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AN3172 Fiches technique(PDF) 13 Page - STMicroelectronics

No de pièce AN3172
Description  This application note describes the performance of a 90 W
PDF  31 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3172 Fiches technique(HTML) 13 Page - STMicroelectronics

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AN3172
Harmonic content measurement
Doc ID 17230 Rev 1
13/31
3
Harmonic content measurement
The board has been tested according to the European standard EN61000-3-2 Class-D and
Japanese standard JEITA-MITI Class-D, at both the nominal input voltage mains. As shown
in Figure 5 and 6, the circuit is able to reduce the harmonics well below the limits of both
regulations.
On the bottom side of the diagrams the total harmonic distortion and power factor have also
been measured. The values in all conditions give a clear idea about the correct functioning
of the PFC.
Figure 5.
Compliance to EN61000-3-2 at 230
Vac - 50 Hz, full load
Figure 6.
Compliance to JEITA-MITI at 100
Vac - 50 Hz, full load
THD = 5.13 % - PF = 0.965
THD = 3.89 % - PF = 0.996



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