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Products » FAN6921MR Integrated Critical Mode PFC and Quasi-Resonant Current Mode PWM Controller

FAN6921MR − Integrated Critical Mode PFC and Quasi-Resonant Current Mode PWM Controller

The highly integrated FAN6921MR combines Power Factor Correction (PFC) controller and Quasi-Resonant PWM controller. Integration provides cost effect design and allows for fewer external components.

For PFC, FAN6921MR 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, FAN6921MR can reduce input current distortion at zero-crossing duration to improve THD performance.

For PWM, FAN6921MR provides several functions to enhance the power system performance: valley detection, green-mode operation, high / low line over power compensation. FAN6921MR provides many protection functions as well: secondary-side open-loop and over-current with auto recovery 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 UVP.

The FAN6921MR 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	FAN6921MRMY	Full Production Green as of Dec 2009	$1.26	SO 16L NB Details SO 16L NB Drawing TAPE REEL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &2 (2-Digit Date Code) &K Line 2:FAN6921MR Line 3:MYD	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 FAN6921MR 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 8µs for QR PWM Stage
Internal 10ms Soft-Start for PWM
Brownout Protection
High / Low Line Over-Power Compensation
Auto-Recovery Over-Current Protection
Auto-Recovery Open-Loop Protection
Externally Latch Triggering (RT Pin)
Adjustable Over-Temperature Latched (RT Pin)
VDD Pin and Output Voltage OVP (Latched)
Internal Over-Temperature Shutdown (140°C)

Applications

AC-DC Merchant Power Supply

Application Notes

Application Note	Description
AN-6920MR	Integrated Critical-Mode PFC / Quasi-Resonant Current-Mode PWM Controller FAN6920MR(795 K) 02-Apr-2013
AN-6204	FAN6204 - Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification(682 K) 10-Apr-2013
AN-6921	Integrated Critical Mode PFC / Quasi-Resonant(598 K) 05-Apr-2013

Reference Designs

Application	Document Number	Featured Products	Output Power	Input Voltage	Topology
Notebook Adapter	RD-269	FAN6921ML, FAN6921MR	90W	90-264V_AC	BCM Boost PFC and Quasi-Resonant Flyback Converter

Additional Resources

Design Tools Knowledgebase – Ask a Question Find a local sales office Product change notices (PCN) How to Buy Products or Order Samples

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