Information about power factor correction devices

[simce]

Power factor correction

Hi,
Maybe this is novice question, but i'm MCU system designer, and i need information about power factor corrector devices. Well i saw in one PSU chip L6561 that is driving MOSFET and it is used as switching PSU that works from 85-250 VAC. But i can not understand where is power factor corrected with this device. It is used as switching PSU controller.
Please anyone help me to demistify this!
Best Regards,
Sime

 

[papyaki]

Re: Power factor correction

Hi

These articles can help you understand what is PFC :

h**p://www.ece.msstate.edu/classes/design/ece4522/2003_spring/power_factor/design_document.pdf

h**p://www.realizeyourpower.com/pfc/applikationen/App-Note-4004-Fairchild.pdf



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