AN3106 datasheet(10/34 Pages) STMICROELECTRONICS

10 / 34 page

Input current harmonics measurement

AN3106

10/34

Doc ID 16775 Rev 2

Input current harmonics measurement

One of the main purposes of a PFC preconditioner is the correction of input current

distortion, decreasing the harmonic contents below the limits of the relevant regulations.

Therefore, this demonstration board has been tested according to the European norm

EN61000-3-2 Class-C and Japanese norm JEITA_MITI Class-C both relevant to lighting

equipment, at full load and nominal input voltage mains. The measurements are shown in

Figure 5 and Figure 6.

For user reference, waveforms of the input current and voltage at nominal input voltage

mains during full-load operation are shown in Figure 5 and Figure 6. Figure 7 and Figure 8

give the input current and voltage at nominal input voltage mains 50% load, showing that in

spite of the wide input voltage range, the current waveform shape is still good.

Figure 5.

EVL130W-STRLIG demonstration

board: compliance to EN61000-3-2

Class-C standard

Figure 6.

EVL130W-STRLIG demonstration

board: compliance to JEITA-MITI

Class-C standard

VIN = 230

VAC - 50 Hz,

PIN = 138.8 W

THD = 8.70%,

PF = 0.976

VIN = 100

VAC - 50 Hz, PIN = 141.3 W

THD = 3.31%,

PF = 0.994

Figure 7.

EVL130W-STRLIG demonstration

board: input current waveform

at 230 V - 50 Hz - 65 W load

Figure 8.

EVL130W-STRLIG demonstration

board: input current waveform

at 100 V - 50 Hz - 65 W load

CH1: AC input mains voltage

CH4: AC input mains current

CH1: AC input mains voltage

CH4: AC input mains current

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