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AN3233 Datenblatt(PDF) 13 Page - STMicroelectronics

Teilenummer AN3233
Bauteilbeschribung  This application note describes the characteristics
PDF  35 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3233 Datenblatt(HTML) 13 Page - STMicroelectronics

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AN3233
Harmonic content measurement
Doc ID 17595 Rev 1
13/35
3
Harmonic content measurement
The board has been tested according to the European standard EN61000-3-2 Class-D and
the Japanese standard JEITA-MITI Class-D, at both the nominal input voltage mains. As
shown in the following images, the circuit is able to reduce the harmonics well below the
limits of both regulations.
Figure 5.
Compliance with EN61000-3-2 at 230 Vac – 50 Hz, full load
THD = 14.70 % - PF = 0.978
Figure 6.
Compliance with JEITA-MITI at 100 Vac – 50 Hz, full load
THD = 5.20 % - PF = 0.995
On the bottom side of the diagrams the total harmonic distortion (THD) and power factor
(PF) have been measured too. The values in all conditions give a clear idea regarding the
correct functioning of the PFC.
0.1
1
Measured Value
EN610003 2 ClassD Limits
0.0001
0.001
0.01
0.1
1
1
3
579
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Harmonic Order [n]
0.1
1
Measured Value
JEITAMITI Class D Limits
0.0001
0.001
0.01
0.1
1
1
3
57
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Harmonic Order [n]



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