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What is power factor correction?
In an electric power system, a load with low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. The higher currents increase the energy lost in the distribution system, and require larger wires and other equipment.
A device that draws an apparent power of 1kVA and has a 0.5pf consumes 500W, not 1kW. Power factor correction (PFC) is, essentially, what you do to complex AC loads, such as switch mode power supplies, to make them act more like simple loads, such as toasters.
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2013-05-14 XP Power outs 80 Plus certified 150W AC-DC power supply
The GCS150 is available with a 12, 15, 24, 28 or 48VDC single output voltage and can deliver up to 110W.
2002-07-12 Xantrex programmable power supply delivers 12W
Xantrex Technology Inc. has announced the addition of a 12kW model for its XDC series of programmable digital control power supply
2008-01-24 Wide mains, 19V/8A power supply including power factor correction
On Semi's NCP1605 is a power factor controller that features a "pfcOK" pin to enable the downstream converter when the power factor correction stage is ready for operation.
2014-11-28 Vicor aims to produce power supply parts in Asia, says CEO
Patrizio Vinciarelli, president, CEO and chair of Vicor, said the company is investing to broaden its horizons to include large volume manufacturing in computing, automotive and consumer electronics.
2013-07-24 Using resonant power supply control IC with PFC
Read about the SSL4120 functions used in the typical application.
2005-06-22 Using critical conduction mode for high power factor correction
This app note discussed power factor correction (PFC), which is a necessity for off-line switchmode power supplies requiring output powers of 75W or more.
2005-06-10 UCC28517 100-W PFC power converter with 12V, 8W bias supply, Part 1
This app note reviews the design of a 100W ac/dc power stage with power factor correction.
2007-04-17 Total power solutions target LCD TV SMPS apps
Fairchild announced it is offering the new Stealth II and Hyperfast II diode technology as part of a total power device solution specifically designed to optimize LCD TV SMPS applications
2014-09-12 TI rolls ecosystem for digital power tool designers
The third-party ecosystem of digital power hardware and software tools allow digital power design engineers who use TI's portfolio of C2000 MCUs to develop their systems quickly and easily
2008-05-15 TI acquires power management company
Beefing up efforts in power management, TI has acquired Irish power supply reference design provider Commergy Technologies
2006-11-15 Thyristor modules enable power factor correction caps
Epcos' new thyristors enable power factor correction capacitors to be switched silently and without wear, for a longer life.
2002-12-03 TDI dc supplies head for distributed power
Transistor Devices Inc.'s Mercury 1.2kW front-end dc power supply is suited for distributed architectures and rectifier apps
2006-10-02 Switching power supplies feature economical design
Citing its economical design, V-Infinity's new U-frame switching power supply delivers up to 200W for wireless, datacom and industrial applications
2008-03-19 Switching power supplies come in three packs
Astrodyne Corp. has introduced a multi-package PMK225 line of high density switching power supplies that provide output power of 225W with active power factor correction.
2006-06-16 Switching 350W power supply delivers 54V output
Emerson Network Power's Astec NTS Series line of 350W AC/DC switching power supplies includes new 54V output configurations for front-end and distributed power applications
2005-09-12 Streamlining power delivery systems for servers
The need for more efficient systems has become paramount especially in servers and main frames.
2007-11-06 Smallest 400W power supply rolls for medical apps
SynQor has launched its first AC/DC product designed specifically for medical applications.
2013-05-09 SiC power devices success rests on EV/HEV adoption
Yole Dveloppement points out that wide-bandgap transistor and diode growth potential is obscured by automotive qualification though PV inverter growth remains positive.
2005-06-27 Semiconductor technologies for power management (Part 3
Understand better why ICs and discrete transistors require very different methods of fabrication.
2000-06-16 Semiconductor kit package for power factor corrector
This application note presents a new line of PFC-dedicated products. Both silicon and packaging have been optimized to reduce system costs, including filtering. The products shown here are offered as a kit for power factor correction.
2010-02-19 Resonant converter packs power factor correction
From NXP Semiconductors comes the GreenChip TEA1713 resonant half-bridge converter claimed to be the first resonant controller with integrated power factor correction.
2009-03-02 Ref design fuses LCD power supply, inverter
ON Semiconductor has announced the availability of its latest GreenPoint open reference design for LCD TV power supplies
2007-09-12 Rectifiers boast power factor correction efficiency
Qspeed Semiconductor has introduced its Q-Series rectifier family designed for use in power factor correction circuits that deliver from 200W to 1,000W of power.
2007-02-06 Primary side power module rolls for LCD TVs
Potentia Semiconductor claims the industry's first primary side power module for LCD TVs with screen sizes from 32 inches to 65 inches
2003-10-07 Power-One supply module features remote control
Power-One Inc. has introduced the MPB125-4350R, a 125W ac-dc power supply that provides remote on and off functionality
2014-03-25 Power trends take spotlight at APEC 2014
During this year's APEC, global players such as Fairchild, Intersil and Texas Instruments revealed their business plans and product offerings in anticipation of the power efficiencies demanded by next-generation electronic devices
2006-03-28 Power supply solution delivers less than 1W standby power
ON Semiconductor unveiled its third GreenPoint reference design for 220W LCD-TV power supplies
2010-08-04 Power supply meets Climate Savers Computing Gold standard
The DS460S-3 from Emerson Network Power is a bulk front end AC-DC power supply that can achieve a high typical conversion efficiency of 92 percent at 50 percent full load, meeting the Climate Savers Computing Gold standard
2013-01-28 Power supply demand will drive IC growth boost
Despite the largely flat market for power supplies in 2012, semiconductors used in power supplies are projected to grow by $45 million from 2012 to 2016
2004-08-18 Power One ac-dc supply has two high-current outputs
Power One's NET2-4350 is a 400W ac-dc supply featuring a special dual-converter topology that provides two tightly regulated high-current outputs
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