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FAN6921ML Dataheets PDF



Part Number FAN6921ML
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description Integrated Critical Mode PFC/Quasi-Resonant Current Mode PWM Controller
Datasheet FAN6921ML DatasheetFAN6921ML Datasheet (PDF)

FAN6921ML — Integrated Critical Mode PFC / Quasi-Resonant Current Mode PWM Controller March 2016 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 8 µs for QR PWM Stage  Internal 10 ms Soft-Start for PWM  Brownout Protection  H/L Line Over-Power Compensation (OPC)  Latched Pro.

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FAN6921ML — Integrated Critical Mode PFC / Quasi-Resonant Current Mode PWM Controller March 2016 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 8 µs for QR PWM Stage  Internal 10 ms 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 QuasiResonant PWM controller. Integration provides costeffect 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 brown-in/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 FAN6921MLMY Latch -40°C to +105°C 16-Pin Small Outline Package (SOP) Packing Method Tape & Reel © 2010 Fairchild Semiconductor Corporation FAN6921ML • Rev. 1.7 www.fairchildsemi.com FAN6921ML — Integrated Critical Mode PFC / Quasi-Resonant Flyback PWM Controller Application Diagram 14 6 4 3 1 16 ZCD OPFC CSPFC INV RANGE HV 13 VIN GND 9 FAN6921 NC 15 OPWM 8 COMP RT FB DET VDD CSPWM 5 2 12 11 10 7 Figure 1. Typical Application © 2010 Fairchild Semiconductor Corporation FAN6921ML • Rev. 1.7 2 www.fairchildsemi.com FAN6921ML — Integrated Critical Mode PFC / Quasi-Resonant Flyback PWM Controller Internal Block Diagram COMP HV VDD INV CSPFC FB CSPWM DET 2 RANGE 2.65V Multi-Vector Amp. 2.75V RANGE 2.75V 2.9V 2.3V 0.45V 16 7 IHV OVP 27.5V OVP Latched Two Steps UVLO 18V/10V/7.5V UVP Debounce 70µs 3 Latched Brownout S SET Q R CLR Q Internal Bias 15 NC DRV 15.5V 6 OPFC 4 11 2.5V THD Optimizer Blanking Circuit 0.6V PFC Current Limit VCTL-PFC-ON/OFF Debounce .


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