FAN6920MR − Integrated Critical Mode PFC and Quasi-Resonant Current Mode PWM Controller

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).

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Product Status/Pricing/Packaging

Index	Product	Product & Eco Status	*Pricing	Packaging & Packing Info	**Package Marking Convention	Qualification Support	Compliance Certificates
0	FAN6920MRMY	Full Production Green as of Dec 2009	$1.2	SO 16L NB Details SO 16L NB Drawing  TAPE REEL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &2 (2-Digit Date Code) &K Line 2:FAN6920MR Line 3:MYJ	FIT :  1   ESD (CDM) :  1250  V ESD (HBM) :  4500  V Show more... Moisture Sensitivity Level (MSL) :  3   Max Reflow Temp :  260	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG

• Fairchild 1,000 piece Budgetary Pricing. *
• If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
• Top mark packaging information for product FAN6920MR is available. **

Features

• Integrated PFC and Flyback Controller
• Critical-Mode PFC Controller
• Zero-Current Detection for PFC Stage
• Quasi-Resonant Operation for PWM Stage
• Internal Minimum t_OFF 5µs for QR PWM Stage
• Internal 5ms 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 Latched (RT Pin)
• VDD Pin and Output Voltage OVP (Auto-Recovery)
• Internal Temperature Shutdown (140°C)

Applications

Application Notes

Technical Articles

A High Power Factor Flyback with Constant-Current Output for LED Lighting Applications

AX-CAP Technology

Dual-Switch Quasi-Resonant Flyback Converter

Videos

mWSaver™ Technology - Dual Switch Flyback Solution

View all videos

Reference Designs

Online Seminar

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.

Evaluation Boards

Fairchild offers the following evaluation board(s) for this product.