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 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 UVP.
The FAN6920MR controller is available in a 16-pin small-outline package (SOP).
|Index||Product||Product & Eco Status||*Pricing||Packaging & Packing Info||**Package Marking Convention||Qualification Support||Compliance Certificates|
Green as of Dec 2009
|$1.2||SO 16L NB Details||
Line 1:$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code) &K
ESD (CDM) : 1250 V
ESD (HBM) : 4500 V
|AN-6920MR||Integrated Critical-Mode PFC / Quasi-Resonant Current-Mode PWM Controller FAN6920MR(795 K) 02-Apr-2013|
mWSaver™ Technology - Dual Switch Flyback Solution
|Application||Document Number||Featured Products||Output
|SMPS AIO PC Power||RD-352||FAN6204, FAN6920MR, FAN7382||120W||90~264V AC||Dual Switch Flyback|
|SMPS NB Adapter||RD-351||FAN6204, FAN6920MR, FAN7382||90W||90~264V AC||Dual Switch Flyback|
|SMPS AIO PC Power||RD-353||FAN6204, FAN6920MR, FAN7382||120W||90~264V AC||Dual Switch Flyback|
A High Power Factor Flyback with Constant-Current Output for LED Lighting Applications
This article explains the principles of AC/DC converters in flyback topology having a high power factor input and a constant current output. The most commonly used mode of operation for this purpose is boundary conduction mode (BCM). The basics of this mode are developed and its drawbacks are made clear. A simple method for improving power factor is introduced and explained in detail. Operating in DCM mode improves power factor and THD while reducing the peak drain voltage. A quick design example is given and the special issues of driving high power LEDs are explained.
Fairchild offers the following evaluation board(s) for this product.
|FEBFAN6920MR_T02U120A||Evaluation Board featuring the FAN6920MR, BCM PFC with a QR PWM Combination Controller, FAN7382, HVIC, and FAN6204MY, Synchronous Rectifier. This board targets 19V / 120 W applications.|