Datasheet

Test results and significant waveforms AN2994
8/38 Doc ID 15796 Rev 2
2 Test results and significant waveforms
2.1 Harmonic content measurement
One of the main purposes of a PFC pre-conditioner is to correct the input current distortion,
decreasing the harmonic contents below the limits of the relevant regulations. Therefore, the
board has been tested according to the European rule EN61000-3-2 Class-D and Japanese
rule JEITA-MITI Class-D, at full load and 70 W output power, at both the nominal input
voltage mains.
As shown in the following figures, the circuit can reduce the harmonics well below the limits
of both regulations from full load down to light load. An output power of 70 W has been
chosen because it is almost the lower power limit at which the harmonics have to be limited
according the mentioned rules.
Figure 3. EVL6563S-400W compliance to
EN61000-3-2 Standard at full load
Figure 4. EVL6563S-400W compliance to
JEITA-MITI Standard at full load

0.0001
0.001
0.01
0.1
1
10
1 3 5 7 9 111315171921232527293133353739
Harmonic Order [n]
Harmonic Current [A]
Measured value EN61000-3-2 Class-D limi ts

0.0001
0.001
0.01
0.1
1
10
1 3 5 7 9 11 1 3 15 17 19 21 23 25 27 29 31 33 35 37 39
Harmonic Order [n]
Harmonic Current [A]
Measured value JEIT A-MITI limits
Figure 5. EVL6563S-400W compliance to
EN61000-3-2 Standard at 70 W load
Figure 6. EVL6563S-400W compliance to
JEITA-MITI Standard at 70 W load

0.0001
0.001
0.01
0.1
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Harmonic Order [n]
Harmonic Current [A]
Measured value EN61000-3-2 Class-D limi ts

0.0001
0.001
0.01
0.1
1
13579111315171921232527293133353739
H armo nic Order [n]
Harmon ic Cu rrent [A]
Measured v alue JEITA-MITI limits