Input Line Current Harmonic Content And Line Flicker; Magnetic Leakage Fields; Table 16. Harmonic Limits, Class D Equipment - Intel ATX12V Design Manual

ATX12V Power Supply Design Guide
Version 2.0 Final Review Copy

6.3. Input Line Current Harmonic Content and Line Flicker

For sales in EU (European Union) or Japan the power supply shall meet the requirements of
EN61000-3-2 Class D and the Guidelines for the Suppression of Harmonics in Appliances
and General Use Equipment Class D for harmonic line current content at full rated power.
See Table 16 for the harmonic limits.
Harmonic Order
n
3
5
7
9
11
13
≤ ≤
15 n 39

6.4. Magnetic Leakage Fields

A PFC choke magnetic leakage field should not cause any interference with a high-
resolution computer monitor placed next to or on top of the end-use chassis.
40

Table 16. Harmonic Limits, Class D Equipment

Per: EN 61000-3-2
Maximum permissible Harmonic
current at 230 VAC / 50 Hz in Amps
2.3
1.14
0.77
0.4
0.33
0.21
0.15 x (15/n)
Per: JEIDA MITI
Maximum permissible Harmonic
current at 100VAC / 50 Hz in Amps
Odd harmonics
5.29
2.622
1.771
0.92
0.759
0.483
0.345 x (15/n)