pin OVP, DET pin over-voltage for output OVP, and brown- VDD Pin and Output Voltage OVP (Latched) in / out for AC input voltage UVP. Internal Over-Temperature Shutdown (140C) The FAN6921AMR controller is available in a 16-pin, small-outline package (SOP). Applications AC/DC NB Adapters Open-Frame SMPS Battery Charger Ordering Information OLP Operating Packing Part Number Package Mode Temperature Range Method -40 C to +105 C 16-Pin, Small-Outline Package (SOP) FAN6921AMRMY Recovery Tape & Reel 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6921AMR Rev. 1.0.2