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Design example using the L6563S-TM PFC Excel spreadsheet

AN3027

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Doc ID 16134 Rev 4

Design example using the L6563S-TM PFC Excel

spreadsheet

An Excel spreadsheet has been developed to allow a quick and easy design of a boost PFC

preregulator using the STM L6563S controller or the L6563H version, operating in transition

mode. As shown in

Figure 17 and Figure 18 the package and the pinout are different but

most functionalities are the same and therefore they can be calculated in the same way.

Figure 23 and Figure 24 show the first sheet filled with the input design data used in

Section 3.

Figure 23.

Excel spreadsheet design specification input table

Figure 24.

Other design data

Because in this example the PFC output voltage is required to be stable over the entire input

mains range, the TBO function is not used and the TBO pin is left floating on the board. To

use the spreadsheet to calculate a PFC circuit with stable output voltage, please set in the

specification section Vout1 = Vout2 = Voutx.

The tool is able to generate a complete part list of the PFC schematic represented in

Figure 25 (for L6563S) and Figure 26 (for L6563H) including the power dissipation

calculation of the main components.

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