PFC/PWM controller provides higher efficiency in dual-switch flyback topologies
December 16, 2010 // Paul Buckley
Fairchild Semiconductor has introduced an integrated critical mode PFC and quasi-resonant current mode PWM controller that meets regulatory requirements by providing more than 90 percent efficiency and less than 300 mW at no load for increased power savings.
The FAN6920MR combines a power factor correction (PFC) controller and a quasi-resonant PWM controller for a cost effective design that uses fewer external components. The device was developed for power engineers, especially those involved in All-In-One (AIO) PC power, Slim Pack PC adapters, LCD TV and LED lighting designs, that require a dual switch flyback topology to provide the higher efficiency and increased energy savings demanded by government regulations – something that LLC or single flyback solutions cannot provide.
For PFC, the device uses a controlled on-time technique to provide a regulated DC output voltage and to perform natural power factor correction. With an innovative total harmonic distortion (THD) optimizer, the FAN6920MR can reduce input current distortion at zero-crossing duration to improve THD performance.
For PWM control, the FAN6920MR provides several functions to enhance the power system performance including extended valley detect up to the 12th valley cycle for reduced switching frequency, improved light load efficiency, green-mode operation, an internal 10ms soft start and high/low line over-power compensation.
Additionally, the device provides many protection functions including brownout, secondary-side open-loop and over-current with auto recovery, external auto-recovery protection triggering and internal over-temperature shutdown.
Available in a 16-pin small outline package (SOP), the FAN6920MR is ideal for AIO computers, AC/DC netbook adapters (Slim Pack), open-frame SMPS and battery chargers, as well as LCD TV and LED street lights.
Fairchild enables engineers to drive innovation in their designs by developing solutions like the FAN6920MR, which is part of a family of integrated critical mode PFC and quasi-resonant current mode PWM controllers. The devices integrate functionality, increase performance and provide full protection while lowering component counts, simplifying design and reducing bill of material costs.
Availability and Pricing
Samples of the FAN6920MR are available now priced at $00.82 in 1,000 quantity pieces
More information about the FAN6920MR at www.fairchildsemi.com/ds/FA/FAN6920MR.pdf
Visit Fairchild Semiconductor at www.fairchildsemi.com
Conspiracy alleged over Rousset wafer fab closure
March 07, 2014
A class action lawsuit has been filed in Federal Court in New York alleging that Atmel Corp. (San Jose, Calif.) conspired ...
Europe loses PV market lead to Asia in 2013
Driverless car sharing concept focuses on digital comfort
Automated SSL test system authenticates LED technology performance
Paper-thin ultracapacitor aims to boost Li-ion battery performance
Apple set to transform sapphire wafer market
March 07, 2014
The sapphire industry ended an 18 month period of depressed pricing and achieved $936 million in revenue for wafer products ...
FTDI reveals streaming instruction behind new 32bit architecture
AMD taps UK tool for video verification
UHF RFID the radio technology of choice for Industry 4.0
- DSM presents: Select the best plastic for DDR4
- Wireless Sensor Network Challenges and Solutions
- Putting FPGAs to Work in Software Radio Systems Handbook
- Real-Time Spectrum Analysis for Troubleshooting 802.11n/ac WLAN Devices
InterviewWi-Fi is open for business, which is good news for mobile subscribers
Following the news that Netgear has built a Facebook-linked amenity Wi-Fi option into its routers, enabling businesses to offer free Wi-Fi in return for liking the company Facebook page, David Nowicki, ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Freescale is giving away ten RIoTboards, worth 74 dollars each, for EETimes Europe's readers to win.
Designed to run Android operating systems efficiently or to run under Linux, the board is based on the Freescale i.MX 6Solo processor; using the ARM Cortex-A9 architecture.
And the winner is...
In our previous reader offer, Crystal Display was giving...Read more
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.