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AN667

Part Number	AN667
Manufacturer	ST Micro
Description	DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR WITH THE L6560/A TRANSITION MODE I.C.
Published	Apr 19, 2005
Detailed Description	® APPLICATION NOTE DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR WITH THE L6560/A TRANSITION MODE I.C. by G. Co...
Datasheet	AN667 PDF File

Overview

® APPLICATION NOTE DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR WITH THE L6560/A TRANSITION MODE I.
C.
by G.
Comandatore and U.
Moriconi Active power factor correction techniques are going to grow in conversion applications.
Market interest (legislation to be considered) is also moving towards fairly low (36-150W) conversion power ranges (lighting, monitor).
This paper describes an "easy to use" 8 Pin Controller that allows the realization of very low cost offline Power Factor Correction.
Switching at a frequency much higher than the line, the preregulator draws a half-sinusoidal input current, in phase with the line voltage.
BOOST TOPOLOGY with its inductor at the input is well su...

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