AN3203 datasheet(25/49 Pages) STMICROELECTRONICS

Part #	AN3203

Description	This application note describes the characteristics and performance

PDF	49 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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25 / 49 page

AN3203

Electrical performance

Doc ID 17402 Rev 2

25/49

4.3

Harmonic content measurement

The front-end PFC stage provides the reduction of the mains harmonic, allowing European

EN61000-3-2 and Japanese JEITA–MITI standards for class D equipment to be met.

Figure 19 shows the harmonic contents of the mains current at full load.

A measurement has also been taken with a 75 W input power which is the lowest limit for

using harmonic reduction techniques.

To evaluate the performance of the PFC stage the PF and THD vs. input voltage graphs are

also shown, in Figure 21 and Figure 22, at full load and 75 W input power load conditions.

Table 9 shows the PF values at the three different load amounts defined in the 80 PLUS®

and climate savers computing requirements.

Figure 19.

EN61000-3-2 and JEITA-MITI measurements @ full load

Figure 20.

EN61000-3-2 and JEITA-MITI measurements @ 75 W in

AN3203 Datasheet(PDF) 25 Page - STMicroelectronics