AN2852 datasheet(20/35 Pages) STMICROELECTRONICS

20 / 35 page

Electrical performance

AN2852

20/35

3.2

Harmonic content measurement

The front-end PFC stage provides the reduction of the mains harmonic, allowing meeting

European EN61000-3-2 and Japanese JEIDA-MITI standards for class D equipment.

Figure 18 and 19 show the harmonic contents of the mains current at full load.

A measure has been done also with 75 W input power which is the lower limit for using

harmonic reduction techniques.

Figure 18.

EN61000-3-2 measurements at full

load

Figure 19.

JEIDA-MITI measurements at full

load

AM01833v1

0.0001

0.001

0.01

0.1

579 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

Harmonic order (n)

Measurements @ 230Vac Full load

EN61000-3-2 class D limits

AM01834v1

0.0001

0.001

0.01

0.1

9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

Harmonic order (n)

Measurements @ 100Vac Full load

JEIDA-MITI class D limits

Figure 20.

EN61000-3-2 measurements at 75 W

input

Figure 21.

JEIDA-MITI measurements at 75 W

input

AM01835v1

0.0001

0.001

0.01

0.1

11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

Harmonic order (n)

Measurements @ 230Vac 75W in

EN61000-3-2 class D limits

AM01836v1

0.0001

0.001

0.01

0.1

579 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

Harmonic order (n)

Measurements @ 100Vac 75W in

JEIDA-MITI class D limits

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