AN2521 datasheet(12/33 Pages) STMICROELECTRONICS

12 / 33 page

Test results

AN2521

12/33

On the bottom side of each diagram the total harmonic distortion and power factor have

been measured as well. The values in all conditions give a clear idea of the correct

functioning of the PFC even if the tracking boost option has been implemented.

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

and full load are shown below.

Figure 11.

EVAL6668-75W compliance to

EN61000-3-2 standard @230 V, 50

Hz - half load

Figure 12.

EVAL6668-75W compliance to

JEIDA- MITI standard @100 V, 60 Hz

- half load

0.0001

0.001

0.01

0.1

1 3 5 7 9 11 13 151719 212325 27 2931 333537 39

Harmonic Order [n]

Measured value

EN61000-3-2 Class-D limits

0.0001

0.001

0.01

0.1

1 3 5 7 9 1113151719 21232527293133 353739

Harmonic Order [n]

Measured value

JEIDA-MITI Class-D limits

Figure 13.

EVAL6668-75W input current

waveform @100 V, 60 Hz - full load

Figure 14.

EVAL6668-75W input current

waveform @230 V, 50 Hz - full load

CH1: input mains voltage

CH2: input mains current

CH1: input mains voltage

CH2: input mains current

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