Buy the ARP T-Shirt! BIOS Optimization Guide Money Savers!
 
 28 February 2004
 N/A
  N/A
 Guides
 Dr. Adrian Wong
 1.0
 Discuss here !
 53580
 
   
The Tech ARP 2014 Mega Giveaway Contest (Week 10)
We have been working hard to arrange a ton of prizes, which we will give away every w... Read here
Desktop Graphics Card Comparison Guide Rev. 29.0
Covering 588 desktop graphics cards, this comprehensive comparison allows you ... Read here
   
Buy The BOG Book Subscribe To The BOG! Latest Money Savers!
Power Factor Correction : Correction Required
Digg! Reddit!Add to Reddit | Bookmark this article:

Power Factor Correction : Correction Required!

Power Factor Correction or PFC is the latest buzzword to be thrown around by power supply companies. Something they are making quite a lot of fuss about. And why not? There are very few features that differentiate one power supply from another.

Now, a lot has been said about PFC. Unfortunately, many of the explanations are either confusing or misleading. That's why we thought we would take a shot at clearing up the confusion.

 

What Is PFC?

First, let's take a look at what some manufacturers are saying about PFC. Here is a quote from Zalman :-

"In a conventional power supply with switching regulators, a rectifying circuit that converts an AC input source into a DC source for the primary circuit is used. In this rectifying circuit, a capacitor with a large capacitance is used to soften transient response and reduce ripple so that the switching regulator is not over-stressed.

However, the peak charge of the capacitor becomes greater with greater capacitance, and this leads to non-linear bursts of peak over-current into the primary circuit. Such peaks of current distort output voltage, create harmonic frequencies, and reduce power factor.

There is now an international standard for controlling harmonics (IEC100-3-2) and PFC is mandatory for home appliances consuming 70W or more power in EU nations as of January, 2001."

And here is a cryptic explanation by Enermax :-

"the utility PF rate =95% @ 230Vac at full rated load. From January 1, 2001, two standards¡mEN61000-3-2 (power line harmonics) and EN61000-3-3 (power line flicker)¡ngo into full effect to all EC countries. All products shipped to EC countries or placed on the market in this area must be compliant to these standards."

Confusing, isn't it? Well, let's clear up the confusion.



 
   
Western Digital Scorpio Blue (WD5000LPVT) 500 GB Slim Mobile Hard Disk Drive Review
NVIDIA GeForce GTX 680 Technology Report
Samsung Spinpoint F1 (HD103UJ) 1 TB Hard Disk Drive Review
Intel Desktop Chipset Roadmap @ June, 2008
How To Take Great Photos With Your Mobile Phone
AMD Quad-Core Opteron (Barcelona) Technology Report Part 2 Rev. 3.0
Samsung @ World Cyber Games 2007
The Tech ARP CPU Cooler Round-Up
Radeon 9800 Pro To Radeon 9800XT Mod Guide Rev. 6.0
Thermaltake Xaser Bag Review

 


Copyright © Tech ARP.com. All rights reserved.