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February 2013
?2012 Fairchild Semiconductor Corporation
 
www.fairchildsemi.com
FAN6920MR " Rev. 1.0.8
 
FAN6920MR
mWSaver" Technology Integrated Critical-Mode PFC
and Quasi-Resonant Current-Mode PWM Controller
 
Features
?   mWSaver" Technology Provides Industry's Best-
in-Class Standby Power
-   Internal High-Voltage JFET Startup
-   Adaptive Off-Time Modulation of t
OFF-MIN
 for QR
PWM Stage, Improved Light-Load Efficiency
-   PFC Burst or Shutdown at Light-Load Condition
-   Optimized for Dual Switch Flyback Design to
Achieve > 90% Efficiency While Meeting 2013
ErP lot 6 Standby Power Requirement
?   Integrated PFC and Flyback Controller 
?   Critical-Mode PFC Controller 
?   Zero-Current Detection for PFC Stage 
?   Quasi-Resonant Operation for PWM Stage 
?   Internal 5 ms Soft-Start for PWM 
?   Brownout Protection 
?   High / Low Line Over-Power Compensation 
?   Auto-Recovery Over-Current Protection 
?   Auto-Recovery Open-Loop Protection 
?   Externally Auto-Recovery Triggering (RT Pin) 
?   Adjustable Over-Temperature Protection 
?   VDD Pin and Output Voltage OVP (Auto-Recovery) 
?   Internal Over-Temperature Shutdown (140?/SPAN>C) 
Applications
?   AC/DC NB Adapters 
?   Open-Frame SMPS 
?   Battery Charger 
Description
The highly integrated FAN6920MR combines Power
Factor Correction (PFC) controller and quasi-resonant
PWM   controller.   Integration   provides   cost-effective
design and reduces external components.
For   PFC,   FAN6920MR   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, FAN6920MR can reduce
input current distortion at zero-crossing duration to
improve THD performance.
For PWM, FAN6920MR provides several functions to
enhance the power system performance: valley detection,
green-mode operation, and high / low line over-power
compensation. Protection functions include secondary-
side   open-loop   and   over-current   with   auto-recovery
protection; external auto-recovery triggering; adjustable
over-temperature protection by the RT pin; and external
NTC resistor, internal over-temperature shutdown, V
DD
 
pin OVP, and the DET pin over-voltage for output OVP,
and brown-in / out for AC input voltage UVP.
The FAN6920MR controller is available in a 16-pin
small-outline package (SOP).
Related Resources
?   Evaluation Board: FEBFAN6920MR_T02U120A
Ordering Information
Part Number     OLP Mode
Operating
Temperature Range
Package
Packing
Method
FAN6920MRMY
Recovery
-40癈 to +105癈
16-Pin Small Outline Package (SOP)    Tape & Reel
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